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NBC CONFERENCE

JUNE 2020

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FORWARD-LOOKING STATEMENTS

This presentation contains forward-looking statements which are mainly about, but may not be limited to, Héroux-Devtek’s future financial performance,expectations, objectives or possible events. The predictive nature of such statements makes them subject to risks, uncertainties and other important factors thatcould cause the actual performance or events to differ materially from those expressed in or implied by such statements.

Such factors include, but are not limited to: the impact of worldwide general economic conditions; industry conditions including changes in laws and regulations;increased competition; the lack of availability of qualified personnel or management; availability of commodities and fluctuations in commodity prices; financialand operational performance of suppliers and customers; foreign exchange or interest rate fluctuations; and the impact of accounting policies issued byinternational standard setters. For further details, please see the Risk Management section of the Corporation’s MD&A. Readers are cautioned that theforegoing list of factors that may affect future growth, results and performance is not exhaustive, and undue reliance should not be placed on forward-lookingstatements.

Héroux-Devtek provides such forward-looking statements for the purpose of assisting the reader in understanding the Corporation’s financial performance andprospects and to present management’s assessment of future plans and operations. The reader is cautioned that such statements may not be appropriate forother purposes.

Although management believes in the expectations conveyed by the forward-looking statements and although they are based on information available to it onthe date such statements were made, there can be no assurance that such expectations will prove to be correct. All subsequent forward-looking statements,whether written or orally attributable to the Corporation or persons acting on its behalf, are expressly qualified in their entirety by these cautionary statements.Unless otherwise required by applicable securities laws, the Corporation expressly disclaims any intention, and assumes no obligation to update or revise anyforward-looking statements whether as a result of new information, future events or otherwise.

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ABOUT HÉROUX-DEVTEK

8 FACILITIESCANADA5

FACILITIESU.S.A.

3 FACILITIES UK

2 FACILITIES IN SPAIN

≈2,000

AEROSPACE COMPANYWORLD’S 3RD LARGEST LANDING GEAR MANUFACTURER

$ 272

$ 365 $ 407 $ 407 $ 387

$ 484

$ 613

FY14 FY15 FY16 FY17 FY18 FY19 FY20

14.5% CAGRGROWING REVENUE

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FISCAL 2020 RESULTS

(1) Non-IFRS financial measure. Please refer to the “Non-IFRS financial measures” section at the end of this document for further details

($M except per share data)Fiscal years ended

March 31 Variance

2020 2019 %

Sales 613.0 483.9 26.7

Gross profit % 16.8% 17.2% (40 bps)

Operating income (30.1) 37.2 (180.7)

Operating income (%) (4.9%) 7.7% (1260 bps)

Adjusted EBITDA(1) 96.2 74.2 29.6

Adjusted EBITDA(1) % 15.7% 15.3% 40 bps

Net income (50.7) 26.2 (293.4)

Adjusted net income(1) 35.7 30.4 17.5

EPS (1.38) 0.73 (289.0)

Adjusted EPS(1) 1.00 0.84 19.0

Sales growth of 26.7%• Organic growth of 6.1%

• Acquisitions contributed 20.6%

Operating income down from 7.7% to (4.9%) of sales

• $85.8M of impairment charges (non-cash)

• ADJ operating income(1) at $52.5M up from $41.6M,stable at 8.6% of sales

Adjusted EBITDA(1) grew from 15.3% to 15.7% of sales

A RECORD YEAR ON ALL FRONTS

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REVENUE SEGMENTATION

28%

5%5%

3%11%

24%

14%

10%

Large Jets Bus. JetsR.J. HelicoptersOther TransportFighters Helicopters

Diversified

z

Commercial Defence

54%Defence

z

Aftermarket OEM

33%Aftermarket

42%

31%

16%

11%

z

Proprietary Built-to-print - OEMBuilt-to-print - Tier 1 Built-to-print - Other

Diversified

WELL-BALANCED AND DIVERSIFIED BUSINESS

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8FACILITIESIN CANADA

5FACILITIES

IN U.S.A.

