He currently the co-director of the Yale Global Health Justice Partnership, an initiative of the Yale Law School and Yale School of Public Health and the Collaboration for Research Integrity and Transparency, an initiative of YLS, YSPH and Yale School of Medicine. Gregg has worked on public policy on AIDS, tuberculosis and other health issues since 1991 with a series of non-governmental organizations in the USA and abroad, including the AIDS Coalition to Unleash Power, the Treatment Action Group, Gay Men’s Health Crisis and the AIDS and Rights Alliance for Southern Africa. In 2008, he was the inaugural recipient of the John M. Lloyd Foundation’s AIDS Leadership Award and was an Open Society Foundation Fellow and a Fellow in the Department of Global Health and Social Medicine at Harvard Medical School from 2011-2012.