· Natural Resources Institute, University of Greenwich, Chattaham Maritime, UK Jan.-March, 2001
· Ahmadu Bello University, Zaria, Nigeria 1989-1995
· Virginia State University, Petersburg, USA 1983 – 1984
· Virginia State University, Petersburg, USA 1982 ‑ 1983
· Ahmadu Bello University (Federal College of Education) 1976 – 1979
