investor day 2021 - snc-lavalin
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2
Agenda
8:30 am Welcome and Opening Remarks
Denis Jasmin
VP, Investor Relations
8:35 am Pivoting to Growth and Creating Value
Ian Edwards
President & Chief Executive Officer
9:10 am Engineering the Future
Philip Hoare
President, Engineering Services (CA, UK&E, ME)
9:40 am Leveraging Our Capabilities to Drive Growth
Steve Morriss
President, Engineering Services (US, APAC, M&M)
10:05 am Q&A Session
10:35 am Break
10:40 am Driving Profitable Growth in O&M and Capital
Stéphanie Vaillancourt
President, Capital & O&M
11:00 am Capitalizing on Our Leading Nuclear Expertise
Sandy Taylor
President, Nuclear
11:25 am Delivering Results and Investing in the Future
Jeff Bell
Executive Vice President & Chief Financial Officer
11:45 am Closing Remarks
Ian Edwards
President & Chief Executive Officer
11:50 am Q&A Session

3
Forward-Looking Statements, Forward-Looking Financial Information and OutlookReference in this presentation, and hereafter, to the “Company” or to “SNC-Lavalin” means, as the context may require, SNC-Lavalin Group Inc. and all or some of its subsidiaries or joint arrangements or associates, or SNC-Lavalin
Group Inc. or one or more of its subsidiaries or joint arrangements or associates.
Statements made in this presentation that describe the Company’s or management’s budgets, estimates, expectations, forecasts, objectives, predictions, projections of the future or strategies may be “forward-looking statements”,
which can be identified by the use of the conditional or forward-looking terminology such as “aims”, “anticipates”, “assumes”, “believes”, “cost savings”, “outlooks”, “estimates”, “expects”, “goal”, “intends”, “may”, “plans”, “projects”,
“forecasts”, “should”, “synergies”, “target”, “vision”, “will”, “likely”, or the negative thereof or other variations thereon. Forward-looking statements also include any other statements that do not refer to historical facts. Forward-looking
statements also include statements relating to the following: i) future capital expenditures, revenues, expenses, earnings, economic performance, indebtedness, financial condition, losses and future prospects; ii) business and
management strategies and the expansion and growth of the Company’s operations; and iii) the expected additional impacts of the ongoing COVID-19 pandemic on the business and its operating and reportable segments as well as
elements of uncertainty related thereto. All such forward-looking statements are made pursuant to the “safe-harbour” provisions of applicable Canadian securities laws. The Company cautions that, by their nature, forward-looking
statements involve risks and uncertainties, and that its actual actions and/or results could differ materially from those expressed or implied in such forward-looking statements, or could affect the extent to which a particular projection
materializes. Forward-looking statements are presented for the purpose of assisting investors and others in understanding certain key elements of the Company’s current objectives, strategic priorities, expectations and plans, and inobtaining a better understanding of the Company’s business and anticipated operating environment. Readers are cautioned that such information may not be appropriate for other purposes.
This presentation also provides, on Slides 23, 54, 61, 69, 80, 96, 105, 106, 107, 108, 110 and 112 the Company’s outlook regarding expectations of the Company’s performance with respect to certain financial metrics and measures.
Forward-looking statements, forward-looking financial information and the Company’s outlook for 2021 made in this presentation are based on a number of assumptions believed by the Company to be reasonable as at the date
hereof. The assumptions are set out throughout the Company’s 2020 annual Management Discussion and Analysis (“MD&A”) (particularly in the sections entitled “Critical Accounting Judgments and Key Sources of Estimation
Uncertainty” and “How We Analyze and Report our Results”) and as updated in the first and second quarter 2021 MD&A. If these assumptions are inaccurate, the Company’s actual results could differ materially from those expressed
or implied in such forward-looking statements, forward-looking financial information and outlook. In addition, important risk factors could cause the Company’s assumptions and estimates to be inaccurate and actual results or events
to differ materially from those expressed in or implied by these forward-looking statements, forward-looking financial information and outlook. These risk factors are set out in the Company’s 2020 annual MD&A as updated in the first
and second quarter 2021 MD&A.
Non-IFRS Financial Measures and Additional IFRS MeasuresThe Company reports its financial results in accordance with IFRS. However, the following non-IFRS measures, additional IFRS measures and other non financial information, are used by the Company in this presentation: Segment
Adjusted EBIT, Segment Adjusted EBIT to segment revenue ratio, Adjusted EBITDA, Segment Adjusted EBITDA to segment revenue ratio and free cash flow. Additional details for these non-IFRS measures can be found below
and/or in Section 9 of SNC-Lavalin’s MD&A for the second quarter of 2021, filed with the securities regulatory authorities in Canada, available on SEDAR at www.sedar.com and on the Company’s website at www.snclavalin.com
under the “Investors” section, including the various reconciliations of non-IFRS to the most directly comparable IFRS measures in sections 4, and 9.4 of the second quarter 2021 MD&A and in sections 4 and 13.3 of the annual 2020
MD&A. Free cash flow reconciliation to the most directly comparable IFRS measure is provided on Slide 101. Certain revenue figures and changes thereto from prior periods are analyzed and presented on a constant currency basis
and are obtained by translating financial results from the comparable periods of the prior year denominated in foreign currencies at the foreign exchange rates of the current periods. Non-IFRS financial measures do not have any
standardized meaning under IFRS and therefore may not be comparable to similar measures presented by other issuers. Management believes that, in addition to conventional measures prepared in accordance with IFRS, these
non-IFRS measures provide additional insight into the Company’s operating performance and financial position and certain investors may use this information to evaluate the Company’s performance from period to period. However,
these non-IFRS financial measures have limitations and should not be considered in isolation or as a substitute for measures of performance prepared in accordance with IFRS.


5
Integrated Partner
Delivering Innovative
Digital Solutions to
Transform Industry
The Company of Choice to Meet the Demands of the Future
Premier Professional
Services and Project
Management
Company
Leading Expert and
Thought-Leader in
Sustainability and
Engineering Net Zero
Hinkley Point C
Somerset, UKCDOT Traffic Engineering Contract
Colorado. US
Dubai Opera House
Dubai, UAE

6
Pivoting to Growth
Focusing on becoming a services-oriented organization primed for growth
Derisked the business
and divested non-core assets
Built and expanded
a team of world-class leaders
to execute new strategic
direction
Focusing on core
SNC-Lavalin
businesses and
returning to investment
grade rating and
positive FCF*
Leveraging industry
leading capabilities
and reputation to drive
growth in core markets
and services
GROW
STRENGTHEN
FIX
2019 2020 2021 2022 2023 2024+
*Non-IFRS financial measures. See the cautionary statement regarding Non-IFRS financial measures at slide 3.

7
Experienced Leadership Team Focused on Execution
Sandy TaylorPresident,
Nuclear
Joined: 2014
Stéphanie VaillancourtPresident,
Capital and O&M
Joined: 2016
Ian EdwardsPresident and
Chief Executive Officer
Joined: 2014
Bob Alger President,
Major Projects
Joined: 2020
Jeff BellExecutive Vice-President
and Chief Financial Officer
Joined: 2020
Charlene Ripley
Executive Vice-President
and General Counsel
Joined: 2019
Erik Ryan
Executive Vice-President,
Strategy, Marketing and
External Relations
Joined: 2013
Louis Véronneau
Executive Vice-President &
Chief Transformation Officer
Joined: 2020
Nigel White
Executive Vice-President,
Project Oversight
Joined: 2019
James Cullens
Executive Vice-President,
Human Resources
Joined: 20172
New to SNC-Lavalin within last 3 years
Philip HoarePresident, Eng. Services
UK, Europe, ME and Canada
Joined: 20171
Steve MorrissPresident, Eng. Services
US, APAC and M&M
Joined: 2021
1. Joined SNC-Lavalin following the 2017 Atkins acquisition, where he held several senior positions since 1997
2. Joined SNC-Lavalin following the 2017 Atkins acquisition where he was a board member from 2014

8
Experienced Board of Directors
Michael PedersenPresident and CEO,
TD Bank U.S. Holding
Company
(2013-2017)
Isabelle CourvillePresident,
Hydro-Québec Distribution (2011-2013)
Steven NewmanPresident and CEO
Transcocean(2010-2015)
Zin Smati, Ph.D.Former President and
CEO, GDF SUEZ Energy
North America
Benita Warmbold, FCPA,
FCA, ICD.D
Senior Managing Director
and CFO, Canada Pension
Plan Investment Board(2013-2017)
Ian Edwards
President and
Chief Executive Officer
SNC-Lavalin
Mary-Ann Bell
SVP, Bell Aliant Regional
Communications (2009-2014)
Christie Clark
CEO and Senior Partner,
PricewaterhouseCoopers (2005-2011)
Gary Baughman
Chairman and CEO,
APTIM (2017-2019)
William (Bill) Young
Co-founder,
Monitor Clipper
60%
70%
70%
80%
80%
80%
90%
100%
Board Leadership
Operations
Finance
International
M&A
New to SNC-Lavalin Board within last 3 years
B O AR D S K I L L S M ATR I X
Corporate Experience
Strategic Planning
Industry Experience
Board Attributes
Avg. Age 60
Gender Diversity 30%
Independent 90%

9
Our values are the essence of our company’s identity. They represent how we act, speak and
behave together, and how we engage with our clients and stakeholders
We put safety at the heart of everything we do, to
safeguard people, assets and the environment
Our Values
We do the right thing, no matter what, and are
accountable for our actions
We work together and embrace each other’s unique
contribution to deliver amazing results for all
We redefine engineering by thinking boldly, proudly
and differently

10
Attracting the Best Talent in the Industry
SNC-LAVALIN ATTRACTS THE BEST
TALENT IN THE INDUSTRY
› Track record, brand and organizational
purpose are key
› Committed to providing the best employee
experience
› Regional graduate & apprentice
programmes
› Industry-leading employee engagement
level
› Compensation based on a 30:70 ratio of
values and personal performance to
financial results
VOX survey – engagement increased + 5%
to 85% through COVID-19
EQUALITY, DIVERSITY & INCLUSION
Programmes, milestones/accomplishments
› Our employees speak ~70 languages
and represent 130 nationalities
› Target to increase female representation
in leadership positions to 25% by 2025
› Launching our new global ED&I
programme “Different makes a
Difference” in October
› Employee self-generated ED&I networks
cover Gender, Disability, Neurodiversity
Ethnicity, Black Americans, Generational
Diversity, Faith, Parenting / Carers,
LGBTQ+
Recruiting and retaining the best talent to deliver the best service to our clients
DEVELOPMENT
Delivering world-class professional,
managerial and leadership training and
development programmes globally
ETHICS
Recognized achievement of best-in-
class ethical standards (2021
Ethisphere Compliance Leader
Certification)

11
Successfully winding down our LSTK backlog with diligent risk management procedures
Regular C-Suite
project and business
reviews
Risk Appetite
Statement established
Strengthened
Commercial and Legal
oversight / support
Oversight Function
established providing
strong governance
Strengthened
Enterprise Risk
Management
Prudent approach to
report potential project
out-turns
> Improved predictability
> Consistent performance
> Improved profitability and
cashflows
> Improved transparency
> Independent governance and
Information
> Significant de-risking of the
business
> Improved understanding of
issues at corporate level
BENEFITS/OUTCOM ES
Stronger risk management procedures
Risk Oversight / Management
Jean Lesage Intl
Airport Expansion,
Quebec,
Canada
Reseau Électrique
Métropolitain (REM)
Quebec,
Canada
Thames Water
Reading,UK

