The EUISS is an autonomous agency with full intellectual freedom. As a think tank it researches security issues of relevance for the EU and provides a forum for debate. In its capacity as an EU agency, it also offers analyses and forecasting to the High Representative for Foreign Affairs and Security Policy, Federica Mogherini.
According to the Council Joint Action of 20 July 2001, which established the EUISS, the mission of the EUISS is to 'contribute to the development of the CFSP, in particular the CSDP, in coherence with the European Security Strategy. To that end, it shall conduct academic research and policy analysis, organise seminars and carry out information and communication activities in that field. The Institute's work shall inter alia contribute to the transatlantic dialogue. It shall involve a network of exchanges with other research institutes and think-tanks both inside and outside the European Union.' 
Communications and outreach activities are central to the work of the EUISS in fulfilling its mission to contribute to Europe’s strategic debate. In addition to frequent contributions to print and broadcast media in a variety of languages made by resident Research Fellows, the EUISS maintains a strong web presence (website re-launched in 2011) and distributes its research via a regular email alert. Making use of social media tools, the EUISS maintains active Facebook and Twitter accounts, as well as Flickr and Vimeo channels.
European Strategy and Policy Analysis System (ESPAS)