Director, Office of Grants and Research, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana

Dean School of Graduate Studies, Kwame Nkrumah University  of Science and Technology, Kumasi, Ghana

Consultant Soil Microbiologist, International Institute of Tropical Agriculture, Ibadan, Nigeria

 Provost, College of Agriculture and Natural Resources, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana

Soil Microbiologist, International Institute of Tropical Agriculture

Ibadan, Nigeria.

Research Assistant at NifTAL Project, Department of Agronomy and Soil Science, University of Hawaii at Manoa, Honolulu

Associate Expert with the Grain Legume Improvement Program (GLIP), IITA, Ibadan, Nigeria

Laboratory Assistant at Guinness Ghana Limited, Kumasi, Ghana

. (On National Service)