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DSEI

DSEI Event Page Header

Excel - London

September 9, 2025 - September 12, 2025

Defence and Security Equipment International or DSEI is the world’s largest land, sea and air biennial defence and security exhibition, bringing together senior international trade and military experts from across the entire supply chain. L3Harris has been proudly serving customers in the UK for over 100 years, delivering unique capabilities across land, air, sea, space and cyber. From our 15 U.K. sites we deliver airborne systems, commercial pilot training, tactical cyber and electronic warfare, secure communications, expanded autonomous EOD systems, air surveillance and defence, warship monitoring and control systems, cyber intelligence operations and autonomous surface vehicle technology.

39.5K

Exhibition Space (Sq. M)

1700+

Exhibitors

77K+

Total Attendees

130+

Official Delegations

400+

Speakers

3000+

Global VIPs

UK Sizzle

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