Trevor M. Penning, Ph.D., is the Thelma Brown and Henry Charles Molinoff Professor in the University of Pennsylvania, Perelman School of Medicine, Departments of Systems Pharmacology & Translational Therapeutics, Obstetrics & Gynecology, and Biochemistry & Biophysics. He is also the director of the Center of Excellence in Environmental Toxicology, an Environmental Health Sciences Core Center funded by NIEHS, and is deputy director of the Penn Superfund Research and Training Program Center. He is internationally recognized for his research on the role of human aldo-keto reductases (AKRs) in hormonal and chemical carcinogenesis. He is one of the most cited authors in the literature on polycyclic aromatic hydrocarbons (PAH), where his team discovered a novel pathway of PAH activation in human lung, which involves the formation of electrophilic and redox-active o-quinones. He has been a member of the IARC working groups which classified benzo[a]pyrene and diesel exhaust as Group 1 “known human carcinogens”. His current research is on the toxicological properties of petrogenic PAH that were released from the Deep-Water Horizon Oil Spill and the role of AKRs in the metabolic activation of nitroarenes. He is a fellow of the American Chemical Society. Dr. Penning has a Ph.D. in Biochemistry from Southampton University, United Kingdom.