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Ernst & Young LLP

Calgary City Centre

2200 215 2nd Street SW

Calgary T2P 1M4

Tel: +1 403 290 4100

Fax: +1 403 290 4165

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Alberta Securities Commission

British Columbia Securities Commission

Financial and Consumer Affairs Authority of Saskatchewan The Manitoba Securities Commission

Ontario Securities Commission

Financial and Consumer Services Commission, New Brunswick Nova Scotia Securities Commission

Authorité des marches financiers

Office of the Superintendent of Securities, Prince Edward Island

Office of the Superintendent of Securities Service, Newfoundland and Labrador

Stantec Inc.

10220 103 Ave NW

Edmonton AB T5J 0K4

Attention: Theresa B.Y. Jang, Chief Financial Officer

Stantec Inc. - Notice of Change of Auditor

June 1, 2021

Dear Sirs/Mesdames:

In connection with our recent resignation as auditor of Stantec Inc., we acknowledge receipt of the Notice of Change of Auditor, dated June 1, 2021.

We agree with the statements set out in the Notice of Change of Auditor.

If you have any questions or comments relating to this matter, please do not hesitate to contact the undersigned directly at your convenience.

Yours sincerely

Ernst & Young LLP

Chartered Professional Accountants

A member firm of Ernst & Young Global Limited