I have 43 years of experience, and specialize in the field of occupational medicine with specific knowledge in the areas of toxicology, pulmonary diseases and biomechanical injury. I have published on such topics as pulmonary disease or injury, toxic effects and mechanisms of injury and epidemiology of at risk groups. I have testified 60 times on topics such as pulmonary injury, systemic toxicity and cumulative trauma. I have received recognition for my participation in a federal government special panel of outside experts for analyzing the effects of occupational exposures. Our report resolved several major questions on causation and how to set standards for possible chemical carcinogens.