I have 26 years of experience, and specialize in the field of mechanical and biomechanical engineering with specific knowledge in the areas of kinematics and biomechanics, accident reconstruction and dynamics and engineering design. I have published on such topics as rear end collisions and whiplash injury, pedestrian accidents and injuries, and dynamics of collisions. I have testified 20 times on topics such as accident dynamics and kinematics, accident reconstruction, and biomechanical engineering.