2015 - Present: Distinguished Professor of Operations Research, Air Force Institute of Technology
1994-2015: Professor of Operations Research, Air Force Institute of Technology
1990-1994: Professor of Engineering Management, Portland State University
1989-1991: Collaborator, Safeguards and Security Systems Group N-4, LANL
1985-1990: Associate Professor of Industrial and Operations Management, University of Wyoming
1981-1985: Assistant Professor of Industrial and Operations Management, University of Wyoming
1976 -1981: Assistant Professor of Management Science, Virginia Polytechnic Institute and State University