R. Matthew Brach, PhD, PE is a Senior Managing Consultant with Engineering Systems Inc. of Aurora, Illinois specializing in automotive crash reconstruction. He earned his PhD in Mechanical Engineering from Michigan State University, an MS in Mechanical Engineering from the University of Illinois at Chicago, and a BS in Electrical Engineering from the University of Notre Dame. He is a member of the Society of Automotive Engineers (SAE), the American Society of Mechanical Engineers and the Institute of Electrical and Electronics Engineers. He is the author of numerous technical papers covering topics that include nonlinear vibrations, automotive engine mount design and automotive accident reconstruction and is coauthor of the textbook Vehicle Accident Analysis and Reconstruction Methods, published by SAE.