Trevor M. Penning, PhD, is the Thelma Brown and Henry Charles Molinoff Professor of Pharmacology, Professor of Biochemistry and Biophysics and OB/GYN, and Founding Director of the Center of Excellence in Environmental Toxicology (CEET) at the University of Pennsylvania (UPenn), Perelman School of Medicine. Dr. Penning obtained his PhD in Biochemistry with Professor M. Akhtar F.R.S. at Southampton University, UK. He conducted postdoctoral training with Professor Paul Talalay (deceased), member of the National Academy of Sciences at Johns Hopkins University School of Medicine. He joined the faculty at UPenn in 1982. He is internationally recognized for his research on steroid hormone enzymology and how hormones and environmental chemicals cause cancer. He has published over 320 peer-reviewed articles which have been cited more than 30,989 times with a h-index of 89. He is a member of The Johns Hopkins Society of Scholars, he is a Fellow of the American Chemical Society, and recipient of the Founders Award Division of Chemical Toxicology, American Chemical Society. He has been advisor to the WHO, International Agency for Research on Cancer. He is Editor-in-Chief Steroids, he has been a Senior Editor for Cancer Research, and is on the Editorial Boards of J Steroid Biochemistry and Molecular Biology, and Molecular and Cellular Endocrinology.  He is a member of the expert panel Research Institute for Fragrance Materials.