Established in 1996, Old Pueblo Community Services has delivered housing and support services for people facing homelessness in Pima County. The organization serves various populations, including families, veterans, youth, individuals with mental illness and substance use disorders, and those reentering the community post-incarceration. Services are underpinned by a "Housing First" approach, which provides stable housing as a foundation for addressing additional needs such as mental health, addiction, medical care, income, and education.OPCS currently manages a range of housing models, including bridge, shelter, transitional, and permanent housing. Additional services include substance abuse counseling and life skills programming for both veteran and non-veteran clients.