His forty years of M&S experience in helicopters, missiles, aircraft and hypersonic vehicles was acquired at the German Helicopter Institute, the U.S. Army and U.S. Air Force and his consulting business Modeling and Simulation Technologies. Having given short courses on M&S in the U.K., Germany, France and the U.S. he is an internationally recognized lecturer. Recently he authored the textbook Modeling and Simulation of Aerospace Vehicle Dynamics, published by the American Institute for Aeronautics and Astronautics.