About Exhibition Cansec Ottawa 2026 will be held from 27th - 28th May 2026 at EY Centre in Ottawa, Ontario, Canada. This is the largest global defence and security trade show. It showcases leading-edge technologies, products, and services for land-based, naval, aerospace, and joint forces military units. It is expected to attract over 12,000 attendees and feature over 300 exhibitors from around the world. Cansec Ottawa 2026 provides a valuable platform for industry professionals from around the world to network and build relationships.