This guide introduces concepts from the Sexual and Gender Diversity Learning Community (SGDLC) workshop: a 7-hour training for mental health providers and administrators on LGBTQ+ affirming mental health care. The objective of this guide is to provide ways to improve mental health providers’ and administrators’ comfort, knowledge, and skill with LGBTQ+ affirmative mental health care.This work is supported under the University of Maryland Prevention Research Center Cooperative Agreement U48DP006382 from the Centers for Disease Control and Prevention (CDC)