Objectives: To assess the preliminary effectiveness of Meaning-Centered Men's Groups (MCMG), a 12-session existentially-oriented, community-based, psychological group intervention designed to enhance psychological resiliency and prevent the onset or exacerbation of suicide ideation among men who are concerned about or struggling with the transition to retirement.Methods: We recruited 30 men (n= 10 per group), 55 years and older (M= 63.7, SD= 4.1) from community settings to participate in a course of MCMG to be delivered in a community center. Participants completed eligibility, pre-, mid-, and post-group assessments of suicide ideation and psychological risk and resiliency factors.Results: Participants experienced significant increases in attitudinal sources of meaning in life, psychological well-being, life satisfaction, retirement satisfaction, and general health, and decreases in depression, hopelessness, loneliness, and suicide ideation.Conclusions: Preliminary findings suggest that MCMG is a novel men's mental health intervention that may help to enhance psychological well-being and potentially reduce the severity or prevent the onset of symptoms of depression, hopelessness, and suicide ideation.Clinical Implications: Upstream psychological interventions may serve an important role in mental health promotion and suicide prevention with potentially vulnerable individuals facing challenging life transitions.