In response to the large numbers of senior center clients who suffer from untreated depression, we have partnered with the NYC Department for the Aging (DFTA) to develop SMART-MH, a community care model that can be embedded in senior centers to improve recognition, referral, and adherence to depression treatment. The investigators also developed and tested Engage, a stepped-care therapy streamlined to use "reward exposure" as its principal intervention based on the assumption that dysfunction of the reward networks is central to the pathogenesis of depression. With senior center partners and a mobile technology team, the investigators redesigned Engage-M so that it can be used in a group format by licensed clinical social workers (LCSWs) of Senior Centers. Mobile technology provides probes for client adherence and offers to therapists easy to review summary records of mood, activity, and social interaction that can be used to target their sessions. The investigators have integrated SMART-MH and Engage-M into a comprehensive community care model "Reaching and Engaging Depressed Senior Center Clients" (REDS).