Adebayo Adedeji "was United Nations Under-Secretary-General and Executive Secretary to the United Nations Economic Commission for Africa until 1991. Before then, he served as Nigeria’s Federal Commissioner (Minister) for Economic Development and Reconstruction for five years (1971-1975), following his tenure as a Professor of public administration and Director of the Institute of Administration at the University of Ife (now Obafemi Awolowo University, Ife-Ife, Nigeria)." 
"Professor Adebayo Adedeji is currently the Executive Director of the African Centre for Development and Strategic Studies (ACDESS), a non-profit think tank based in Nigeria which he established in 1991 after retiring from the United Nations, as well as Chairperson of the African Peer Review Mechanism, an initiative of the New Partnership for Africa's Development (NEPAD) on good governance in Africa...
"In the early 1970s, as Nigeria's Cabinet Minister for Economic Development and Reconstruction, Professor Adedeji was pivotal in the establishment of the Economic Community of West African States (ECOWAS). From 1984 to 1991, he was the Special Representative of the United Nations Secretary-General on Africa’s Economic Crisis, in addition to his responsibilities as the Executive Secretary and Under-Secretary-General of the Economic Commission for Africa (ECA). Since 1998, he has been a member of the Advisory Board of the United Nations African Futures Project, sponsored by the United Nations Development Programme, the World Bank, the ECA and the African Development Bank. In 2002, he was appointed Nigeria’s Special Envoy to Zimbabwe."