Joyce Tsuji is a Principal Scientist at Exponent, where she assesses health risks associated with substances in the environment, workplace, foods, consumer and personal care products, supplements, pharmaceuticals, and medical devices in the United States and internationally for industry, trade associations, the U.S. Environmental Protection Agency (EPA), state agencies, municipalities, workers, and private citizens. Her work has also included environmental exposure studies and health education and biomonitoring of populations potentially exposed to chemicals in the environment, including soil, water, and food-chain exposures. She has been a Diplomate of the American Board of Toxicology since 1992 and a Fellow of the Academy of Toxicological Sciences since 2007. She has regularly served on various scientific panels and committees, such as the National Academies Board on Environmental Studies and Toxicology, Committee on Toxicology, and many ad hoc committees, including recently a National Academies Workshop Committee to Support Development of EPA’s IRIS Toxicological Reviews. Her service also includes advisory committees for U.S. EPA, NIOSH, the U.S. Army, and the state of Washington. Elected positions with the Society of Toxicology have been the Awards Committee, Continuing Education Committee, and the presidential leadership chain for the Nanoscience and Advanced Materials Specialty Section. Dr. Tsuji completed a Ph.D. focused on environmental physiology and a post-doc on quantitative genetics of physiological traits at the University of Washington.