Dr. Mereish has years of experience working with clients with varying presenting concerns. These include but not limited to: depression, anxiety, trauma, substance misuse, relationship issues, loneliness, grief, loss, stress, shame, rejection, career and life transitions, identity development, discrimination, and sexual intimacy. 

Dr. Mereish received a Ph.D. in Counseling Psychology from Boston College and a master's in Counseling and Personnel Services from the University of Maryland, College Park. He completed a clinical psychology residency at Harvard Medical School/Cambridge Hospital and postdoctoral clinical work at Brown University's Warren Alpert Medical School. He is a licensed psychologist in Washington, DC. 

Dr. Mereish considers the impact of culture, gender, gender identity, race, and sexuality on wellbeing when working with clients. In addition to his clinical expertise, Dr. Mereish has published over 60 articles and book chapters focusing on LGBTQ and racial/ethnic minority/BIPOC mental health. He has expertise in LGBTQ-competent and affirmative clinical care and has worked at LGBTQ-focused clinics and community organizations, including Fenway Health and the Triangle Partial Hospitalization Program in Boston, MA, and Youth Pride, Inc. in Providence, RI.

Moreover, he has expertise in working with racial/ethnic minority clients. He has worked at the Institute for the Study and Promotion of Race and Culture and the Asian Mental Health Clinical Team at Cambridge Health Alliance/Harvard Medical School.