• Chrysler Corporation, Engineer, 1972-1974
• Purdue University School of Mechanical Engineering, Instructor and Researcher 1976-1978
• Hughes Aircraft Company, Missile Systems Group, Engineering Supervisor, 1978-1981
• General Motors, Advanced Military Engines Dept., Chief Project Engineer, 1981-1996
• IP boutique, Partner, Chairman of the Patent Group, 1996-2005
• Bingham Greenebaum Doll, Partner, Leader of IP Group, 2006-present