12
Our Transformation Journey
Total Shareholder Return of 46% vs 33% for TSX1 since announcement of new strategic direction
July 2019
Announced new
strategic direction February 2020Jeff Bell appointed
CFO
October 2019Ian Edwards
appointed
CEO
July 2020Announced
Resources Business
Transformation
February 2021Announced provision
of legacy risk
June 2021EDPM backlog
achieves record
high
September 2021Announced new
organizational
structure to drive
growth
Ceased
bidding on
new LSTK
work
LSTK BACKLOG REDUCED FROM
$3.4B to $1.4BFROM JULY 2019 UNTIL JUNE 2021
ORGANIZATION REFOCUSED ON:
De-risking delivery of LSTK projects
Integrating capability in SNCL Services across
our core geographies
ENGINEERING SERVICES
Achieving record high EDPM backlog
Delivering on our goal of consistent profitability
and cash flows
Investing in digital innovation
and global capability
HEAVY LIFTING TO FIX AND STRENGHTEN
Exiting 15 non-core geographies
Divesting non-core businesses: Valerus,
European Fertilizer and South Africa
Launching transformation of cost base
to fit ‘go forward’ business
August 2021Closing of
Resources O&G
business sale
December 2019Settlement of
federal charges
June 2019Ian Edwards
appointed interim
CEO
1. Source: Bloomberg (assuming dividends are reinvested) covering the period from July 22, 2019 until August 30, 2021

13
Strategically Engineering Our Future
WHERE WE PLAYStrongly positioned with a leading
presence across Canada, the U.S.
and the UK, as well as targeted
operations in Europe, the Middle
East, Asia-Pacific and Latin America;
primary focus on built and natural
environment across seven clearly
defined end markets
HOW WE WIN Deploying global capabilities locally
to our clients and delivering unique
end-to-end services across the
whole life cycle of an asset, by
connecting people, data and technology
to meet the demands of the future
HOW WE GROW TO CREATE LONG-TERM VALUE
Leveraging the depth of our capabilities in strong, growing markets
consistently, delivering high quality services to our customers and
investing in organic and inorganic growth opportunities
One
SNC-Lavalin
Strategy

14
Serving Diversified End Markets with Focused Capabilities
~75%2020 Revenue
L E A D I N G
P R E S E N C E
( C A N A D A , U . S . , U K )
~25%2020 Revenue
T A R G E T E D
O P E R AT I O N S
( E U R O P E , M I D D L E
E A S T, A PA C A N D
L AT A M )
Transportation Buildings &
Places
Defence Water Industrial & Mining Power &
Renewables
Nuclear
MARKET LEADER
› UK Water Infrastructure
› UK Transport Infrastructure
› Canada Transport Infrastructure
› Canada Power and Renewables
› Canada Nuclear Technology
(CANDU)
› U.S. Nuclear Decommissioning
and Waste Management
GLOBAL CAPABILITIES

15
Fully Integrated Professional Services and Project Management Company
Well-positioned to drive growth with industry leading end-to-end capabilities
C O M PAN Y AN D F I N AN C I AL S TATS
H E A D Q U A R T E R S
Montreal, Canada
F O U N D E D
1911
2 0 2 0
T O T A L R E V E N U E
$7.0B
2 0 2 0
B A C K L O G
$13.2B
T O T A L
E M P L O Y E E S 2
~31,000
R E V E N U E ( H 1 2 0 2 1 )
B Y S E G M E N T
B AC K L O G ( A S AT J U N E 3 0 , 2 0 2 1 )
B Y R E G I O N
32%
17%30%
7%
14%
UK
Canada
U.S.
Europe
M A R K E T
C A P 1
$6.1B
C O U N T R I E S
S E R V E D
50
Other
59%13%
13%
8%7%
1%
LSTK projects
Capital
Engineering
Services
Nuclear
1. As at August 30, 2021 2. Excluding employees from the O&G business, for which the sale was completed in Q3 2021
Linxon
O&M
28%
6%
12%8%
45%
1%
LSTK projects
Capital
Engineering
Services
Nuclear
Linxon
O&M

16
NET ZERO CARBON 2030
Set annual targets, externally verified, with
annual updates published via the Carbon
Disclosure Project
Detailed routemap - key actions:
› Prioritizing low carbon real estate
› New travel policy
› Behavioural change across our
operations to increase digitalization
› Developing electric vehicle leasing /
rental with global travel providers
› Energy purchase contracts prioritizing
low and zero-carbon energy sources
› Interim targets on the path to 2030
CORPORATE SOCIAL RESPONSIBILITY
› Progressive Aboriginal Relations (PAR) Programme
› Local Resources Development Initiative (LRDI)
› Increase local workforce employability
› Encourage enterprise development
› Strengthen local supply chain
› Corporate Sponsorship & Donations
› Contribute to charities that support: Education,
Science, Vulnerable communities, Arts & Culture
› Corporate Volunteer Programme
› Includes time, funds, technology and In-kind
contributions
12 Key ESG targets and
commitments to align with
SNC-Lavalin’s commitment to
the UN Global Compact
Energy, water and raw materials
consumption, transport,
environmental pollution, health &
wellbeing, climate, biodiversity,
diversity, community, integrity
and human rights
›Socially and Environmentally Responsible
UN GLOBAL COMPACT
Workforce health and safety focus
› Pandemic resilience
› Mental and physical wellbeing
› Physiological safety
› Culture of ownership and no blame
› Clear HSE performance targets

17
Our ESG Journey
Created our
2030 Net Zero
Target routemapSigned UN
Sustainability
Initiative 2019
30%
of WOMEN across
the organization
Designated
3 UN SDGs1
ACCOMPLISHMENTS OBJECTIVES
25%of WOMEN among
senior leadership team
Maintain 30% of
board represented
by women
Reduce Scope 1, 2 and
3 GHG2 emissions by
60% by 2025
Increase use of
virtual realityfor site visits
Transition all existing
offices and facilities to
low carbon
alternatives
33% of women across
the organization
by 2025
Published
Engineering Net
Zero reports for
CA & UK
1. Sustainable Development Goals 2. Greenhouse Gas

18
Services
Operations & Maintenance
(O&M)
Capital
Capital
✓
S E G M E N TS 1
Linxon
Intelligent
Networks &
Cybersecurity
✓
How We Win
Nuclear
Procurement
✓
✓
✓
Operations &
Maintenance
(O&M)
✓
✓
Project &
Construction
Management
✓
✓
✓
Decommissioning
✓
✓
Design &
Engineering
✓
✓
✓
Consulting,
Advisory &
Environmental
Services
✓
✓
EN D - TO- EN D SERVIC ES C APAB IL IT IES
Engineering Services
✓
1. These represent the new reportable segments which will be effective on January 1, 2022, excluding the LSTK projects segment. See slide 102.

19
Leveraging Our Capabilities Across Attractive Markets and Geographies
One SNC-Lavalin approach differentiates our strategy
GLOBAL MEGA TRENDS
› Government commitment to
address aging infrastructure
in three main geographies
› Net Zero targets and
decarbonization efforts in
the UK and Canada with
emerging focus in the U.S.
› Industry ripe for disruption
and innovation
OUR UNIQUE CAPABILITIES
› Delivering end-to-end services
across all life cycle of an asset
› Established global leader in
infrastructure development
› Decades of pioneering the build-out
of low carbon electricity production
in Hydro, Nuclear and Energy
Transmission
› Substantial investment in digital
capabilities, technology, robotic
tooling solutions
GROWTH
› Well-positioned to capitalize
on infrastructure spending as
a partner of choice
› Ability to leverage unique
capabilities to address
rapidly increasing demand
for decarbonization and
Net Zero design
› Developing new opportunities
and enhancing current
processes through digital
integration

20
How We Grow to Create Long-Term Value
Well-positioned for organic growth in strong markets
Greater FCF* to deploy toward
strategic bolt-on acquisitions
Great set of capabilities to drive growth
*Non-IFRS financial measures. See the cautionary statement regarding Non-IFRS financial measures at slide 3.

21
Growing and Creating Value by Investing in Organic Growth
In a position to reinvest FCF* into strategic growth initiatives
Digital Transformation
› Pioneering new data driven
approaches for the delivery of design
across SNC-Lavalin to increase
predictability of construction
› Enhancing our programme
management delivery through data
driven decision making to lower risk
› Developing digital twin solutions to
improve certainty and whole life
value of assets
K EY GR OW TH AR EAS
Engineering Services
U.S. Expansion
› Increased infrastructure
spending
› Proven ability to extend
our brand into new
markets
› Incremental growth
opportunities through
whitespace acquisitions
Major Programmes
› Opportunity to leverage our
unique end-to-end design
and delivery capabilities
› Risk-capped collaborative
contracting relationships
› Major competitive
differentiator and growth
opportunity in Canada
Nuclear Decommissioning
and Waste Management
› Strong demand in U.S.
and UK
› Leading reputation as a
responsible partner continues
to drive growth
› Substantial opportunities
as governments and public
sector clients focus on
waste management
*Non-IFRS financial measures. See the cautionary statement regarding Non-IFRS financial measures at slide 3.

22
1. U.S., UK and Canada 2. Transportation, Buildings & Places, Defence, Water, Industrial & Mining, Power & Renewable, Nuclear
Strategic Bolt-on Acquisitions to
Fuel Inorganic Growth
Accelerate our strategy through bolt-on acquisitions in highly attractive and profitable end markets
ST RAT EGIC F ILT ERS
Primarily core
regions1 and
end markets2
Bolt-on /
white space
opportunities
Expands
capabilities
Aligned
with overall
growth strategy

23
Financial Targets and Capital Allocation Priorities (2022-2024)1
*Non-IFRS financial measures. Refer to Section 9 of the Company’s Q2 2021 MD&A for Non-IFRS financial measures definition and reconciliation to IFRS measures. See also the cautionary statement regarding Non-IFRS financial measures at slide 3.
**Non-IFRS financial measures. See the cautionary statement regarding Non-IFRS financial measures at slide 3 and slide 101.
1. Reference is made to the Company's press release dated September 28, 2021, for details of the limitations of and assumptions underlying these financial targets. 2. Excluding the Federal charges settlement of $56M per year (2022-2024)
Capital Allocation Priorities
› Improve debt leverage to
achieve investment grade
› Prioritize positive FCF** to
accelerate the strategy
through organic and
inorganic investment
› Opportunistically return capital
to shareholders through
buybacks when there is a lack
of attractive bolt-on acquisitions
opportunities
O R G AN I C
R E V E N U E
G R O WTH
4-6%
S E G M E N T
AD J U S TE D
E B I T TO
S E G M E N T
R E V E N U E R ATI O *
8-10%
F C F * * O V E R
C O N S O L I D ATE D
AD J . N E T I N C O M E
C O N V E R S I O N
80-90%2
S N C L S E RV I C E S
( AN N U AL LY)
C O N S O L I D ATE D
( B Y E N D O F 2 0 2 4 )
N E T L I M ITE D
R E C O U R S E &
R E C O U R S E D E B T
TO C O N S O L I DATE D
AD J . E B I TD A*
1.5-2.0x

24
Key Takeaways
Strongly positioned with a
leading presence across
Canada, the U.S. and the UK, as
well as targeted operations where
markets are strongly supported by
aging infrastructure demand and
government commitment.
Deploying global capabilities locally
to our clients and delivering unique
end-to-end services across the
whole life cycle of an asset and
leveraging our capabilities to meet the
demands of the future for our clients
in decarbonization and sustainable
solutions.
Creating value through the
breadth and depth of our
capabilities, consistently delivering
high quality services to our
customers, and executing a clear
investment plan that will enable
enhanced financial performance.
1 2 3


