I have 29 years of experience and specialize in the field of biomedical and mechanical engineering with specific knowledge in the areas of medical and rehabilitative equipment, ADA, and personal injuries and disabilities. I have published on such topics as pressure sores, their occurrence, and prevention, wheelchair seating, and mobility and engineering design. I have testified 25 times on topics such as engineering design and equipment failure, injuries suffered by individuals with disabilities, and biomechanics.