Greenberg’s research and practice has focused on community initiatives, neighborhood development, and affordable housing. He is currently the principal investigator for three studies of place-based initiatives: Chicago’s New Communities Program, the U.S. Department of Housing and Urban Development’s (HUD’s) Jobs-Plus Pilot Program, and the NYC Change Capital Fund’s Economic Mobility Initiative. The Chicago study combines field research, quantitative analyses of local conditions, and a survey of organizational networks to illuminate how community groups work together to improve neighborhoods; the Jobs-Plus program helps public housing residents obtain jobs and advance in society; and the Change Capital Fund seeks to help community organizations in New York launch data-driven strategies to fight poverty. In the past, Greenberg has led MDRC’s contribution to the evaluation of HUD’s flagship public housing redevelopment program (the Choice Neighborhoods Initiative), directed research concerning Jobs-Plus through the Social Innovation Fund, directed qualitative research for the Opportunity NYC-Family Rewards demonstration project, and led field research on MDRC’s study of revitalization efforts in Camden, NJ. Before joining MDRC, he directed policy and advocacy for a coalition of 90 community housing organizations in New York City and organized with homeless men and women in the municipal shelter system. He holds a PhD in urban and regional planning from MIT, where he received a National Science Foundation fellowship and a dissertation award from HUD. He is currently a part-time faculty member at Milano, the New School for Management and Urban Policy.