Professor of Environmental Studies, University of Wisconsin-Madison
Research Associate, Centre for Development Studies, University of Cambridge
Professor (retired) of Animal Genetics & Agriculture, University of British Columbia & UN FAO
Former Director of the Royal Botanic Gardens, Kew
Former Chief Technical Adviser (Wildlife Conservation), UN Food and Agriculture Organisation and UN Development Programme
Executive Director, WSP International
Retired executive with 46 years experience in humanitarian work
Professor of Theology and Ecology, Duke University