The Society of Toxicology (SOT) has learned of the passing of George Alexeeff, PhD, DABT, on Monday, June 29, 2015. Dr. Alexeeff joined SOT in 1981 and was the President of the Northern California Regional Chapter of the Society as well as a member of the Comparative and Veterinary, Inhalation and Respiratory, Reproductive and Developmental Toxicology, and Risk Assessment Specialty Sections. He also was a recipient of the Risk Assessment Specialty Section Best Overall Abstract Award in 2006. At the time of his passing, he was the Director of the California Environmental Protection Agency's Office of Environmental Health Hazard Assessment (OHEEA). Additional information about his distinguished career is posted on the OHEEA website.