26
Key Messages | Engineering Services
1
2
3
5
Substantial depth and breadth of services in Engineering & Design, Projects &
Programme Management and Consultancy & Advisory Services
Strong global reputation provides a foundation for growth
Global Market Networks and Global Practices align and optimize our capabilities and
deliver best-in-class services
Well-positioned to accelerate Engineering Net Zero and grow market share
as clients embrace sustainability goals
4 Targeted investments in digital technology to transform the way assets are designed
and delivered

27
Engineering Services | Delivering Local Services on a Global Scale
R E V E N U E S E G M E N TATI O N 2
C L I E N T T Y P E
38%
31%
20%
10%
S E R V I C E L I N E
45%
21%
10%
10%
9%
3%
M A R K E T
1. Global Technology Centre – highly-skilled resources providing technical capabilities for global operations and project delivery 2. Based on H1 2021 figures
R E V E N U E AN D E M P L O YE ES B Y R E G I O N
Design
Consultancy
Project & Programme
Management
Other
Transportation
Buildings & Places
Defence
Water
Industrial & Mining
Renewable Energy
Other
U N IT E D S T AT E S
3.1K employees
$1.0B
U K & E U R OP E
9.4K employees
$1.8B
MID D LE
E AS T
2.1K employees
$0.4B
AS IA P AC IFIC
1.3K employees
$0.2B
C AN AD A
4.0K employees
$0.6B
IN D IA
2.0K employees
GT C 1
23K employees (as a t Aug. 31 ‘21)
$4 .2B R ev enue (2020)
23,000+ employees building strong relationships with clients
Record $3.6B backlog as of June 30, 2021
Public
Private
71%
29%
LAT AM
1.3K employees
< $0.1B

28
Delivering world class projects across 6 key end markets
Transportation Defence
Buildings &
Places
Water Power &
Renewables
Industrial &
Mining
John Hart Generating Station
British Columbia, Canada
Beckton Waste-Water Treatment Works
London, UK
Medicago Production Facility
Quebec City, Canada
Confidential Client Cyber Risk Assessment
Confidential Location
London 2012 Olympics
London, UK
Defence
Project NEON Urban Freeway Improvements
Nevada, USA
Transportation Defence

29
UK & E U R O P E $660M
Canada:
Greater Toronto Area
USA:
Biden
Infrastructure Bill KSA:
NEOM
UK: major projects
including HS2, East
West Rail and Lower
Thames Crossing
Total Prospect Pipeline*
(incl. 3+ years)
>$30BAustralia:
Increased
urbanisation in Sydney
and Melbourne
P R OS P E C T P I P E L I N E * ( $ B)
2.32.8
2.5
1.2
1.41.6
0.8
0.60.4
0.90.4
0.20.3 0.3
0.3
Oct21-Sep22 Oct22-Sep23 Oct23-Sep24
5.0
5.65.7
USAUK&E LATAMMECanada APAC
A Solid Pipeline to Underpin Future Engineering Services Performance
* Represents the Company’s estimation of the value of total identified prospects

30
Sustainable Competitive Advantages that Drive Growth
Comprehensive end-to-
end capabilities span all
aspects of project lifecycle and
differentiate our offerings
Leadership driven by a
collaborative culture with
significant industry experience
and deep expertise
Market-leading Global
Technology Centre in
India enables us to accelerate
digital adoption and enhances
our value proposition
Reputation for high-quality
engineering services
and deep, longstanding
relationships enable high
win rates in existing markets
1 3 42
Significant scale in
energy and power as
the world shifts toward
more sustainable
infrastructure
5Established leadership in
project lifecycle design as asset owners move toward
more comprehensive long-term
cost focus
6Focus on combining
expansive database of design and O&M metrics
with digital capabilities to drive value
7

31
Strategically Engineering Our Future
WHERE WE PLAY
Strongly positioned with a leading
presence across Canada, the U.S.
and the UK, as well as targeted
operations in Europe, the Middle
East, Asia-Pacific and Latin America;
with a primary focus on built and
natural environment across seven
clearly defined end markets
HOW WE WIN
Deploying global capabilities locally
to our clients and delivering unique
end-to-end services across the whole
life cycle of an asset, by connecting
people, data and technology to meet
the demands of the future
HOW WE GROW TO CREATE LONG-TERM VALUE
Leveraging the depth of our capabilities in strong, growing
markets consistently delivering high quality services to our
customers and investing in organic and inorganic opportunities
One
SNC-Lavalin
Strategy

32
Qiddiya Six Flags Theme Park
King Salman Park Foundation
East West Rail
Engineering Services Snapshot (CA, UK&E, ME)K E Y P R O J E C TS
Canada Line
REM
East West Rail (UK)Project Management, Design
Delivery, Consents and Planning
Permissions, Risk Management,
Project Controls, Signalling
Construction, System Assurance
and Environment & Ecology
King Salman Park
(Kingdom of Saudi Arabia)Project management and
supervision consultancy
BC Hydro – Site C (CA)Detailed design, resident
engineering services, and
engineering management
MOD Engineering Delivery Partner (UK)Engineering and technical support to the
acquisition and on-going operation of UK military
equipment and systems
BC Hydro
BACKLOG
( AS AT JUNE 30, 2021)
$2.4B
Darwen Wastewater
Treatment Works
MOD

33
UK Client Partnership Focus Drives Value
Long-term client relationships deliver recurring revenue
Customer Name Type of Engagement Start of Engagement
Network Rail Rail engineering consultancy/design and signaling design & installation 1995
MoD (including AWE,
Babcock, DIO)
Project management, engineering consultancy/design and business change related
consultancy1990
EWR AllianceMember of project delivery alliance with responsibility for multi-disciplinary design
and design management of Phase 2 of rail project 2016
Thames WaterDiscipline engineering, asset management water resource planning, and
environmental assessment consultancy. Design for design and build delivery.1989
HS2Engineering Delivery Partner [and since 2020 Commercial Delivery and Controls
Partner] providing engineering, commercial and project management services and
resources
2012
~80%
TOTAL SALES WIN RATE1,2
KEY ACCOUNT PERFORMANCE SUMMARY
~$510M
ANNUAL TOTAL REVENUE (2020)1
1. Represents the selected 5 clients listed on this slide
2. From January 1 2021 to July 31 2021

34
Canada Client Focus Drives Value
Long-term client relationships deliver recurring revenue
Customer Name Type of Engagement Start of Engagement
Ministère des Transports du Québec
Various services including Consulting, Environment and
Geotechnical services, Design, Engineering, Project
Management and Construction Management services
1960
Société de Transport de Montréal 1991
Metrolinx 1991
Ville de Montréal 1967
BC Hydro 1974
~60%
TOTAL SALES WIN RATE 1,2
KEY ACCOUNT PERFORMANCE SUMMARY
~$120M
ANNUAL TOTAL REVENUE (2020)1
1. Represents selected 5 clients listed on slide
2. From January 1 2021 to August 31 2021

35
GROWING VOLUME WITH CUSTOMERS THROUGH END-TO-END SERVICESDeveloped original business case for HS2 and updated it in 2008
Demand modelling, delivery strategy and BIM strategy for HS2
Preliminary design and
environmental consultancy
roles covering 70% of the
phase 1 route
Rolling stock technical advisor for phases 1 and 2a, re-secured for all phases in 2021
Engineering delivery partner for phases 1 and 2a
Commercial delivery partner (project controls and cost estimation) for phases 1 and 2a
2000-
2008
2012-
2015
2012-
20172015-
20212016-
2028
2020-
2028
Collaborative Contracting Case Study: High Speed 2 (HS2) Project
PROJECT DESCRIPTION
› ~$150B project delivers the first
high speed railway in the UK,
linking up London, the Midlands,
the North and Scotland
› Serving over 25 stations, including
8 of Britain’s 10 largest cities and
connecting around 30M people
› Phase 2b and the high-speed rail
link to Scotland beyond Crewe are
subject to further approvals
SNC-LAVALIN SOLUTION
› Developed and grew relationship with client since
2001 to a $60M+ revenue in 2020
› Developed technical standards for off-site build design
of bridges and viaducts to line speeds of 250 mph
› Over 2,000 staff deployed on HS2 since 2016
› In 2020, supported HS2 in becoming the first UK
Transport Sector client to achieve accreditation for
its carbon management system
Our journey with HS2 has taken us from professional services provider to strategic partner

36
Track Record of Successful Bolt-on Acquisitions
Strategic, bolt-on acquisitions to be considered going forward
Confluence Project
Management Pte. Ltd.
October 2010
3,500
Tampa, FL
Transformational U.S.
market entry and a key
step to being a global
engineering consultancy
October 2013
200
Singapore
Bolt-on acquisition in
strategic geographies as
part of expansion of project
management capability
November 2014
62
Oslo
Norwegian market entry with
project management capability
November 2017
70
Orlando, FL
Significant step in the
execution of our digital asset
management strategy
Improve our scale in well-funded
U.S. infrastructure market
ACQUISITION
CLOSE
# OF EMPLOYEES
HQ LOCATION
ACQUISITION
IMPACT/MARKET
CAPABILITIES

37
A Culture of Continuous Improvement
and Collaboration
1. Company’s Vox 2021 survey results
Established reputation and culture of SNC-Lavalin attracts top talent
› 88% of staff are proud to work for SNC-Lavalin and 85% would recommend
as an employer1
We value and recognize technical excellence
› Over 23,000 qualified staff delivering for clients
› Over 600 graduates hired in 2020
› Global Practice communities drive collaboration and connectivity to bring
value to our clients
Continued investment in skills and capability
› Over 10,000 staff have undertaken digital skills training in the last 12 months –
harnessing data and technology and use of our Global Technology Centre
› Suite of world-class leadership programmes (e.g., Executive Leadership
Programme with Saïd Business School, Oxford) delivers high performance culture
We aim to be the employer of choice in our sector and champion diversity,
inclusion and wellbeing, as recognized through various awards

38
OUR CREDENTIALS
Provide technical delivery
services including design,
identification of
decarbonization interventions
and priorities, as well as
programme and supply chain
management
UK Government Property Agency –
Net Zero Programme
First of a kind, low carbon
gas turbine technology.
Projects in UK and U.S. with
further opportunities as
global engineer on diverse
Carbon Capture & Storage
and Hydrogen projects
8 Rivers – Projects Broadwing & Whitetail
European Investment Bank (EIB) – Sustainable
Infrastructure Programmes
Research to inform EIB’s
Climate Bank Roadmap that
will guide €1T of investments
by 2030
Developed a data driven
model, coupled with Google
Cloud computing power, to
assess individual structure
flood risk in relation to flood
insurance rates across all 50
states & six territories of the
U.S. for 90M structures
US Federal Emergency Management Agency –
FEMA
Buildings & Cities Energy
Resilience Transportation
›As a leader in the design and delivery of the built environment, SNC-Lavalin has
a unique role to play in influencing what gets built, and how new technologies and
methods can be used to create and operate infrastructure assets, while minimizing
the impacts they have on society
We are committing to proactively shaping our client’s decisions and approach,
placing Engineering Net Zero at their core
Engineering Net Zero is at the Heart of Our Business
Our end-to-end service offering, underpinned by climate resilience & whole life carbon management
THE SCALE OF THE OPPORTUNITY
Energy supply and decarbonization of infrastructure
are our most significant growth opportunities
Energy: Over the next 3 decades well over $125T is required in clean energy investment1
› Nuclear $50B, Renewables $550B2
Buildings: a large proportion of the total global building
stock that will exist by the 2050 net zero deadlines
has already been built; 80% in the UK3
› Global Net Zero Buildings opportunity (retrofit of non-residential) of $850M over the next 4 years
(assuming 6% market penetration)4
OUR OFFERING
1.International Energy Agency, Net Zero by 2050: A Roadmap for the Global Energy Sector (2021)
2.International Energy Agency, Net Zero by 2050: A Roadmap for the Global Energy Sector (2021): ‘Sustainable Development Scenario 2015 – 2030’
3.UK Green Buildings Council, UKGBC responds to CCC housing report (2019)
4.International Energy Agency, Energy Efficiency Indicators (2020). CA$ 850M assumes a 6% market penetration for SNC-Lavalin for the global non-residential market over 4 years

