LUK, Inc.’s Family Intervention and Resiliency Support Team (FIRST) will provide services to 200 families (100 per year for two years) that include a caregiver/parent with a serious mental illness (SMI), a child with a serious emotional disturbance (SED), and/or caregiver or child with SMI/SED and substance use disorder (i.e., co-occurring disorder [COD]). Families will reside in Worcester County, Massachusetts, and will be involved with or at risk of becoming involved with child welfare. FIRST will provide four evidence-based practices: Attachment, Self-Regulation, Competency (ARC), ARC Grow for caregivers, Motivational Interviewing (MI), and Multidimensional Family Recovery (MDFR), all of which complement and build upon each other. Services will be implemented by a mobile team consisting of a clinician and additional staff whose expertise matches the needs of the family (e.g., youth support, parent support, recovery support). Project goals are: (1) To provide treatment to caregivers whose children are at risk due to the caregivers’ SMI or COD; (2) To provide treatment to youth with an SED or COD; and (3) To enhance the infrastructure of LUK’s Behavioral Health Services. Our objectives include enhancing caregiver/youth functioning, improving symptoms, improving coping, satisfaction with telehealth services, and supporting staff wellness. FIRST will attend to the needs of providers by supporting self-care and providing training on secondary traumatic stress. We will achieve these goals and objectives by implementing a number of activities, including trauma-informed screening, assessment, diagnosis, treatment planning and delivery, clinical and recovery support services, and staff training. Home-based in-person and telehealth services will be offered.