Professor Dr. Dr. (h.c.) Marilyn A. Huestis recently retired as a tenured senior investigator and Chief, Chemistry and Drug Metabolism, National Institute on Drug Abuse, National Institutes of Health, after 23 years of conducting controlled drug administration studies. Currently, she is a Senior Fellow at the Institute of Emerging Health Professions, Thomas Jefferson University, Philadelphia, PA, Science and Policy Advisor, PinneyAssociates, Senior Scientific Advisor of NMS Labs, Consultant to the US Department of Transportation, and President of Huestis & Smith Toxicology, LLC. Her research program focused on discovering mechanisms of action of cannabinoid agonists and antagonists, effects of in utero drug exposure, oral fluid testing, driving under the influence of drugs, and the neurobiology and pharmacokinetics of novel psychoactive substances. She published 505 peer-reviewed manuscripts and book chapters. Professor Huestis received a bachelor’s degree in biochemistry from Mount Holyoke College, a master’s degree in clinical chemistry from the University of New Mexico, a doctoral degree in toxicology from the University of Maryland, and a Doctor Honoris Causa from the University of Helsinki, Finland. The journal Clinical Chemistry featured her as an “Inspiring Mind”.