2007-2008 Dean,
College of Professional Studies,
2004-Present Professor,
Dept. of Mathematics and Computer Science and School of Business, Economics and
Legal Studies, Lake Superior State University, Sault Ste. Marie, Michigan
2001-2004 Professor, Department of
Industrial Engineering and Management Sciences, Northwestern University,
2002-2003 Very Important Visitor, Institute
for Mathematics and its Applications (IMA),
1990-2003 Associate
Professor, Department of Industrial Engineering and Management Sciences,
Northwestern University,
1996-99 Charles Deering McCormick Professor
of Teaching Excellence, Department of Industrial Engineering and Management
Sciences, Northwestern University, Evanston, Illinois
1985-90 Assistant Professor, School of
Industrial Engineering, Purdue University, West Lafayette, Indiana
1988-89 Visiting Assistant Professor,
Department of Combinatorics and Optimization, Faculty of Mathematics,
University of Waterloo, Waterloo, Ontario, Canada (on leave from Purdue)
1986 Alexander von Humboldt Fellow,
Institute for Operations Research,
2007 Dow Chemical Corporation,
1998-99
Color Communications, Incorporated,
2003 Ongoing for SenSyTech,
Incorporated,