Defence & Security Equipment International (DSEI) London

The Defence & Security Equipment International, commonly referred to as "DSEI", is a prestigious trade fair specialising in defence and security. Established in London in 1999, DSEI has become an essential gathering for industry experts and decision-makers from around the globe. Held biennially in September, the fair draws visitors and exhibitors from a diverse range of sectors. It is organised by Clarion Events Ltd, a company renowned for its expertise in managing large-scale events. Central to DSEI is the focus on contemporary military capabilities and the dynamic between providers and stakeholders within this niche sector. The event addresses a broad spectrum of issues, spanning from border controls, organised crime, and illicit trade, to terrorism. Exhibitors present cutting-edge products and services tailored to the evolving needs of the defence and security industries. A notable feature of the fair is the chance for industry professionals to stay abreast of current and emerging trends and to interact directly with manufacturers. Participating exhibitors hail from varied sectors, including defence firms and security technology providers. DSEI attendees comprise decision-makers, strategic investors, and specialists from the defence and security arenas. Hosted at the striking ExCeL London, this modern exhibition and conference centre is situated in the heart of London. Owing to its prime location, ExCeL London is conveniently accessible both by public transport and by car, making it an optimal venue for business interactions and networking.

The Defence & Security Equipment International (DSEI) will take place on 4 days from Tuesday, 09. September to Friday, 12. September 2025 in London.