The purpose of this study is to test the feasibility of two types of group therapy sessions. The research is being done because the researchers are trying to learn if these approaches could be used by therapist in the community social service agencies to treat older adults with depression. There are two study groups. One group is a form of group therapy called "Engage-M", which encourages subjects to engage in physical and social activities that they find pleasurable or rewarding. One group is another form of group therapy called, "Wellness in Mind and Body", which focuses on education and de-stigmatization of health and mental health conditions.

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).

The specific aims of this developmental project are to: 1. Finalize the REDS protocol and assess feasibility of training; 2. Prepare an Operations' Manual; 3. Examine reach, feasibility, and acceptability of REDS; 4. Examine engagement of behavioral targets and preliminary effectiveness; and 5. Collect information on REDS cost, barriers to implementation, and potential savings in health care utilization.

The investigators will randomly assign four senior centers to offer either Engage-M (N=40), the treatment offered by REDS (1 individual and 8 weekly group sessions) or 8 group sessions "Wellness in Mind and Body" plus mental health referral (W-MH; N=20). The participants will have clinically significant depressive symptoms (PHQ-9>10) and will be older and middle-aged adults (55+); 12.6% of the NYC senior center clients are aged 55-65 years. Clients will be identified by senior center staff trained in SMART-MH strategies. The investigators will offer additional training to staff of all centers on SMART-MH outreach, depression screening, and treatment engagement. The investigators will train and provide weekly supervision to 2 or more LCSWs per center of the two centers assigned to Engage-M. The investigators will not offer training or supervision to senior center staff leading the groups of W-MH but will provide oversight so that clients receive mental health referrals and are encouraged to attend weekly Wellness group meetings.

Inclusion Criteria:

• 55 years+
• PHQ-9≥10
• English or Spanish speaking
• MMSE ≥ 24
• Capacity to provide written consent for both research assessment and the Engage-M intervention.

Exclusion Criteria:

• Current active suicidal ideation defined by MADRS Suicide Item ≥ 4 (Probably better off dead. Suicidal thoughts are common, and suicide is considered as a possible solution, but without specific plans or intention).
• Presence of psychiatric diagnoses other than unipolar, non-psychotic major depression pr generalized anxiety disorder by SCID-V.
• Severe or life-threatening medical illness (e.g. end-stage organ failure).

The Center will share its data via the NIMH Data Archive (NDA). The resource sharing plan is formulated in accordance with the NDA Data Sharing Terms and Conditions. Further, the Center will use NDA technologies to submit data in accordance with the NDA Data Sharing Terms and Conditions.

The investigators will comply with NIMH's procedures for data deposition into NDCT, and will let NDCT policies dictate the timetable upon which and avenues through which others will be allowed to access those data. Investigators will make the dataset available to other researchers after the main results have been published. Investigators will de-identify the data in the final datasets prior to release for sharing. To ensure data and participant security, investigators will make the data available to users only under a data-sharing agreement.

Per NIMH guidelines.

All users will first provide to the ALACRITY Center and the co-Investigators with a proposal of hypotheses, variables needed to test these hypotheses, and plans for dissemination of findings. All users will indicate in a signed document: (1) a commitment to using the data only for research purposes; (2) a plan for securing the data; (3) an agreement to either destroying or returning the data once analyses are completed; and (4) an agreement to not share data with other users and to direct all such requests to The ALACRITY Center.

Findings will be reported in scientific meetings and publications promptly. Consistent with NIH policy, publications will be deposited at PubMed Central. The data from this research will be made available for integration with other datasets of the ALACRITY Center.

Each participant was monitored for adverse events for twelve weeks after the completion of their baseline assessment.