This is intended to be a lessons learned article that describes our experiences with implementing an EBP within the context of three different types of organizations. The purpose of the article is to reflect on and describe our experiences, contribute to the knowledge base about real-world organizational and external implementation issues, and provide guidance to practitioners on practical approaches to prevent or address these issues. Although we hope that our findings will provide useful insight to other organizations intending to implement TPP EBPs, as a singular case study of our experiences, the findings are not necessarily generalizable to implementers in other settings. In addition, the findings presented here are based on input from a narrow group of people—the core individuals involved in evaluation and programming at the funded agency. And finally, because the purpose of our formative evaluation process was to assess and address perceived problems rather than identify actual problems, those issues identified may be subjectively biased.