I have 24 years of experience, and specialize in the field of toxicology and carcinogenesis with specific knowledge in the areas of nickel, chromium and polycyclic hydrocarbons. I have published on such topics as nickel-induced cell transformation, chromium-induced cell transformation and cell transformation induced by PAH. I have testified 15 times on topics such as benzene, TCE and chromium compounds. I have a broad range of expertise in chemical toxicology and chemical carcinogenesis. I am skilled in genetic toxicology, mutagenesis, cell transformation, chemical carcinogenesis, and the molecular biology of chemically induced cell transformation.