Dr. Achilles Kallergis is an affiliated Fellow of the Marron Institute, collaborating primarily with Professor Shlomo Angel's Urban Expansion Program. He is also an Adjunct Professor at NYU Wagner where he co-teaches and urban planning course with Alain Bertaud. He recently completed his PhD in Public and Urban Policy at the New School University, where he teaches in the Graduate Program for International Affairs. His research interests include urbanization in the developing world with a particular focus on informal settlements. He has consulted for the Gates Foundation, UN-Habitat and the World Bank and has collaborated with community networks such as Slum Dwellers International and the Asian Coalition for Housing Rights.