Degree, University of East Africa, Tanzania; PhD in Population Geography, London University, UK. Formerly: Professor of Geography and Academic Dean, University of Dar es Salaam, Tanzania. With World Vision: 1989, Chairman, advisory council, Tanzania; 1992-98, Vice-Chairman, International; since 1998, current position. Formerly, Vice-Chairman, International Fellowship of Evangelical Students. Formerly, Director, International Bible Society, East and Southern Africa. Formerly, President, Organization of Social Science Research in Eastern Africa.