Mr. Peterson is a Principal at Gradient more than 20 years of experience specializing in human health risk assessment of cancer and non-cancer endpoints, critical analysis of human and animal toxicology and epidemiology studies, and multimedia assessment of exposure to chemicals. He has applied these skills primarily in the areas of product safety, occupational safety and health, and risk assessment. He has extensive experience evaluating the toxicity of asbestos and other fibers. He also has experience evaluating exposures to chemicals in a variety of different consumer products and developing toxicity guidelines for those chemicals. Many of his projects have involved preparing risk communication materials to effectively convey chemical exposure risks in appropriate context for a variety of stakeholders. He is an appointed member of the Washington Governor's Industrial Safety and Health Advisory Board, a past President of the Occupational and Public Health Specialty Section of the Society of Toxicology, and the Chairperson of the Washington Agriculture Safety Day Committee. While earning a Master of Environmental Management degree at Duke University, Mr. Peterson researched the oral bioavailability of polycyclic aromatic hydrocarbons from soil. Outside of his work at Gradient, he is an alternate member of the local Board of Health as well as a volunteer and board member of the local mountain rescue association.