39
OUR CREDENTIALS
Collaborative contracting and
delivery partnership. Flagship
for digital delivery leveraging
automation, reuse,
standardization, and digital
rehearsal. Budget reduced
by 19%
Routes to Market,
United Kingdom
Currently mobilising for
programme controls on one
of Riyadh’s four grand
projects. Leveraging
programme accelerator
methodology and advanced
analytics capability
King Salman Park,
Kingdom of Saudi Arabia
Design
Production System
Development of a product
to optimize design delivery
for improved connectivity
across the design and
construction phases
Strategic advisory services to
design and develop a digital
twin for a 16km rail
extension. Blueprint for
broader rail industry with
focus on optimizing O&M
performance. Est. $45M
operational savings
Canada Line,
Canada
Design Transformation Programme Management
Digital Twin Data Ecosystem
›As a leader in the design and delivery of the built environment, SNC-Lavalin has a unique role
to play in influencing what gets built, and how new technologies and methods can be used to
create and operate infrastructure assets, while minimizing the impacts, they have on society
We are embracing digital to bring unrivalled certainty to delivery and improved whole life value
for the assets we design, build and operate for our clients
Leading Industry Transformation by Combining
People, Technology and Data
The potential to transform infrastructure
delivery is significant with a new pipeline
of opportunities* in two of our focus areas:
OUR FOCUS
Design Transformation
Programme Management
Data Ecosystem
Digital Twin
1
2
3
4
OUR POTENTIAL
$1.3B
Programme
Management
$0.5B
Digital
Twin
Global infrastructure and services to connect and create value from data at scale
Connecting virtual and physical worlds for improved decision making and whole life asset value
A global service underpinned by advanced analytics for improved predictability of outcomes
A collaborative, data driven approach to design for improved quality and certainty of delivery
* Represents the Company’s estimation of the value of total identified opportunities

40
Addressing Market Needs with Focused Solutions
Leading reputation in design and delivery of assets is a launching pad for future global growth
M AR K E T D YN AM I C S N C - L AVAL I N AD VAN TAG E
› Public and private UK infrastructure investment
forecast to be nearly £650B to 20301 and Canada
infrastructure deficit in the range of $110-270B CAD2
› Strong momentum in decarbonization and
Net Zero trends
› Shift in contracting models to collaborative,
risk-balanced approach
› Clients are demanding greater use of technology
and data to improve on time and on budget delivery
› Established relationship with key government
clients positions SNC-Lavalin to drive
above-market growth
› Reputation and pioneering capabilities in
sustainable design have enabled early wins,
such as the Government Property Agency (GPA)
Net Zero and Life Cycle Replacement
› Ability to leverage our leading capabilities in
construction and asset delivery to create growth
from Transformational Programmes
› Digital transformation programme targeting
end-to-end delivery. Upskilling our people to
pioneer the change.
1. Infrastructure and Projects Authority (IPA), Infrastructure and Construction pipeline (2021)
2. Boston Consulting Group (2017)

41

4242
BACKLOG
(AS AT JUNE 30, 2021)
$1.2B
Florida Department of Transportation (FDOT)
Federal Emergency Management Agency (FEMA)
U.S. Army Corps of Engineers (USACE)
Colorado Department of Transportation (CDOT)
Central Texas Regional Mobility Authority (CTRMA)
Intel
Texas Department of Transportation (TxDOT)
City & Countyof Denver
Cobb County
Georgia Department of Transportation (GDOT)
Tung Chung Line (MTR
Corporation)
Sydney Metro
Inland Rail
Programme
Engineering Services Snapshot (U.S., Asia, Australia, M&M)K E Y P R O J E C TS AN D C U S TO M E R S
FDOT (US)General engineering consultant
services focusing on service,
responsiveness, and
innovation
Sydney Metro
(Australia)Integration and Delivery
Partner for Australia’s
largest public transport
project
US Army Corp of Engineers (USACE)Delivering for USACE at home and abroad

43
• Linxon is a company built on 100 years of technology expertise, and 60 years of
substation experience worldwide
• We combine Hitachi ABB Power Grids' deep technological knowledge and SNC-
Lavalin's project management expertise. Shareholder structure 51% SNC-Lavalin / 49%
Hitachi ABB Power Grids
• Linxon offers engineering, procurement, management and construction services for
large AC power substations in various segments – Renewable & Conventional Power
Generation, Transportation, Transmission Grids, Data Centers and Battery Energy
Storage
• Going for growth by building crucial infrastructure to reach net carbon zero targets
.
Leading Expertise in Substation Engineering MARKETS AND DRIVERS
• Organic growth >30% over last 2 years
• Backlog of $800M USD
• $14B USD addressable market
• Booming market – driven by addition of
renewable power and its integration to the
electrical grid
• Average project size: $20M to $50M USD
• Repeatable business with manageable
complexity
• Leveraging Hitachi ABB Power Grids products
• Over 50 projects awarded since September 1,
2018 with a value of $1.2B USD
• 600 employees across 3 global hubs

44
Why the U.S.? The Market
The U.S. is a very large and attractive market poised for growth
› $1T USD additional infrastructure package
voted at Senate2
› Additional $550B USD in infrastructure spending3
› State and local clients developing long-term,
lifetime cost approach to contracting
1. ASCE Infrastructure Report Card (2021)
2. US Senate website (August 10, 2021)
3. 2021 Bipartisan Infrastructure Investment and Job Acts
SIZ E › $5T USD infrastructure gap1World’s largest INFRA Market
GR OW TH Covid recovery stimulus
CLIENTS Value delivery and technical quality
R ETU R N S High profit and cash, low risk › Public sector clients are typically fair
and pay promptly

45
Why the U.S.? We Have Proven We Can Grow in the U.S.
Global leading reputation in design and delivery of assets has already created strong U.S. growth
› Market subject to the same macro trends
that we are benefitting from across the world.
Enhanced focus on climate change
› Present in only a fraction of end markets
and States
POSIT ION
› ENR ranking 17
› 3,100 employees1 with revenues2 of $1.0B
› >6,000 ongoing projects from >900 clientsStrong reputation, critical mass
M EGA T R EN D S
SHARE Low share of fragmented market
TRACK RECORD Our approach works › Proven organic growth. We are local market
leaders in areas we have focused on
Digital, decarbonization, partnering
1. As at August 31, 2021
2. For the period covering the full-year 2020

46
How Do We Win? Organic Growth Playbook
Leveraging success in developing and expanding relationships to drive further growth
STRATEGICALLY INVEST
1
DEVELOP TARGETED
RELATIONSHIPS
2
WIN BUSINESS
3
DELIVER SUCCESSFULLY
4
ESTABLISH TRACK RECORD
5
LEVERAGE OUR CAPABILITIES TO DRIVE FURTHER
EXPANSION
6

47
Organic Growth through “Land and Expand” Strategy
Proven ability to build market leading client relationships
~65%
TOTAL SALES WIN RATE2,3
KEY ACCOUNT PERFORMANCE SUMMARY
Customer Name Type of Engagement
Start of
Engagement
5-Year Revenue
growth1
Florida Department of Transportation
Various services including General Engineering
Consulting, Planning, Environmental, Right of
Way services, Design and Project
Management and Construction Management
services
1960 53%
Texas Department of Transportation 1971 68%
Georgia Department of Transportation 1973 199%
Colorado Department of Transportation 1996 68%
Federal Emergency Management AgencyProgramme Management, Floodplain Mapping
and Mitigation, and Disaster Recovery services1999 93%
1. For the period from January 1, 2016 to December 31, 2020
2. Represent selected 5 clients listed on slide
3. For the year-to-date period from January 1, 2021 to July 31, 2021
~$360M CAD
ANNUAL TOTAL REVENUE (2020)2

48
CASE STUDY: Helping FEMA Advance Nationwide Disaster Resiliency
Evolution from technical provider to trusted partner
INDUSTRY NEED
› Help communities prepare for,
respond to and recover from
natural and manmade disasters
› Provide reliable and accessible
flood risk data & analysis
› Conduct post-disaster building
performance analysis
SNC-LAVALIN SOLUTION
› Innovation with cutting-edge solutions to
“old” problem sets
› “FEMA First” strategy to further solidify
SNC-Lavalin as FEMA trusted provider
› Evolve the Risk MAP programme
to digital mapping and modeling products
OUTCOME
› SNC-Lavalin as the Managing Partner of the STARR II JV won the Region 3 FEMA
Production and Technical Services (PTS) re-compete contract ($300M USD 5-year
framework contract)
› SNC-Lavalin Small Business Administration’s Mentor-Protégé JV won the new single-
award nationwide FEMA MT-2 contract ($97M USD 5-year framework contract)

49
FEMA CASE STUDY: How Did We Win?
Success through combining deep capability and strong client focus
WINNING CAPABILITIES
• Water Resources River and Coastal Engineering
• Geographical Information Systems (GIS)
• Environmental Scientists
• Geographers
• Data scientists
• Communications Specialists
• Mathematicians - Probabilistic Analysis
• Actuarial Specialists
• Programme Management
• Structural Engineering
• Mechanical Engineering
• Electrical Engineering
• Fire Engineering
• Architecture
• Planning (Mitigation Planners
• Geotechnical Engineer
CLIENT FOCUSED PROPOSITION
• Digital transformation proposal
• Flexible approach
• Reduced administration required by client
• Compelling transition plan
• Strong trusted team
• Delivery process innovation
• Identifying risks to the programme outside the
scope and proposing solutions
• Data management approach
• Programme knowledge
• Stakeholder management plan
• Partnerships with small businesses
• Recognition of insurance issues
• Proposed approach to training
• Depth of hydrogeologic models
• Alluvial expertise
• AICP Software expertise

50
Track Record of Successful Organic Growth
2017 2020 2017 2020
R EVEN U E
IN THE U .S . ( $B CAD)
SEGM EN T AD J. EB IT TO
SEGM ENT REVENUE RATIO*
IN TH E U .S . ( %)
*Non-IFRS financial measures. Refer to Section 9 of the Company’s Q2 2021 MD&A for Non-IFRS financial measures definition and reconciliation to IFRS measures. See also the cautionary statement regarding Non-IFRS financial measures at slide 3.

