Dr. Marwan Haddad serves as Medical Director of the Center for Key Populations. He is board certified in Family Medicine and certified by the American Academy of HIV Medicine as an HIV specialist. Dr. Haddad received his Bachelor of Arts degree from Harvard College and his Doctor of Medicine degree from McGill University. He completed his residency in Family Medicine at the University of Toronto and obtained his Master’s in Public Health from Johns Hopkins University. Since January 2012, Dr. Haddad has led the Weitzman ECHO Key Populations and ECHO Substance Use and Medications for Opioid Use Disorder (MOUD) education programs, based at the Weitzman Institute. He is a sought-after consultant nationally and internationally on caring for people with HIV/AIDS and others whose life circumstances and health conditions make them among the most vulnerable populations worldwide.