After completing his PhD at Oregon State University, Dr. Mitchell received postdoctoral training at the Center for AIDS Intervention Research (CAIR) where he sought to unravel how relationship dynamics (e.g., sexual agreements) could be used to bolster HIV prevention with male couples, particularly when combined with other biomedical and behavioral preventive approaches, including couples testing, PrEP and nPEP. As a faculty member, he is continuing to build his program of research to develop and test novel and innovative HIV and substance use preventive interventions with these vulnerable populations (e.g., R34MH102098, R34MH105202, R01DA040541, R21MH111445), and to expand research initiatives for improving the health and relationships among the LGBTQ population.