Dr. Thoma’s program of research examines the mental and behavioral health of lesbian, gay, bisexual, and transgender (LGBT) individuals. He is a licensed psychologist, and his work focuses on risk for suicidal behavior and prevention of HIV-related sexual risk behaviors among LGBT adolescents. He is currently the Principal Investigator of a National Institute of Mental Health grant to study biological mechanisms of suicidal behavior among sexual minority adolescents, and his recent work has examined mental health disparities between transgender and cisgender youth.