Gregg Greenough graduated from Case Western Reserve University School of Medicine and completed an emergency medicine residency at UCLA.
After completing a Master's of Public Health degree from Johns Hopkins University School of Public Health he joined the faculty at the University of Massachusetts before returning to Johns Hopkins.
Gregg held a joint appointment as assistant professor in the Schools of Medicine and Public Health where he taught in the Humanitarian Assistance track and was the Deputy Director of the School's Center for Refugee and Disaster Response.
Gregg is now the Research Director at the Harvard Humanitarian Initiative where he holds a joint appointment in Emergency Medicine at Brigham & Women's Hospital.
has worked on public health issues in conflict-affected populations in the Balkans, the Palestinian Territories, Tanzania, and refugee camps worldwide, and recently with the American Red Cross
on the response to hurricanes Katrina and Rita.