Since 2018, TAC has provided TA and training support to help Washington State implement evidence-based supportive housing and supported employment services as part of the Foundational Community Supports (FCS) program approved by CMS in the state’s Medicaid 1115 Demonstration waiver. TAC has provided policy support for leadership within the Health Care Authority’s Policy and Behavioral Health Recovery divisions and the Aging and Long-Term Support Administration within the Department of Social and Health Services on long-term sustainability and effectiveness of the FCS supportive housing benefit. We have engaged stakeholders to support collaboration at the state and local levels between Medicaid, behavioral health, and housing and employment systems, and have conducted provider-level training on evidence-based supportive housing service delivery.