Cegea- Universitat Politècnica de València

Professor Emeritus of Agricultural Economics, University of Nebraska-Lincoln

Regents Professor and Bill Fitzwater Cooperative Chair Oklahoma State University

Faculty of Agriculture, Aristotle University of Thessaloniki

Simon Diedong Dombo University of Business and Integrated Development Studies, Wa …

Romanian Academy, Iasi Branch, "Gh. Zane" Institute of Economic and Social Research …

Euricse, European Research Institute on Cooperative and Social Enterprises

Visiting Scholar of Agricultural Economics, University of Missouri-Columbia

Lecturer of Agricultural Extension and Education, University of Zabol

Lecturer of Agricultural Education, Rivers State University, Port Harcourt