51
U.S. Market Growth through White Space Opportunities
EXPANDING
SPACESeattle
New York City
Los Angeles
FUTURE
EXPANSIONChicago (Midwest)
Mid Atlantic
EXISTING
HUBS

52
Opportunity to Accelerate Growth –
Adding Value Through Acquisition
Clear acquisition targets available and confidence our approach means we can add value
› Fragmented U.S. market ripe for disruption
› Robust pipeline of attractive bolt-on acquisition candidates in key white space areas
› Targets in the market typically have attractive financial profiles with strong margins and growth prospects
› Ability to bring our leading, global end-to-end capabilities into the market through bolt-on acquisitions
› Collaborative culture with high-employee satisfaction and talent attraction position SNC-Lavalin as a strong M&A partner
› Focused on strategic acquisitions with clear synergies to accelerate growth
Billie Jean King National Tennis Center
New York (US)


54
Engineering Services | Measuring Success through Clear KPIs
Continuing to deliver high margins and strong cash flow in Engineering Services
$4.2B2020 REVENUE
$3.6BBACKLOG
(As of June 30, 2021)
11.0%BACKLOG GROWTH
(OVER PAST 2 YRS.)1
4-6%ORGANIC
REVENUE GROWTH
TARGET
8-10%SEGMENT ADJ. EBIT
TO SEGMENT
REVENUE RATIO*
TARGET
1. Covering 2-year period from June 30, 2019 to June 30, 2021
*Non-IFRS financial measures. Refer to Section 9 of the Company’s Q2 2021 MD&A for Non-IFRS financial measures definition and reconciliation to IFRS measures. See also the cautionary statement regarding Non-IFRS financial measures at slide 3.
14-16%SEGMENT ADJ. EBITDA
TO SEGMENT NET
REVENUE RATIO*
TARGET
TARGETS 2022 -2024
(ANNUALLY)

55
Key Takeaways | Engineering Services
1
Substantial depth
and breadth of services
in Consultancy & Advisory
Services, Engineering &
Design and Projects &
Programme Management
2
Strong global
reputation provides
a foundation for
strategic growth
3
Global market
networks and
global practices
align and optimize
our capabilities
and deliver best-in-
class services
4
Targeted
investments in
digital technology
to transform the way
assets are designed
and delivered
5
Well-positioned
to accelerate
Engineering
Net Zero and grow
market share as
clients strive toward
sustainability goals

56

57

58

59
Key Messages | O&M
4 Develop long-term partnerships with clients to deliver carbon and energy
reduction programmesCO2
3 Targeting attractive P3 (Public Private Partnership) and related opportunities in
Canada, U.S. and UK
2 Opportunity to participate in outsourced O&M market and further penetrate the in-house
market through integrated asset and data management offerings, and digital innovation
1 Integrated One SNC-Lavalin Strategy, leveraging Engineering Services and Capital,
provides pathways to target revenue growth opportunities
5 Strategically aligned with Capital to focus on long-term contracting models that produce
stable cash flows and stakeholder value

60
O&M Snapshot
~900 employees dedicated to delivering high-quality O&M services
63%
22%
15%
BACKLOG (As at June 30 th, 2021)
22%
41%
37%
2020 REVENUE Transportation
› Highways and bridges
› Light rail transit systems
Facilities & Defence
› Full service of private and public social
infrastructure and commercial property
› Integrated services for a fleet of minor
warships and auxiliary vessels
Industrial
› Gas-fired power
› Water desalination
› Cogeneration power
› Hydroelectric power
■ Transportation
■ Facilities & Defence
■ Industrial
Operating Segments
■ Transportation
■ Facilities & Defence
■ Industrial
$5.8B$464M

61
Leveraging Decades of Expertise with New Strategic Direction for
Profitable Growth
1994 SNC-Lavalin
O&M begins as
ProFac Inc.,
acquired in 1997
by SNC-Lavalin
O&M strategy aligned
with new SNC-Lavalin
strategic direction;
began reestablishing
relationships with
contractors
2009 - 2016 SNC-Lavalin
O&M focused on facilities
and asset maintenance for
government and defence;
expands into large
integrated FM1/property
management portfolios;
adds several P3 contracts
2016 SNC-Lavalin O&M sells
Canadian FM1 (non-P3) business
and 19 French regional airport
management contracts
2017 Acquisition
of Atkins brings
asset management
expertise and suite
of technologies
applicable to
Intelligent O&M
2020 SNC-Lavalin
O&M generated
strong revenue and
Segment Adjusted
EBIT*, with a backlog
of $5.7B from 27
contracts
F U T U R E F O C U S
1998 SNC-Lavalin ProFac
rebrands to SNC-Lavalin
O&M Inc., reflecting the
expansion of non-FM1
operations and growing
portfolio of P3 projects
2013 Atkins sells
highways O&M
business and keeps
O&M participation
in M25 contract
2009 2017 202119981994 2013 2016 20171996
1996, Atkins
wins its first
highways
maintenance
services
contract
Targeting 4-6% annual organic
revenue growth (2022-2024)
through:
› Building upon
SNC-Lavalin’s platform
of P3 O&M and
services contracts
› Responding to our
client’s carbon reduction
goals and increasingly
digital asset management
by providing O&M of
complex infrastructure
1. Facilities Management
*Non-IFRS financial measures. Refer to Section 9 of the Company’s Q2 2021 MD&A for Non-IFRS financial measures definition and reconciliation to IFRS measures. See also the cautionary statement regarding Non-IFRS financial measures at slide 3.
2019

62
Well-Positioned to Capitalize on O&M Market Trends
Decarbonization
and Net Zero
Access to SNC-Lavalin’s
broad capabilities and
expertise in carbon reduction
strategies positions O&M as
an ideal, integrated long-
term partner for attaining
Net Zero goals
•Digital Asset
Management
Premier asset
management advisory
capabilities, data
analytics, asset data
models and digital
solutions allow us to
innovate and shape
the future of
Intelligent O&M
•
Growing
P3 Market
Well-positioned to
capture significant P3
O&M opportunities in
Canada, U.S. and UK
through existing
partnerships and
industry leadership
•
Integration of
Outsourced
O&M/FM1
Deep understanding of
design and delivery of
assets and ability to deliver
full range of services
differentiates our services
and is a sustainable
competitive advantage
•
1. Facilities Management

63
Forward Thinking Solutions to Accelerate Growth
WHERE WE PLAYStrongly positioned with a leading
presence across Canada and
targeted operations in the US, UK
and Middle-East, primarily focused
on the built and natural environment
across clearly defined end markets
HOW WE WIN Deploying global capabilities locally
to our clients and delivering unique
end-to-end services across the
whole life cycle of an asset, by
connecting people, data and technology
to meet the demands of the future
HOW WE GROW TO CREATE LONG-TERM VALUE
Deploying our strategy of: 1. Optimizing and leveraging our existing
contract base, 2. Continued pursuit of new P3 contracts, and 3. Combining
our asset management and digital capabilities with our O&M delivery skills to
capture “intelligent O&M” contracts.
One
SNC-Lavalin
Strategy

64
Expand key public sector client relationships by identifying
opportunities to build upon existing contracts through value enhancing
propositions and contract extensions
Introduce digital capabilities where opportunities exist to
optimize returns and reduce risk
Utilize existing base of O&M contracts to continue to collect asset
intelligence and demonstrate the success of our digital solutions
and reinforce our asset management advisory services
Our O&M contract
experience informs and
reinforces our consulting
practice and vice versa
O&M/FM1
delivery experience
Asset management
advisory
1. Facilities Management
1. Optimizing and Leveraging Our Existing Contracts

65
› SNC-Lavalin’s P3 O&M/FM1 contracts have yielded higher-than-industry margins than on non-P3 O&M/FM contracts
› Robust pipeline of projects in Canada, U.S. and UK
› Investing equity alongside O&M enhances the overall return to SNC-Lavalin and provides better certainty of returns
› Natural alignment between Capital and O&M given the matching return horizons
2. Pursuing New P3 Opportunities
Continued joint pursuit of P3 and DBFM2 contracts, using Capital to secure O&M and Engineering Services scope 1. Facilities Management 2. Design, Build, Finance and Manage

66
Intelligent
O&M
O&M/FM1
Delivery
Experience
Asset Management
Advisory
Digital ToolsEngineering and Project
Management
Expertise
› Intelligent O&M is being able to provide smart infrastructure
management solutions
› It’s about increasing the sophistication of O&M activities, such as
introducing drones and augmented reality to help increase safety and
reliability of O&M services
› Leveraging Digital: Applying developments in Information
Management, BIM, IOT, AI and systems thinking
› Beyond Asset Management: Integrated manager of assets and data
Integrate
1. Facilities Management
3. Intelligent O&M Contracts

67
Leveraging across client
relationships, including
complex assets and
systems, traditional sectors
and new assets
Helping clients achieve carbon
reduction goals through
integrated services that
optimize energy usage
3. Extending Beyond Consultancy into Intelligent O&M
Utilizing Intelligent O&M to create better outcomes for clients beyond current capabilities
Potential to
support:
› for better
decision
making
› for better
outcomes
Development of ‘intelligence’ in the
asset base
Ability of current client &
O&M organizations to respond
Time
Tech
nolo
gic
al A
dva
nce
Unused
Data
Becoming an integrated and embedded partner in the management of our client’s assets and data
Differentiated offering of multi-
year integrated asset and data
management contracts with
delivery of targeted, higher
value O&M or FM1 services,
or niche technical services
Uniquely positioned as a trusted partner
to ensure target outcomes are met
› Lower operating costs, improved reliability
and efficiency
› Creates incentive and outcome-based
relationships tied to client targets
› Early demonstration of savings can
help convert contracts into longer-term
relationships
1. Facilities ManagementSource: SNC-Lavalin internal research

68
CASE STUDY: Canada Line Rapid Transit System
Flagship P3 project demonstrating SNC-Lavalin’s integrated equity and operations and maintenance
OUTCOME
› Delivered >3 months ahead of schedule, well before 2010 Olympics
› Exceeding ridership forecasts since opening in 2009, over 50M boardings in 2019
› Operating performance is consistently achieving >99% system availability
› Partnering with client to accommodate capacity expansions, including increasing the vehicle fleet,
station improvements and addition of a new station
› Successful equity investment for SNC-Lavalin Capital, delivering above-bid equity IRR
CLIENT NEED
› A 19.5 km fully-automated and driverless
transit system connecting downtown
Vancouver to Richmond and Vancouver
Airport
› 16 stations, 2 bridges and 9 km of tunnels
› Completion ahead of the 2010 Olympics with
a total cost of $2B (2005);
› Delivery under P3 model (a first in Canada for
a transit system)
SNC-LAVALIN COMPREHENSIVE
SOLUTION
› Led the financing, design, delivery and the
operations and maintenance of the entire
system
› 35 years P3 contract
› Employing innovative maintenance
technologies, including remotely controlled,
autonomous rail-borne drones, and mixed
reality HoloLens 2 technology for training
technicians

69
Growing and Creating Value through O&M Opportunities
Multi-year contracts provide low-risk cashflows and are forecasted to provide Segment Adjusted EBIT to Segment Revenue ratio* of 5-7% from 2022-2024
Significant backlog of $5.8B1 of long-term contracts, providing high degree of visibility
O&M relationships create cross-selling opportunities and introduce clients to the full suite of services offered by SNC-Lavalin
O&M and Engineering Services are complementary and enhance the total value proposition of SNC-Lavalin
› Lessons learned can be leveraged in Engineering Services, and vice versa
The performance track record of O&M’s P3 contract portfolio enables SNC-Lavalin to access new P3 opportunities and creates entry points for Capital and Engineering Services
1. As of June 30, 2021
*Non-IFRS financial measures. Refer to Section 9 of the Company’s Q2 2021 MD&A for Non-IFRS financial measures definition and reconciliation to IFRS measures. See also the cautionary statement regarding Non-IFRS financial measures at slide 3.

