Nat Colletta, "was founding manager of the World Bank's post-conflict unit and senior spokesperson for the Bank on reconstruction and peace building in societies emerging from violent conflict and war from 1998-2001. Before this, he led the Bank's first involvement in demobilization and reintegration of ex-combatants, and community social and economic reintegration programs for internally displaced persons and refugees. He served as head of the Bank's war-to-peace transition team for Africa, and was team coordinator for the Bank-wide post-conflict reconstruction network, which launched many initiatives in collaboration with other UN agencies, donors and NGOs.
"Dr. Colletta, formerly a professor of Sociology, Anthropology and International Education and Development, joined the Bank in 1977. Prior to that he taught at SUNY Buffalo and was a visiting Fulbright-Hayes Lecturer at the University of Malaysia. He also served in the Peace Corps in Micronesia. His career at the Bank has included senior specialist positions in the social sectors and social policy for Asia and the Pacific, South Asia and Africa, as well as secondments with the Government of Indonesia and the United Nations Children's Fund (UNICEF).
"He is currently teaching the Center for Peace and Conflict Resolution, American University and Georgetown School of Foreign Service. He also provides advisory services in conflict prevention and post conflict reconstruction to governments, corporations, and the international donor community.“ 
- ”Biography”, Accessed January 2007.