DEFSEC TECHNOLOGIES — Proxy Solicitation & Information Statement 2026

Jan 14, 2026

OFFICER'S CERTIFICATE

TO: Ontario Securities Commission

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

RE: Annual and special meeting of the shareholders of DEFSEC Technologies Inc. (the "Corporation") to be held on February 12, 2026 (the "Meeting")

With reference to National Instrument 54-101 — Communication with Beneficial Owners of Securities of a Reporting Issuer ("NI 54-101"), the undersigned, Jennifer Welsh, Chief Financial Officer of the Corporation, in such capacity and not in her 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 9th day of January, 2026.

DEFSEC Technologies Inc.

Per: (signed) "Jennifer Welsh"
Name: Jennifer Welsh
Title: Chief Financial Office

Certificate of Abridgement