Greg served as a U.S. Peace Corps volunteer from 2006-2009 in Mikalanga, Tanzania where he taught Biology and English at Mikalanga secondary school. He also worked as the school librarian, improving access to books at the school and led several conferences on health education and youth empowerment. He received his B.A. in Biology and Philosophy from Carleton College in 2006, M.D. from Harvard Medical School in 2015, and completed internal medicine residency in 2018 at University of Chicago. He currently provides primary care in Willimantic, CT.