The professional career of Professor Engin spans last three decades. After obtaining a Ph.D. in 1968 from the University of Michigan, Dr. Engin continued his research on head injury modeling at the Highway Safety Research Institute of the same university. His pioneering work in the area of head injury modeling has been internationally recognized as the first major contribution to the world’s literature since the initial rigid shell models of two European scientists in 1943 and 1950. Dr. Engin’s elastic shell-fluid transient response model formed the cornerstone of the cavitation contre-coup hypothesis for head injury. In 1985, for his research on head injury, Dr. Engin received the highest award of the American Society of Biomechanics, namely, the BORELLI Award. During his tenure (1971-1995) at The Ohio State University, Dr. Engin made major contributions on the Biomechanics of major articulating joints of the human body from both experimental and mathematical modeling points of view. Dr. Engin has over 200 publications on various topics in mechanics and biomechanics, and he serves as the U. S. Editor-in-Chief of Technology and Health Care journal.