[2] The agency is responsible for organising international exhibitions such as DefExpo and Indian participation at overseas exhibitions such as Aero India and DefExpo.

[2] The DEO is also involved in coordinating and the setting-up of "India Pavilion" at major international Aerospace & Defence exhibitions abroad in order to improve the export potenial of the Indian Aerospace & Defence Industry.

[2] DefExpo is India's flagship biennial event showcasing Land, Naval and Homeland Security Systems, first launched in 1999.

[2] DefExpo2020 was held in Lucknow, Uttar Pradesh from February 5th to 8th, 2020.

An investor outreach event 'Invest for Defence' was organised bringing together businesses and investors, with a focus on indigenisation and self reliance in the Indian defence industry, for the first time in the history of the expo.