70
Key Messages | Capital
4 Capital is a key differentiator for SNC-Lavalin
3 Opportunities in P3 market driven by further increased infrastructure spending in
Canada, U.S. and UK
2 History of successful delivery and asset management of P3 projects across a broad
range of asset classes uniquely positions us to deliver future P3 projects
1 Asset and investment management expertise with a track record of increasing and
optimizing investment value across a range of asset types

71
AN ALYS T C O N S E N S U S FAI R M AR K E T
VAL U E V S . N E T B O O K VAL U E ( $ M )
Capital Snapshot
504
1,800
495
H407 ETR Other Assets
Net Book Value (as at June 30, 2021)
Sell-side Analysts Fair Market Value Consensus(as at August 30, 2021)
01
Capital has been an important strategic contributor to
SNC-Lavalin’s results, providing cash flow and profitability
Developing strategic partnerships with key contractors and equity
partners to provide access to future bid opportunities
› Established the SNC-Lavalin Infrastructure Partners fund in
2017 to partially monetize interests in select mature P3 assets
Managing a portfolio of 17 assets and currently pursuing
multiple P3 bids in Canada, U.S. and UK
Targeting IRR > 10%
1. The net book value of H407 ETR is $nil as the Company had previously stopped recognizing its share of the losses of H407 ETR when the cumulative losses and dividends resulted in a negative balance for the Company’s investment in that asset

72
Diversified Capital Investments Portfolio
Name DescriptionHeld
Since
Concession
YearsLocation
Equity
Participation
1. 407 EDGGP 32 km H407 East extension (Phase 1) 2012 33 Canada (Ontario) 50%
2. Carlyle Global Infras. Opportunity
Fund LPHolding investments in infrastructure projects 2018 n/a United States 4.5%
3. Eglinton Crosstown 19 km light rail line 2015 36 Canada (Ontario) 25%
4. Highway 407 ETR 108 km electronic toll road 1999 99 Canada (Ontario) 6.76%
5. Highway Concessions One PL Fund (Roads) 2012 n/a India 10%
6. InPower BC John Hart 126 MW generating station 2014 19 Canada (B.C.) 100%
7. Myah Tipaza Seawater desalination plant 2008 n/a Algeria 25.5%
8. Rideau Light rail transit system 2013 30 Canada (Ontario) 40%
9. SKH 1,227 MW gas-fired power plant 2006 n/a Algeria 26%
10. SSL New Champlain bridge corridor 2015 34 Canada (Quebec) 50%
11. TC Dôme 5.3 km electric cog railway 2008 35 France 51%
12. TransitNEXT 12 km light rail line 2019 30 Canada (Ontario) 100%
Ownership through SNC-Lavalin Infrastructure Partnership LP
13. Chinook 25 km six-lane road 2010 33 Canada (Alberta) 10%
14. InTransit BC Rapid transit line 2005 35 Canada (B.C.) 6.7%
15. MIHG McGill University Health Centre 2010 34 Canada (Quebec) 10%
16. Okanagan Lake Floating bridge 2005 30 Canada (B.C.) 20%
17. Rainbow Restigouche Hospital Centre 2011 33 Canada (N.B.) 20%
NBV1 = $504M FMV2 ~$2.3B 1. Net Book Value as of June 30, 2021
2. Consensus Average Fair Market Value per sell-side analyst calculations, as of August 30, 2021

73
Highway 407 ETR is a World-Class P3 Concession
› Unique asset with
attractive terms
› Significant flexibility
on toll rates
› 77 years remaining
in the concession
› Provides long-term
shareholder value

74
Positive Momentum for Highway 407 ETR as COVID-19 Restrictions Lift
Well-positioned for post-pandemic traffic rate and economic recovery
1. Including London, Sydney, Singapore, Retrieved from the Globe and Mail (July 2, 2021)
H407 ETR GROSS VEHICLE
KILOMETERS TRAVELED2
0
50
100
150
200
250
300
Jan Feb Mar Apr May Jun Jul Aug
2019 2020 2021
2. Source: 407 International Inc.
Kilometers (M)
› Rapid traffic recovery has occurred in major global cities where COVID-19
restrictions have been lifted1
› In some cases, congestion is worse than pre-pandemic levels partly due to
reluctance to use public transit
› High vaccination rates and lifting of restrictions bode well for accelerating volume
recovery
› Greater Toronto Area (GTA) economic rebound, Ontario GDP expansion and
favorable immigration trends are positive catalysts
› Congestion Payment (Schedule 22 Agreement)
› COVID-19 is considered a Force Majeure event
› Lower traffic volumes will not trigger the minimum traffic threshold payments
until a toll increase or when volumes reach pre-pandemic levels

75
›Project Development
initiatives with
Engineering Services
and Nuclear
›P3 / DBFM1›Services
Contracts
›Performance
- Based
Contracts
›Intelligent
O&M
Contracts ›DBOM2
›O&M
›Capital
›Project
Management
Contracts
Key areas of Capital + O&M
collaboration
Capital is a key differentiator and
enables us to access and bundle
investment, O&M services and
engineering services roles in P3 projects
✓ Return horizon and partnership mindset
of Capital and O&M are strategically
aligned✓
›Capital + O&M Joint-Market Approach
Highlights
› Consistent contributor of EBIT
› Most of Capital’s investments
have delivered higher than bid
target equity returns
› SNC-Lavalin is the O&M/FM3
provider on 14 of Capital’s
investments
› Robust P3 and related model
project pipeline in core Canadian,
U.S. and UK markets
Capital and O&M help create synergies in the way we finance, operate and manage assets 1. Design, Build, Finance and Manage 2. Design, Build, Operate and Maintain 3. Facilities Management

76
Key Takeaways | O&M and Capital
1Long-term, focused
alignment of equity
investment and O&M
services and track record
of successful P3 delivery
position SNC-Lavalin for
continued access to
P3 projects
2Opportunities for further
value optimization and
demonstration of advanced
O&M solutions within
existing portfolio
3Well-positioned to become
an embedded, integrated
delivery partner through
multi-year integrated asset
and data management
contracts
4Capital is a key
differentiator within our
end-to-end solutions and
enables additional
business opportunities
in Engineering Services
and O&M


78
Key Messages | Nuclear
1
2
3
Well-positioned for growth with a stable base of long-term, low-risk and profitable contracts
with key, high-quality clients
Differentiated business enabled by proprietary technology, intellectual property and customized
product solutions, including advances in robotics, digital and waste reduction technologies
Highly responsible, innovative partner with technical expertise and globally recognized
talent pioneering solutions across the Nuclear value chain
4 Global initiatives for a carbon Net Zero future create significant opportunitiesCO2

79
Nuclear is Well-Positioned to Capitalize on Energy Market Trends
Waste
Management
Proven results
and reputation as a
responsible partner
provide a clear pathway for
sustained profitable growth
Available Electrical
Supply Must Increase
Decarbonization will
require governments
to increase the
electrical supply
available on the
grid by 2050
Life
Extensions
Decades of
expertise and
proprietary
capabilities in
servicing CANDU
reactors position
SNC-Lavalin for
decades of growth
in reactor support
and life extensions
Prompt
Decommissioning
Developing
industry leading
solutions which
dramatically reduce
timeframe
Increased
Importance Globally
Global sea-change in
the way governments
and society view the
importance of low-carbon
energy infrastructure
Integrated
Energy Solutions
Nuclear energy
supports and
complements the
development of
future alternative
fuel sources such
as hydrogen

80
1. Adjusted backlog is a non-IFRS measure and includes SNC-Lavalin’s proportionate share of the JV estimated contracted backlog over the duration of contract
*Non-IFRS financial measures. Refer to Section 9 of the Company’s Q2 2021 MD&A for Non-IFRS financial measures definition and reconciliation to IFRS measures. See also the cautionary statement regarding Non-IFRS financial measures at slide 3.
Nuclear Snapshot
2 0 2 0 R E V E N U E
46% Canada
28% U.S.
25% UK, EUR, ME
1% Other
B AC K L O G B Y
S E RV I C E S ( $ M )
2Q2021 2Q2021 ADJ.
831
5,982
Decommissioning & Waste Management (DWM)
Reactor Support (RS) and Life Extensions (LE)
New Builds
B AC K L O G B Y L E N G TH
O F C O N TR AC T ( $ M )
Includes
share of
JVs
$929M
G L O B AL
E M P L O YE E B AS E
~8,000Employed
through JVs
~2,800Direct
Management
15.4%13.7%
15.1%
2018 2019 2020
H I S T O R I C A L S E G M E N T A D J U S T E D E B I T T O
S E G M E N T R E V E N U E R AT I O *
Targeting consistent 13-15% Segment Adjusted EBIT to Segment
Revenue ratio* while we continue to grow the business
4,673
1,309
2Q2021 ADJ.
5,982
1-5 Years
5+ Years
40% Derived from Decommissioning
& Waste Management
1 1

81
Recognized High Quality Nuclear Brand with Broad Capabilities
Benefitting from an integrated organization
Stewards of CANDU® technology
for over 60 years
Unique expertise for new builds
Extensive technology portfolio of
200+ active & pending patents to
address reactor life cycle and
Waste Management
Expertise in other reactor types,
broad services offering and
digital capabilities
Deep Decommissioning and
Waste Management capabilities
2004 2011 2017 2018 Today
SNC-Lavalin
Nuclear
Pre-2010 20152014
Nuclear
Safety
Associates
C O M B I N E D C APAB I L I T I E S
2019

82
Sustainable Competitive Advantages
Reputation as a
global leader in nuclear technologies
including CANDU OEM1
Owners and
developers of proprietary
nuclear technologies
Broad technical
capabilities and global
footprint enabled by
One SNC-Lavalin
Strong base of highly
talented engineers,
scientists and
technical staff
1 3 42
1. Original Equipment Manufacturer
Well-positioned in a market which has high barriers to entry

83
Culture of Excellence
› Continuous training on Culture of Excellence (e.g., communication,
affirmative responses)
› Commitment to the highest technical standards and operational excellence
helps us attract and retain the best nuclear engineers, scientists and
technical staff
› Decades of combined, institutionalized experience that cannot easily be
replicated
› Transfer of knowledge from retiring engineers to next-gen leaders
› Track-record of execution is key to our success
SNC-Lavalin is a highly trusted name in Nuclear
Secretary of Energy
Achievement Award
2020 Recognized for the work on Thorium
Express Project
Key supplier

84
Generating Growth in Nuclear
WHERE WE PLAY
Strongly positioned with a leading
presence in Canada and the UK
across the nuclear value chain, and
a strong presence in the U.S., with
a primary focus on Nuclear Waste
Management and Decommissioning
HOW WE WIN
Deploying global capabilities locally
to our clients and delivering unique
end-to-end services across the whole
life cycle of an asset, by connecting
people, data and technology to meet
the demands of the future
HOW WE GROW TO CREATE LONG-TERM VALUE
Leveraging the depth of our capabilities in strong, growing
markets consistently delivering high quality services to our
customers and investing in organic and inorganic opportunities
One
SNC-Lavalin
Strategy

85
Focused Geographic Positioning and Technology Export
85
Decommissioning & Waste Management (DWM)
Reactor Support (RS) and Life Extensions (LE)
New Builds
Isotek
Hinkley Point C
CNL
Sellafield
Lingen
Darlington
and BruceHanford
Plateau
IPEC 1, 2, 3
~1,200
Employees
in Canada
~500
Employees
in the U.S.
~1,100
Employees in UK,
Europe and ME
Wolseong
Qinshan
CernavodaSizewell C
Whiteshell
Oak Ridge
Savannah River
ITER
Hinkley Point C
(UK)Major New Builds
Project
Darlington
(Ontario, CA)Major CANDU
refurbishment project
Oak Ridge
(Tennessee, U.S.)Major Waste
Management project

86
0
5
10
15
20
25
30
35
40
0 1 2 3 4 5 6 7 8 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
# o
f re
ac
tors
Years of operation
ALL WAYS FORWARD
GENERATE OPPORTUNITIES:
Construction boom
of the ‘70/80s201 reactors between 30 and 40 years old
Construction boom
of the ’60/70s87 reactors over 40 years old
Number of reactors and years of operation1
3 WAYS FORWARD
FOR OWNERS:
Seek life extensions1
Enter “safe-store”
(deferred Decommissioning)2
Accelerate Decommissioning3
Safe-store: Project and planning work
connected to defueling, dry storage,
component drain down, waste processing.2
Life extensions: Major project work
such as plant upgrades, refurbishment
work, significant safety case work.1
Accelerated decommissioning: Full
project work to manage site closure,
with waste management challenges.3
Aging Reactor Fleet Creates Opportunities
1. Source: World Nuclear Association – Reactor Database

