August 2013–to date: Lecturer: Department of Crop and Soil Sciences, Faculty of Agriculture. Kwame Nkrumah University of Science and Technology, Kumasi, Ghana.

August 2011–July 2013: Lecturer: Department of Crop Protection and Environmental Biology, University of Ibadan, Ibadan, Nigeria.

August 2008-September 2009: Teaching Instructor: Department of Zoology, University of Bergen, Bergen, Norway.

June 2000–June 2003: Assistant Research Officer: Institute for Scientific and Technological Information− Council for Scientific and Industrial Research (INSTI–CSIR), Ghana.

September 1997–July 1999: Teaching Assistant: Department of Zoology, University of Ghana. Research on stored pulses and grain.

August 1993–October 1994: National Service Personnel: Research and Teaching Assistant, Department of Zoology, University of Ghana, Legon. 

August 1993–October 1994: Research Technician: E.E.C./O.D.A./N.R.I./University of Ghana Maize Stackburn Project.