TAC was part of the evaluation team for four Substance Abuse and Mental Health Services Administration (SAMHSA) homeless grant programs: Grants for the Benefit of Homeless Individuals (GBHI), Services in Supportive Housing (SSH), Cooperative Agreements for the Benefit of Homeless Individuals (CABHI), and Projects for Assistance in Transition from Homelessness (PATH). TAC provided hands-on expertise in the development and implementation of data collection tools and processes, with a particular emphasis on fidelity implementation of permanent supportive housing and evidence-based clinical and wraparound support services at grantee sites, and led instrument development and data collection for a sub-study on evidence-based behavioral health services interventions implemented with homeless populations. TAC was subsequently part of the evaluation team contracted by SAMHSA in 2016 for the national evaluation of its CABHI grants. TAC again played a lead role in assessing grantees’ implementation of evidence-based practices for people experiencing homelessness with mental and/or substance use disorders, while also supporting grantees to strengthen their local evaluations and participate in cross-site data collection activities.