 In July 1995, Bloom began serving as the Acting Executive Director of the Harvard Institute for International Development.In July 1996, he served as the Deputy Director, while simultaneously serving as the Director of the Education and Social Development Group, remaining there through June 1999.Following the end of the 1996 academic year at Columbia, Bloom joined the staff of Harvard School of Public Health, where he served as the Professor of Population and Health Economics for three years, before being named the Clarence James Gamble Professor of Economics and Demography, where he has remained since June 1999.