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.