Purpose: Broker professionals serve an important intermediary role in improving service access for youth but are often trained separately from clinicians. Community-Based Learning Collaboratives (CBLCs) include specific training/implementation strategies to foster collaboration and build community capacity for EBPs. Methods: The current study examined changes in trauma-related knowledge, practices, organizational culture, and interprofessional collaboration among 63 brokers. Brokers reported significant positive changes in trauma-related knowledge, practices, organizational culture, and interprofessional collaboration following CBLC participation. Results: Hierarchical regression analyses indicated statistically significant improvements in knowledge of treatment planning/case monitoring (r = .41) and organizational culture (r = .30) as significant predictors of changes in brokers’ use of child trauma evidence-based practices following CBLC participation. Discussion: Findings emphasize tailoring training to include topics and strategies most relevant to participants’ day-to-day responsibilities.