International Institute of Tropical Agriculture (IITA)

Ghana Science Association (Member, Advisory Committee, Journal of Ghana Science Association (2011-)

University Teachers Association of Ghana (UTAG

Co-opted member, Scientific Advisory Committee, IFS, 2006-

African Crop Science Society, 2005-

West African Science Association, 1984-

Ghana Society for Microbiology, 1986-

World Rhizobium Ecology Network (Headquarters, University of Hawaii NifTAL Project); collaborator for Ghana, 1987-1991

American Society for Microbiology, 1997-99; 2006-

American Society of Agronomy, 1997-99; 2006-

Crop Science Society of America, 1997-99; 2006-

Ghana Institute of Biology 1998-