This article describes an assessment process of the statewide capacity for integrating positive behavior supports (PBS) into the policies and practices of service delivery systems that provide support for individuals with developmental disabilities who present challenging behaviors. A multicomponent needs assessment process was conducted to determine the capacity of systems in the Commonwealth of Virginia that provide services to individuals who present challenging behaviors. The process was designed to use a seven-step procedure incorporating qualitative and quantitative data collection strategies. Three interrelated studies were conducted to assess the use of PBS and PBS-related training needs across Virginia's service delivery systems (i.e., early intervention, school, and adult). Results of these studies indicate a need for comprehensive training, refresher training, and improved collaboration among providers across Virginia's service delivery systems.