During a time of increased regional conflicts and global instability, US Security Sector Reform (SSR) applies a whole of government approach to strengthen host nation (HN) governments and security forces to decrease sources of instability. Significant to the Department of Defense's effort in support of SSR, is special operations engagement with HN security forces. This book analyzes recent special operations engagement in Mali and the Philippines. Through that analysis, enduring engagement, special operation engagement campaigns, unity of effort, Theater Special Operations Command (TSOC) forward commands, and HN partner selection are key identified engagement planning considerations. A review of current special operation campaigns and initiatives highlight opportunities for TSOCs to implement these considerations though special operation engagement campaigns.