The document summarizes a case study of the successful 2014 merger between two New York City human services organizations - Services for the UnderServed (SUS) and Palladia. It discusses the challenging human services landscape, factors that contribute to successful nonprofit mergers based on literature, and the context and process of the SUS-Palladia merger. Keys to the merger's success included strong leadership focused on mission, prior familiarity between partners, third-party support, capable staff, and respect for organizational culture. Lessons learned were that integrating culture takes time, investing in boards is important, partnerships with funders are critical, underfunded payment rates limit innovation, and outside assistance is essential.