The Maidan Revolution in Ukraine created an opportunity for change and reforms in a system that had resisted them for the past quarter century. This report examines Ukraine's security sector, assessing what different institutions need to do and evaluating where gaps exist that preclude these institutions from being effective, efficient, transparent, and accountable. The report's recommendations for reforms in Ukraine's security sector suggest changes to fill those gaps in ways that align with Euro-Atlantic standards and approaches. These include clarifying the roles and responsibilities of the President, Cabinet of Ministers, the Ministry of Defense, and the General Staff; improving coordination and transparency among the security sector ministries and agencies; reorganizing and empowering the Ministry of Defense; and improving Ukraine's capabilities for warfighting.