This training is the fourth of six trainings for health professionals and lay workers at the Denis Hurley Centre. The Denis Hurley Centre serves thousands of homeless, refugees, and people living with HIV and TB. Attendees of this training will gain knowledge about treatment and management of substance use disorders and mental illnesses. Those who attend this training will learn how to screen for mental health and substance use disorders and interpret the results of screening tools in order to improve HIV treatment outcomes through detection and intervention of co-occurring alcohol and other drug use among people living with HIV.