1999–pres.: Professor, University of Kentucky, Lexington, KY
1990–1999: Associate Professor, University of Kentucky, Lexington, KY
1983–1990: Adjunct Assistant Professor, University of California, Los Angeles, CA
1980–1983: Visiting Lecturer, University of California, Los Angeles, CA
1980–1987: Member of the Technical Staff, The Aerospace Corporation, El Segundo, CA
1977–1980: Graduate Research Assistant, University of California, Los Angeles, CA
1973–1976: Staff Mathematician, Prose, Inc., Los Angeles, CA
1968–1972: Engineer/Scientist, McDonnell Douglas Astronautics Co., Santa Monica, CA
PhD Engineering, University of California, Los Angeles (1980)
MA Applied Mathematics, University of California, Los Angeles (1975)
BS Aeronautical-Astronautical Engineering, Ohio State University (1968)