87
DecommissioningConsulting
& Advisory
Procurement Project &
Construction
Management
Operations
& Maintenance
Design
& Engineering
CapitalTechnology
Subsector Focused Approach to Nuclear
PR OVID IN G A C OM PR EH EN SIVE EN D - TO- EN D SERVIC E AN D TEC H N OLOGY OFFE R IN G
NEW BUILDS REACTOR SUPPORT (RS) &
LIFE EXTENSIONS (LE)
DECOMMISSIONING AND
WASTE MANAGEMENT (DWM)
› Field services, remediation, nuclear fuel
management, transportation and
environmental clean-up
› Industry-leading general decommissioning
contractor in the U.S. through CDI
joint venture
› Recognized USA Federal Tier-1 contractor
› Leading depth and breadth in the industry
› World leader in heavy water reactors as
OEM2 for CANDU
› Ensuring reactors fulfill expected life with
engineering, design, consulting, on-site
services, project management and
asset management
› Operate and revitalize National Labs
› Steward of CANDU nuclear technology
› Decades of major EPCM1 experience,
delivering end-to-end solutions from
offices around the world
› Collaborating with Small Modular
Reactor vendors to develop new
reactor technology
1. Engineering Procurement and Construction Management
2. Original Equipment Manufacturer

88
Decommissioning and Waste Management Subsector
U.S. - Department
of Energy &
US Army Corps
of Engineers
Nuclear Cleanup
Sites
U.S. - Commercial
Nuclear Sites
Canadian
Nuclear Sites
UK
Government
Sites
Commercial and Government Nuclear Sites
Sources: Retrieved from the US N.R.C., US Department of Energy, Government of Canada, EDF Energy, Nuclear Decommissioning Authority (NDA) websites

89
P&T1
for Decommissioning
and Waste
Management
P&T for Decommissioning
Digital Twins for optimized D&D2
Robotics for radioactive material handling
Remote site operations Containers for spent fuel and radioactive waste
Liquid radwaste treatment
Solid radwaste treatment and processing
P&T for Waste Management
1. Products and Technology
2. Decontamination and Decommissioning
Decommissioning and Waste Management Subsector Our Technologies Create Long-Term Relationships and Growth Opportunities

90
D&D IPEC 1, 2, 3 (CDI)
D&D Palisades (CDI)
2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034
DoE - Federal Government Contract - Porstmouth D&D
DoE - Federal Government Contract - West Valley
OPG Decommissioning of Pickering Power Plant NGS
DoE - Federal Government Contract - WIPP M&ODoE - Integrated Tank disposition contract (Hanford)
DoE - Hanford Central Plateau
DoE - Savannah R M&O
DoE - Oak Ridge Reservation
DoE - DUF 6
Sellafield Decommissioning Delivery Partnership (DDP)
D&D Oyster Creek (CDI)
D&D Pilgrim (CDI)
D&D Lingen
Federal Government Contract - CNEA / CNL M&O (2)
Isotek –-TerraPower Partnership (1)
DoE - Savannah River Integrated Mission Completion
Vulcan Decommissioning
In option**
Remaining adjusted
backlog* in existing
contracts
$6B
$2B
In bid /
negotiation /
development**
>$50B
Legacy CANDU reactors DecommissioningNDA accelerated Decommissioning of the Magnox / AGR fleet
DW
MR
S &
LE
Refurb. Darlington RFR combined execution and definition
Refurb. Bruce 6Refurb. Bruce 3
Refurb. Bruce 4Refurb. Bruce 5
Refurb. Bruce 7Refurb. Bruce 8
Quinshan Unit 1
Refurb. Cernavoda 1 - Phase 1 Design Modification contract awarded
Ne
w B
uil
ds
ITER - Engage Partnership extension (3)
Hinkley Point C Programme
Cernavoda Units 3 & 4
EDF Sizewell C Nuclear Power Plant
Multiple SMR proponents
Decommissioning and Waste Management Subsector Main Project Pipeline Provides Long-Term Visibility
* Adjusted backlog is a non-IFRS measure and includes SNC-Lavalin’s proportionate share of the JV estimated contracted backlog over the duration of contract ** Represents the Company’s estimation of the value of total contract options and total identified opportunities
Note: Federal and DoE contracts are typically bid as JV with partners; SNC-Lavalin receives 20% - 50% of JV net income 1. Isotek contract started in 2003 and was extended to 2026 2. Federal govt contract extended to 2025-2026

91
Enhancing Canadian skills & expertise in environmental remediation and cutting-edge science and technology
OUTCOME
› Rebuilding a 70 years-old nuclear campus to support 21st century science and technology;
executing the largest and most complex environmental remediation programme in Canada
› Reimagining the nuclear R&D mission in Canada focusing on emerging clean energy technology,
advanced radiopharmaceuticals and providing platform for Small Module Reactors
› Enhancing engagement and outreach to Canadian Nuclear Industry
› Option exercised by AECL in 2020 to extend contract through 2026, based on superior performance
Decommissioning and Waste Management Subsector Case Study | Canadian Nuclear Laboratories (CNL)
CLIENT NEED
› Lab modernization, environmental restoration
& waste management
› Growth of CNL Science & Technology Mission
› Leadership and management of over
3,000 employees
› Execute $1.1B target-cost/schedule contract
with AECL for Whiteshell Lab cleanup/closure
SNC-LAVALIN COMPREHENSIVE
SOLUTION
› Collaboration & Leadership: Deployed
SNCL Nuclear leadership from core regions
of UK, Canada, U.S.
› Innovation and Technology: Applied
solutions reducing legacy environmental
liabilities, growing CNL Science and
Technology missions, and sustaining
Canada’s nuclear industry viability
Photo © Canadian Nuclear Laboratories

92
P&T1
for Reactor Support &
Life Extensions
Retube Tooling Systems
Field Services Products Operations & Maintenance Software
Nuclear Steam Plant Components
1. Products and Technology
Reactor Support and Life ExtensionsOur Technologies Create Long-Term Relationships and Growth Opportunities

93
D&D IPEC 1, 2, 3 (CDI)
D&D Palisades (CDI)
2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034
DoE - Federal Government Contract - Porstmouth D&D
DoE -Federal Government Contract - West Valley
OPG Decommissioning of Pickering Power Plant NGS
DoE - Federal Government Contract - WIPP M&ODoE - Integrated Tank disposition contract (Hanford)
DoE – Hanford Central Plateau
DoE - Savannah R M&O
DoE - Oak Ridge Reservation
DoE - DUF 6
Sellafield Decommissioning Delivery Partnership (DDP)
D&D Oyster Creek (CDI)
D&D Pilgrim (CDI)
D&D Lingen
Federal Government Contract - CNEA / CNL M&O (2)
Isotek –-TerraPower Partnership (1)
DoE - Savannah River Integrated Mission Completion
Vulcan DecommissioningLegacy CANDU reactors DecommissioningNDA accelerated Decommissioning of the Magnox / AGR fleet
DW
MR
S &
LE
Refurb. Darlington RFR combined execution and definition
Refurb. Bruce 6Refurb. Bruce 3
Refurb. Bruce 4Refurb. Bruce 5
Refurb. Bruce 7Refurb. Bruce 8
Quinshan Unit 1
Refurb. Cernavoda 1 - Phase 1 Design Modification contract awarded
New
Bu
ild
s
ITER - Engage Partnership extension (3)
Hinkley Point C Programme
Cernavoda Units 3 & 4
EDF Sizewell C Nuclear Power Plant
Multiple SMR proponents
Reactor Support (RS) and Life Extensions (LE)Main Project Pipeline Provides Long-Term Visibility
Remaining adjusted
backlog* in existing
contracts
$6B
$2B
In bid /
negotiation /
development**
>$50B
In option**
* Adjusted backlog is a non-IFRS measure and includes SNC-Lavalin’s proportionate share of the JV estimated contracted backlog over the duration of contract ** Represents the Company’s estimation of the value of total contract options and total identified opportunities

94
New Builds Subsector
Collaborating with Small Modular and Advanced Reactor
vendors to develop new reactor technologies
1. Engineering, Procurement and Construction Management
Decades of major EPCM1 experience, delivering
end-to-end solutions from Canada and the UK
Exclusive licensee of CANDU® nuclear technology
Involved in the development of revolutionary fusion
reactor technologies
Governments’ commitment to Net Zero carbon by 2050 will significantly increase electricity demand
ITER, France

95
D&D IPEC 1, 2, 3 (CDI)
D&D Palisades (CDI)
2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034
DoE - Federal Government Contract - Porstmouth D&D
DoE -Federal Government Contract - West Valley
OPG Decommissioning of Pickering Power Plant NGS
DoE - Federal Government Contract - WIPP M&ODoE - Integrated Tank disposition contract (Hanford)
DoE – Hanford Central Plateau
DoE - Savannah R M&O
DoE - Oak Ridge Reservation
DoE - DUF 6
Sellafield Decommissioning Delivery Partnership (DDP)
D&D Oyster Creek (CDI)
D&D Pilgrim (CDI)
D&D Lingen
Federal Government Contract - CNEA / CNL M&O (2)
Isotek –-TerraPower Partnership (1)
DoE - Savannah River Integrated Mission Completion
Vulcan DecommissioningLegacy CANDU reactors DecommissioningNDA accelerated Decommissioning of the Magnox / AGR fleet
DW
MR
S &
LE
Refurb. Darlington RFR combined execution and definition
Refurb. Bruce 6Refurb. Bruce 3
Refurb. Bruce 4Refurb. Bruce 5
Refurb. Bruce 7Refurb. Bruce 8
Quinshan Unit 1
Refurb. Cernavoda 1 - Phase 1 Design Modification contract awarded
New
Bu
ild
s
ITER - Engage Partnership extension (3)
Hinkley Point C Programme
Cernavoda Units 3 & 4
EDF Sizewell C Nuclear Power Plant
Multiple SMR proponents
New Builds Subsector Main Project Pipeline Provides Long-Term Visibility
Remaining adjusted
backlog* in existing
contracts
$6B
$2B
In bid /
negotiation /
development**
>$50B
In option**
* Adjusted backlog is a non-IFRS measure and includes SNC-Lavalin’s proportionate share of the JV estimated contracted backlog over the duration of contract ** Represents the Company’s estimation of the value of total contract options and total identified opportunities
3. ITER contract was signed in 2010 and extended to 2025

96
Nuclear | Key Drivers and Targets
› Expected growth in overall sector supported by long-term contracts
and continued market penetration in our targeted geographies
› Decommissioning & Waste Management (DWM) and new
technologies will be the major contributor to our planned growth
› Reactor Support (RS) and Life Extensions (LE) will continue to
underpin our overall market position
› New Builds longer-term and more opportunistic
KEY DRIVERS
4-6%ANNUAL ORGANIC
REVENUE GROWTH
TARGET
13-15%ANNUAL SEGMENT ADJ.
EBIT TO SEGMENT
REVENUE RATIO*
TARGET
*Non-IFRS financial measures. Refer to Section 9 of the Company’s Q2 2021 MD&A for Non-IFRS financial measures definition and reconciliation to IFRS measures. See also the cautionary statement regarding Non-IFRS financial measures at slide 3.
ANNUAL TARGETS (2022-2024)

97
Key Takeaways | Nuclear
1
Well-positioned for
growth with a stable
base of long-term,
low-risk and profitable
contracts with key,
high-quality clients
2
Differentiated business
enabled by proprietary
technology, intellectual
property and customized
product solutions,
including advances in
robotics, digital and waste
reduction technologies
3
Highly responsible,
innovative partner with
technical expertise and
globally recognized talent
pioneering solutions across
the Nuclear value chain
4
Global initiatives
for a carbon net
zero future create
significant
opportunities
CO2

O C T O B E R 2 9 , 2 0 2 1

99
Key Messages
3 Targeting positive free cash flow* in the medium term (2022-2024), with associated
capital allocation prioritized to returning to investment grade and accelerating growth
2 SNCL Services positioned to deliver mid-single digit organic revenue growth year-over-
year with continued margin strength
1 Substantial progress in strengthening the balance sheet and de-risking the business
*Non-IFRS financial measures. See the cautionary statement regarding Non-IFRS financial measures at slide 3 and slide 101.

