From 29-30 September the Centre for European Peace and Security Studies of the IFSH with financial support from the Friedrich-Ebert-Foundation organized an international workshop on “EU Security Governance in the Post-National Constellation: Conceptual, Empirical and Practical Challenges”. The event brought together 25 scholars and experts from universities, think-tanks, and EU institutions to discuss conceptual perspectives, empirical developments and practical-normative problems of EU security governance. In a first step, two conceptual panels dealt with the state of the scholarly debate on the concept of security governance and potential trade-offs of post-national security policy as well as with specific manifestations of security governance in the EU and in comparison to other regions. The next three panels scrutinized concrete characteristics and problems of EU security governance in counterterrorism, the comprehensive approach in CSDP operations, and member states’ implementation of the whole-of-government approach. The concluding roundtable debated the conceptual and practical relevance and appropriateness of EU security governance on the basis of the foregoing discussions.