SOT has learned that John A. Thomas, PhD, passed away on November 15, 2025. Dr. Thomas was a professor of pharmacology and toxicology and a medical educator. He graduated from the University of Wisconsin–La Crosse and the University of Iowa. He was a prolific author and published over 500 articles, monographs and textbooks. He served on many governmental committees or panels for the US Food and Drug Administration, US Environmental Protection Agency, National Institute of Environmental Health Services, the National Toxicology Program, and the National Library of Medicine. He served as chairperson for the Gordon Conference (Mechanisms in Toxicology) and was on editorial boards for several journals. He was an elected foreign member of the Russian Academy of Medical Sciences. Dr. Thomas was a 50-year member of SOT and served in many capacities, including on the SOT Council and as Regional Chapters’ President. He was the recipient of several SOT awards, including the Merit Award (1998) and the Founder’s Award (2014).
This blog serves as an announcement of the member’s passing. Family, friends, and colleagues are welcome to develop a more detailed tribute for publication by SOT.