Appointments &
Positions Held
Positions Held Year
Association Curator, Department of Botany, Smithsonian Institution1966 - 1969
Scientist-in-Charge, Smithsonian Biological Survey, Dominica1967
Lecturer, Advanced Seminar for Tropical Botany, NSF-sponsored at University of Miami and Fairchild Tropical Garden1969 - 1970
Curator, Department of Botany, Smithsonian Institution1970 - 1985
Executive Director, Association for Tropical Biology, Inc.1969 - 1971
Chairman, Department of Botany, Smithsonian Institution1970 - 1976
Director, Endangered Species Program, Smithsonian Institution1978 - 1980
Secretary-General, International Union of Biological Sciences (IUBS)1976 - 1985
President, Association for Tropical Biology, Inc.1977 - 1979
Director, Office of Biological Conservation, Smithsonian Institution1978 - 1983
Senior Scientist, Smithsonian Institution1984 - 1985
President, Edward S. Ayensu Associates Ltd1985
Chairman, Congress Committee, Pan African Union for Science and Technology1987 - 1990
Senior Advisor to the President on Strategic Planning and Policy Development, African Development Bank1988 - 1990
Director, Central Projects Department, African Development Bank1989 - 1990
President, Pan African Union for Science and Technology1990
Vice-Chairman, Scientific and Technical Advisory Panel, Global Environment Facility (G.E.F.)1991 - 1997
Chairman and Member, World Bank Inspection Panel1998 - 2003
Chairman, Council for Scientific and Industrial Research (CSIR)2001 - 2010
Chairman, Haber Mining Ghana Limited2005 - 2009
Chairman, Sustainable Forestry Management Ghana Limited2007 – 2009
Chairman, Africa Practice, Ghana2009
Vice President, Energy Globe Foundation2012 - 2013
Chairman, African Institute of Mathematical Sciences (AIMS) Ghana2012
President, Energy Globe Foundations2013
Advisory Panel for Systematic Biology, National Science Foundation
Board of Trustees, Inter-Future, New York City
Board of Science and Technology for International Development (BOSTID), U.S. National Academy of Sciences (NAS)
U.S. Committee, International Union of Biological Sciences (IUBS)
Serves on Panels at the U.S. National Academy of Sciences and the State Department on science policy in developing countries
Visiting Professor, University of Ghana
Adjunct Professor, Union Graduate School, Antioch College
External Examiner, University of Cape Coast, University of Maryland and George Washington University
Co-Chairman, Panel on Tropical Economic Plants, National Research Council / NAS
Member, Panel on Sri Lanka Natural Products Development, NAS
Honorary Consultant and Member of Research Committee of the Natural History Museum, University of Ife, Nigeria
Honorary Consultant and Associate Research Fellow, Ghana Institute of Clinical Genetics
Member, Scientific Advisory Committee, Pacific Tropical Botanical Garden, Hawaii
Member, U.S. Delegation to the XIX General Assembly of IUBS, Bangalore, India
Member, U.S. Delegation to the Special Working Session of the Parties to the Convention on International Trade in Endangered Species of Wild Fauna and Flora, Geneva, Switzerland
Rapporteur, Advisory Committee for the General Information Programme, UNESCO
Chairman, International Council for Scientific Unions (ICSU) Committee on Biological Sciences and Agriculture
Board of Trustees, Kwame Nkrumah Memorial Lectures Fund and University of Cape Coast Endowment Fund
Member, UNESCO General Information Programme UNISIST II Conference Programme Committee
Vice-President and Member, International Council for Development of Underutilized Plants, The Asia Foundation
Chairman, Ghana Government Committee to Review the Research Function of the Council for Scientific and Industrial Research
Member, Ethnobotany Specialist Group, Species Survival Commission
Member of SSC Botanical Inventory of Tropical Rainforest Task Force
Vice-Chairman, Advisory Committee on the Sahel (ACOS), Sahel Regional Aid Planning and Coordination, BOSTID/NAS
Consultant to the International Finance Corporation (IFC, World Bank, on agro-industries in developing countries
Chairman, Panel on Firewood Crops: Shrub and Tree Species for Energy Production, BOSTID/NAS
Member, International Commission on the Long-Term Perspectives of the Onchocerciasis Control Programme in West Africa
Member, Harvard University's Arnold Arboretum Visiting Committee
Vice-Chairman, ICSU's Inter-Union Commission on the Application of Science to Agriculture, Forestry and Aquaculture
Member, Conservation Committee, American Orchid Society
Smithsonian Commissioner, International Convention Advisory Commission
Smithsonian Commissioner, Species Survival Commission
Chairman, African Biosciences Network of the International Biosciences Networks (UNESCO-ICSU)
Member, Administrative Council, Centre Mondial-Informatique et Ressources Humaine (CM-IRH)
Advisor to the President on Third World Relations, CM-IRH
Senior Advisor to the Rector of United Nations University
Member, Scientific Advisory Council, World Wildlife Fund - U.S.
Councillor, World Council for the Biosphere - International Society for Environmental Education
University of Ghana Distinguished Professor
Scientific Advisor, Curious Research Corporation
Senior Advisor, World Commission on Environment and Development
Senior Executive Advisor, Capital Profima
Expert Advisor to the Inter-Action Council on Environment, Population and Development
Member, Program Review Board - USA for Africa
Chairman, Congress Committee, Pan-African Union for Science and Technology
Senior Advisor to the President of the African Development Bank
Member, World Bank and UNDP Commission on Energy Sector Management Assistance Programme (ESMAP)
Special Advisor, United Nations Conference on Environment and Development (UNCED)
Vice-Chairman, Scientific and Technical Advisory Panel of the Global Environment Facility (GEF)
President, Energy Globe Foundation (EGF)
Key Advisor to CEO of AngloAmerican
Advisor to Presidents and State Governments