Distinguished Professor
University of South Florida
Tampa, FL
Project Engineer, University of Illinois, Urbana Champaign (UIUC- ISTC), Champaign, IL
Associate Professor
University of Houston
Houston, TX
International Consultant, UNFAO
Republic of Rwanda
Professor, Federal University of Tocantins (UFT), Brazil
Professor, University of Delhi
India
Professor Emeritus, Northeastern University, Boston, MA
Czech University of Life Sciences Prague, Czech Republic
Professor, University of Guanajuato, Mexico