I have 18 years of experience, and specialize in the field of mechanical and structural engineering with specific knowledge in the areas of finite element, finite element method (FEM), vehicle crash, impact and collision, structural analysis, dynamics, blast and crash analysis, mechanical design, transportation safety, vibration, pipelines and fuel tanks, computer simulations and security barriers. I have published on such topics as crash analysis, transportation safety, accident investigation, crash litigations, pipelines, fuel tanks, computer simulations and security barriers. I have testified 12 times on topics such as vehicle and guardrail crash, structural analysis and transportation safety.