He received his Ph.D. in Counseling Psychology from Boston College. He completed a clinical psychology residency at Harvard Medical School and a postdoctoral research fellowship at Brown University. His research focuses on understanding the effects of social, psychological, and cultural determinants of health for lesbian, gay, bisexual, and transgender (LGBT) individuals and racial/ethnic minorities as well as factors that promote their resilience. Dr. Mereish is currently working on three NIH-funded studies examining the effects of minority stress on mental health and substance use among sexual minority youth and adults. Dr. Mereish is also a licensed psychologist in the District of Columbia.