3FACILITIESIN UK

COVID-19 STATUS

Spain (327 Employees)- HDI: 6 Cases

UK (343 Employees)- HDI: 1 Case

Canada ( 1,087 Employees)- HDI: 4 Cases

USA (350 Employees)- HDI: 0 Cases

Effective protocols implemented in all of our facilities

2FACILITIESIN SPAIN

All facilities are operating with minimal disruption

None of our facilities have experienced a case of virus transmission

Attendance averaging 90% in all our facilities

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EQUIPPED TO WEATHER THE STORM – STRONG FINANCIAL POSITION

0

10

20

30

40

50

60

70

80

FY18 FY19 FY20

Cash flow generation

Cash flows related to operating activitiesFree Cash Flow

$96.5 $60.0

2021 2022 2023 2024 2025 2026

Capital Repayment Schedule

Credit Facility Term Loan Facility

$193M of available liquidityCash and cashequivalentsRevolving facility

Term loan facility

WE CONTINUE TO GENERATE POSITIVE FREE CASHFLOW

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EQUIPPED TO WEATHER THE STORM – HEALTHY ORDER BOOK

2/3 of order book comes from the defence market

Defence market relatively unaffected by COVID-19

Order book diversified by sector, geography and customer

$ 460 $ 405

$ 466

$ 624

$ 810

2016 2017 2018 2019 2020

FIRM ORDER BOOK NEW HEIGHT

As at March 31,

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EQUIPPED TO WEATHER THE STORM – RAMP-UP PHASE OF NEW PLATFORMS

BOEING F/A-18 E/F SUPER HORNET AND EA-18G GROWLER1st delivery Q2-FY21

BOEING MQ-25UNMANNED AERIAL REFUELING PROGRAMNew PlatformDevelopment phase

SIKORSKY CH-53K*New PlatformEntering LRIP phase

SAAB GRIPEN E*New PlatformEntering LRIP phase

* Proprietary programs

GENERATING NEW SALES FOR THE FISCAL YEAR

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EQUIPPED TO WEATHER THE STORM – THE RIGHT TEAM IN PLACE

Experienced management team• Senior management has seen other

crises• We acted decisively:

• Assessed customer demand• Workforce adjustment• Manufacturing capacity adjustment• Capex reduction

Talented employees• Dedication• Resilience• Manufacturing excellence

READY TO ADAPT QUICKLY TO CHANGING CIRCUMSTANCES

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CONCLUSION – NOT OUR FIRST RODEO

Better equipped than before• Solid financial position• Experienced management team • Strong and diversified order book

Ready to be opportunistic• Open to M&A and contract opportunities• Maintaining our disciplined approach.

LARGE COMMERCIAL AIRCRAFT DELIVERIES

Covid-19

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NON-IFRS FINANCIAL MEASURES

The information included in this presentation contains certain financial measures that are not prescribed by InternationalFinancial Reporting Standards (“IFRS”) and are not likely to be comparable to similar measures presented by otherissuers.

EBITDA - Earnings before financial expenses, income tax expense and amortization expense.

Adjusted EBITDA - EBITDA as defined above excluding non-recurring items.

Adjusted Operating income – Operating income excluding non-recurring items.

Adjusted net income - Net income excluding non-recurring items net of taxes.

Adjusted earnings per share - Diluted earnings per share calculated on the basis of adjusted net income.

Free cash flow - Cash flows related to operating activities, less additions to property, plant and equipment and netincrease in finite-life intangible assets.

Refer to the Corporation’s MD&A for further details

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THANK YOUFor more information:ir@herouxdevtek.com

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ADDITIONAL INFORMATION - COMPETITIVE LANDSCAPE

#3

#2

#1

Mar

ket S

egm

ent P

enet

ratio

n

$500 M $1 B

#4

$100 M

Landing Gear – US$3.1B Aerospace Actuation - US$7.4B

18%

17%

9%

7%5%4%

3%3%

3%2%

2%2%2%

21%

Collins

Transdigm

Woodward

Moog

ParkerCurtiss Wright

LiebherrTriumph

Meggitt

SafranUmbra

NabtescoHoneywell

2%Eaton 1%HDI Spain

Other

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ADDITIONAL INFORMATION - DIVERSIFIED CUSTOMER BASE

DEFENCE COMMERCIAL

TIER 1*

TIER 2

* Includes end-users

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ADDITIONAL INFORMATION HÉROUX-DEVTEK FY 2020 REVENUE MIX

27%

5%

5%

3%12%

24%

14%

10% Large Jets

Business Jets

Regional Jets

Helicopters

Others

Transport

Fighters

Helicopters

DEFENCE / COMMERCIALLarge Jets• Boeing 787, 777, 777x• Airbus A220, A320, A330, A340, A350

Business Jets• Learjet 40/45, 70/75• Embraer Legacy, Praetor• Dassault Falcon 6X

Regional Jets• Embraer E2 Jet• Saab 340, 2000• Sukhoi Superjet

Civil Helicopters• Bell platforms• Sikorsky S92• Airbus H-175• Leonardo AW609

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ADDITIONAL INFORMATION HÉROUX-DEVTEK FY 2020 REVENUE MIX

27%

5%

5%

3%12%

24%

14%

10% Large Jets

Business Jets

Regional Jets

Helicopters

Others

Transport

Fighters

Helicopters

DEFENCE / COMMERCIAL

Military Transport Aircraft• A400M• Boeing KC-135R• Embraer KC-390• Lockheed C-130• Leonardo C-27J• Airbus C235, C295

Fighter Jets• Lockheed F-35• Boeing F-18 and F-15• Saab Gripen E• Eurofighter• BAE Hawk

Military Helicopters• Boeing CH-47• Lockheed CH-53K and H60• Leonardo AW-101, AW-159