The Metropolitan Boston Complex Trauma Treatment Initiative (MB-CTTI) is a mobile service network delivering evidence-based trauma interventions to high-risk and underserved complex trauma-exposed children and youth ages 0-21 living in the Metropolitan Boston region. There are several groups of children and youth that we are prioritizing for services in this project, including trafficked and exploited youth, youth in state custody, LGBTQ youth, youth from military families, and urban youth of color. The primary aim of the MB-CTTI is to reduce behavioral health disparities among these consumer groups. The work of the MB-CTTI includes delivery of clinical services, including individual and family therapy, to children, youth, and their families, as well as consultation and training to programs partners. We deliver trauma-informed interventions, consultation, and training to a range of service settings, including outpatient, community based, and residential settings. A central goal of the MB-CTTI is to enhance the infrastructure and capacities of program partners in order to support sustainability of trauma EBPs over time.