King County will implement Cooperative Agreements to Benefit Homeless Individuals with two comprehensive behavioral health organizations to provide Assertive Community Treatment (ACT) and Housing First permanent supportive housing in geographically underserved regions. Program participants will be single adults experiencing chronic homeless and co-occurring serious mental illnesses and substance use disorders (SUDs). Approximately 350 individuals will be identified, screened and referred by King County's Coordinated Entry for All (CEA) program to SHARP over the life of the grant. This is expected to result in 224 individuals outreached and 140 individuals enrolled in intensive services. Participants will all have serious mental illnesses and co-occurring SUDs. SHARP will provide: 1) outreach, engagement, screening, and clinical assessment through an ACT model; 2) direct treatment, with trauma-informed practices, to address COD by the ACT team; 3) case management, ACT, SOAR methods, and supportive housing to enroll participants in SSI/SSDI, Medicaid, and other benefits and retain participants in housing and services; 4) peer recovery support to facilitate COD recovery as part of the ACT team; 5) collaboration across care entities to build bridges among partners in care; 6) recovery support services within ACT to improve retention and continue treatment gains; 7) Housing First permanent supportive housing through CEA; and 8) implementation of a steering committee for SHARP that will meet quarterly and monitor the goals and objectives of the program. Program objectives will include the degree to which referrals are outreached and enrolled, participants obtain Medicaid and other benefits, interventions have been implemented to fidelity, and participants increase housing stability while reducing COD symptoms, and use of crisis and emergency medical and psychiatric services, sobering and detox services, and jail.