The National Training and Technical Assistance Center for Child, Youth, and Family Mental Health (NTTAC) supports the development and implementation of systems of care (SOC) for youth with serious emotional disorders (SED) and their families. This article presents results from a process evaluation of NTTAC, conducted to support the Center's quality improvement and contribute to the knowledge base around provision of technical assistance (TA). The evaluation used a mixed methods approach with data collection focused on a defined subset of NTTAC TA recipients-recipients of federal Comprehensive Community Mental Health Services for Children SOC grants. Data sources included coded administrative records from SOC grant sites, administrative data from NTTAC, standardized measures of SOC development, and stakeholder survey data. Results indicate that TA dosage matched needs and goals of TA recipients (SOC sites),