100
Highlights
› Core SNCL Services
is a strong and growing
proportion of the Company,
as LSTK projects wind down
› EBIT underpinned by stable
SNCL Services
› Capital Segment Adjusted
EBIT* expected to grow back
towards pre-Covid levels as
Highway 407 traffic improves
C O N S O L I D ATE D R E V E N U E ( $ M )
S E G M E N T AD J . E B I T ( $ M ) *
Historical Financial Performance
*Non-IFRS financial measures. Refer to Section 9 of the Company’s Q2 2021 MD&A for Non-IFRS financial measures definition and reconciliation to IFRS measures. See also
the cautionary statement regarding Non-IFRS financial measures at slide 3.
13%18%
2018
73%15%
24%
85%
2019
79%
2020
7,630
83%
H1 2021
7,5737,008
3,618
SNCL Services Capital SNCL Projects
552 559 540278
H1 20212018
125
2019 2020
445 584
284

101
Highlights
› Opportunity to deploy FCF in
additional returns to
shareholders
› FCF profile will continue to
improve as LSTK risks are
wound down
› Placeholder
› Placeholder
› Placeholder
Improving Free Cash Flow* Performance
› Focused on continuing to
improve FCF* profile as LSTK
risks are wound down
› Focused on LSTK projects
cost recovery
› Going forward, FCF* generating
capabilities of SNCL Services
should more easily emerge
106
-236-308
-355
12284
-152
-125
-153-123
-76-38
-119
-119
-59
20202016
-73
20192017
-46
2018 H1 2021
-361
-461
-597
-13
Net cash generated from (used for) operating activities Acquisition of property and equipment Payment of lease liabilities
C O N S O L I D ATE D F C F * ( $ M )Highlights
*FCF is a non-IFRS measure and is calculated as follows: Net cash generated from (used for) operating activities less acquisition of property and equipment and less
payment of lease liabilities

102
Highlights
› LSTK Project backlog reduced
by ~60% over last two years
› Oil &Gas business sale in 2021
accelerated LSTK backlog
reduction
› Three remaining Infrastructure
light rail LSTK Projects in
Canada remain
› Legacy projects de-risked;
Continued focus on project risk
management a priority
L S TK B AC K L O G ( $ B )
Dec-24June-20June-19 June-21
~3.4
~2.6
~1.4
LSTK Project Backlog Materially Reduced Over
Last 2 Years
~0
Infrastructure LSTK projects Resources LSTK projects

103
Focusing on Successful Execution of Remaining LSTK Projects
Significant progress achieved post Q2 2019 and on track to complete wind-down
Backlog ($M) <175 <400 <700
Approximate
Completion~90% ~55% ~55%
Expected Substantial
Completion Year2022 2022 2024
Eglinton Trillium Réseau Express Métropolitain (REM)
As of June 30, 2021

104
Engineering Services
2020 Revenues Strategic Realignment Enables Focused Execution
2022
Reportable
Segment
EDPM1 Power &
Industrial
services
O&M3 Linxon Nuclear
1. Engineering Design and Project Management. 2. Lump Sum Turnkey 3. Operations and Maintenance 4. Engineering Procurement Construction
Current
Reportable
Segment
Resources
ServicesInfrastructure
EPC4 Projects
Resources Infrastructure Services
ResourcesLSTK2
projectsCapital
~$4.2B
Engineering Services O&M3
~$0.5B
Linxon
~$0.5B ~$0.9B
Nuclear Capital
~$0.1B
LSTK2
projects
~$0.7B
SNCL Services

105
Setting the Stage for Future Growth
EB IT M AR GIN S
Focus on maintaining profitable
growth, with continued
optimization of cost base
through transformation agenda
to deliver further efficiencies
R EVEN U E GR OW TH
Drive revenue growth in SNCL
Services while running off
LSTK backlog
FR EE C ASH FLOW *
C ON VER SION
Deliver positive FCF* as LSTK
projects run off allowing highly
cash generative attributes of
SNCL Services to emerge
*Non-IFRS financial measures. See the cautionary statement regarding Non-IFRS financial measures at slide 3 and slide 101.

106
›S N C L S E RV I C E S ›L S TK P R O J E C TS ›C AP I TAL
Growth will be
mainly driven by
Highway 407 ETR
dividend
6.1
2020 2024E2021E
~7.0-7.6
Eng. Services Nuclear LinxonO&M
4-6%
CAGR
0.7
2020 2024E
~0
2020
0.1
Low-single
digits %
growth
$B
Revenue Growth Over Next Three Years to Be Driven by SNCL Services

107
Historical Segment Adj. EBIT to Segment Revenue Ratio*
›E D P M
*Non-IFRS financial measures. Refer to Section 9 of the Company’s Q2 2021 MD&A for Non-IFRS financial measures definition and reconciliation to IFRS measures.
See also the cautionary statement regarding Non-IFRS financial measures at slide 3.
Highlights
› SNCL Services targeting
operating margin ranges
similar to recent history
› New operating margin metric
of Segment Adjusted EBITDA/
Segment net revenue ratio* to
be introduced in 2022 for the
Engineering Services segment,
with target range of 14-16%
›N U C L E A R
›I N F R A S T R U C T U R E S E R V I C E S
15.5%14.0%
16.1% 14.8% 13.9% 14.2%
Q1 ’21Q2 ’20Q1 ’20 Q4 ’20Q3 ’20 Q2 ’21
4.9%7.3% 7.8%
9.6%
5.8%7.9%
Q2 ’20Q1 ’20 Q3 ’20 Q4 ’20 Q1 ’21 Q2 ’21
6.1%8.4% 9.0% 9.0% 8.6% 9.1%
Q4 ’20Q1 ’20 Q2 ’20 Q3 ’20 Q1 ’21 Q2 ’21
10%
8%
Target
15%
13%
7%
5%
Margins Expected to Remain in Current Target Ranges

108
Targeting Strong Free Cash Flow* Generation
Targeting free cash flow* annual conversion between 80-90%1
1. Conversion calculated as a percentage of consolidated adjusted net income, excluding the Federal charges settlement of $56M per year (2022-2024)
FCF* IMPROVEMENT DRIVERS BY 2024 KEY DRIVER COMMENTS
› LSTK projects cash consumption winding
down as backlog reduces
› SNCL Services working capital improves
as COVID-19 payment term impacts
unwind
› Expected EBITDA growth in SNCL
Services from higher revenue and
sustained EBIT margins
SNCL Services
working capitalSNCL Services
EBITDA growth
LSTK projects
wind-downFY’21E FCF* FY’24E FCF*
80-90%1
Conversion
*Non-IFRS financial measures. See the cautionary statement regarding Non-IFRS financial measures at slide 3 and slide 101.

109
Capital Allocation Priorities in Support of Our Strategy
Accelerate strategy through
organic and inorganic investments
› Drive organic growth by allocating
capital to internal strategic
initiatives in key growth areas
› Deploy capital in value creating
bolt-on acquisitions, primarily in
our core markets and growth areas
Investing in
the business
Opportunistically return
capital to shareholders
through share buybacks
› When there is a lack of attractive
bolt-on acquisitions opportunities
and through dividends
Returning capital
to shareholders
Strengthening the
balance sheet
› Enable the business to further
improve financial resiliency through
the business cycle
› Compete effectively for long term
contracts e.g. O&M
Improve debt leverage ratios
to achieve investment grade
STRENGTHEN GROW AND CREATE VALUE
Capital allocation priorities

110
Strengthening a Flexible Balance Sheet
2018 2019 2020 Current
C R E D I T R ATI N G
› Long-term leverage ratio target range of
1.5x-2.0x
› Return to investment grade rating
important for
› Winning long duration O&M contracts
and other types of work
› Lower cost of debt
› Having access to sufficient liquidity
facilities
P R I O R I T I ES
BBB (stable)
BB+ BB+
3.2x
2.7x
2020 2Q21 2024E
N E T L I M ITE D R E C O U R S E & R E C O U R S E D E B T TO
C O N S O L I D ATE D AD J U S TE D E B I TD A*
BB+
*Non-IFRS financial measures. Refer to Section 9 of the Company’s Q2 2021 MD&A for Non-IFRS financial measures definition and reconciliation to IFRS measures. See also the cautionary statement regarding
Non-IFRS financial measures at slide 3.
S&P
DBRS
BBB (stable)
BBB (low) BBB (low)BB (high)
2.0x
1.5x
Target

111
Complementary activities & services with opportunities
for cross-selling✓
Fits our new risk profile✓
Good cultural fit & share our vision, values and
corporate culture✓
Strong backlog of projects and client base supported
by strong technical expertise and people✓
Strategic Bolt-On Acquisitions | Accelerator of Future Growth in Key Markets
Strategic Filters
Qualitative Criteria
Year 1 adj. EPS accretion with
expectation for margin enhancement✓
FCF* positive within 1 year✓
ROIC significantly higher than WACC✓
Financial Criteria
Primarily core
regions1 and
end markets2
Bolt-on /
white space
opportunities
Expands
capabilities
Aligned
with overall
growth strategy
1. U.S., UK and Canada 2. Transportation, Buildings & Places, Defence, Water, Industrial & Mining, Power & Renewable, Nuclear
*Non-IFRS financial measures. See the cautionary statement regarding Non-IFRS financial measures at slide 3 and slide 101.

112
Financial Targets (2022-2024)1
S E G M E N T AD J .
E B I T TO S E G M E N T
R E V E N U E R ATI O *
O R G AN I C
R E V E N U E
G R O WTH
N E T L I M ITE D R E C O U R S E
& R E C O U R S E D E B T TO
C O N S O L I D ATE D AD J .
E B I TD A*
F C F * * O V E R
C O N S O L I D ATE D AD J .
N E T I N C O M E
C O N V E R S I O N
*Non-IFRS financial measures. Refer to Section 9 of the Company’s Q2 2021 MD&A for Non-IFRS financial measures definition and reconciliation to IFRS measures. See also the cautionary statement regarding Non-IFRS financial measures at slide 3.
**Non-IFRS financial measures. See the cautionary statement regarding Non-IFRS financial measures at slide 3 and slide 101.
1. Reference is made to the Company's press release dated September 28, 2021, for details of the limitations of and assumptions underlying these financial targets. 2. Excluding the Federal charges settlement of $56M per year (2022-2024)
4-6% 8-10% 80-90%2 1.5-2.0x
S N C L S E RV I C E S
( AN N U AL LY)
C O N S O L I D ATE D
( B Y E N D O F 2 0 2 4 )
Engineering Services (ES) 8-10%
ES Adj. EBITDA / Net Revenue 14-16%
Nuclear 13-15%
Linxon 4-6%
O&M 5-7%

113
Key Takeaways
Substantial progress over the
last two years strengthening
the balance sheet, and de-
risking the business
SNCL Services positioned to
deliver mid-single digit organic
revenue growth year-over-year
with continued margin strength
Targeting positive free cash flow*
in the medium term (2022-2024),
with associated capital allocation
prioritized to returning to
investment grade and
accelerating growth
1 2 3
*Non-IFRS financial measures. See the cautionary statement regarding Non-IFRS financial measures at slide 3 and slide 101.

114

115