Jack D. Mattingly has 50 years' experience in aircraft propulsion. After serving most of his military career teaching at the U.S. Air Force Academy and the Air Force Institute of Technology, he retired from active duty in 1989 and joined the faculty of Seattle University, retiring in 2000 as professor emeritus in Mechanical Engineering (M.E.). He has since focused on teaching short courses with Practical Aeronautics, Inc. to practicing engineers, consulting, and writing textbooks. He is a co-author of Aircraft Engine Design and Elements of Propulsion: Gas Turbines and Rockets, both winners of the AIAA Summerfield Book Award. He holds a Ph.D. in Aeronautics and Astronautics from the University of Washington.