- Kineticorp, LLC, Senior Engineer, Vehicle Handling and Stability, 2007-Present
- Colorado State University, Founder and Director, Race Vehicle Dynamics Laboratory, Motorsport Engineering Research Center, 2002-Present
- Colorado State University, Co-Founder of the Motorsport Engineering Research Center (MERC), 2002
- Colorado State University, George T. Abell Professor of Computer Assisted Engineering, 1995-1998
- Colorado State University, Director, Center for Computer Assisted Engineering, 1994-1998
- University of Leeds, Leeds, England, Visiting Senior Research Fellow, Department of Mechanical Engineering, 1992-1993
In addition to the experience listed above, Dr. Fitzhorn has acted as a consultant for over 20 companies, including Caterham,
US Army Engineering WES, B.F. Goodrich, The Gates Rubber Company, and ABB Robotics. He has been a consultant in
vehicle dynamics for a variety of race suppliers, race teams and constructors.