Résumé : It is frequently noted in the critical literature that elements of migration are increasingly subject to processes of securitization in and by the European Union. However, despite the rather broad claim of increasing securitization such studies tend to be narrow in focus, dealing with one type of security practice, a specific actor or particular site. At the level of the EU this has resulted in a preoccupation with Frontex and border enforcement activities in the Mediterranean region. Although clearly an important actor and site where security is practiced, what is missing is a more thorough examination of the practices that are enacted by other actors in the European Union, not just Frontex alone, in the domain of migration politics and policy. To address these two issues, this dissertation explores the discursive and non-discursive security practices of the European Commission, as well as the Council and EEAS, with focus on external action. This moves the discussion beyond the role of Frontex and border enforcement, as well as providing a clearer picture of the evolution of the EU’s securitarian response to migration.