DEFSEC TECHNOLOGIES — Regulatory Filings 2024

Jul 25, 2024

OFFICER’S CERTIFICATE

TO: British Columbia Securities Commission Alberta Securities Commission The Manitoba Securities Commission Financial and Consumer Affairs Authority of Saskatchewan, Securities Division Ontario Securities Commission Office Of The Superintendent Of Securities, Service Newfoundland And Labrador Nova Scotia Securities Commission New Brunswick Financial And Consumer Services Commission Office Of The Superintendent Of Securities, Prince Edward Island

RE: Annual and Special Meeting of the Shareholders of KWESST Micro Systems Inc. (the “Corporation”) to be held on August 26, 2024 (the “Meeting”)

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With reference to National Instrument 54-101 ― Communication with Beneficial Owners of Securities of a Reporting Issuer (“ NI 54-101 ”), the undersigned, Kris Denis, Chief Financial Officer of the Corporation, in such capacity and not in his personal capacity, certifies for and on behalf of the Corporation, that:

1. in accordance with the requirements set out in section 2.20(a) of NI 54-101, arrangements have been made to have the proxy-related materials for the Meeting sent in compliance with the applicable timing requirements in sections 2.9 and 2.12 of NI 54-101;

2. in accordance with the requirements set out in section 2.20(b) of NI 54-101, arrangements have been made to carry out all of the requirements of NI 54-101 in addition to those described in paragraph 1 above; and

3. the Corporation is relying upon section 2.20 of NI 54-101 in connection with the Meeting.

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DATED as of the 25[th] day of July, 2024.

KWESST MICRO SYSTEMS INC.

Per: (signed) Kris Denis Name: Kris Denis Title: Chief Financial Officer

Certificate of Abridgement