Dr. Helmut Sterz, a veteran toxicologist and member of Physicians and Scientists for Health, Freedom and Democracy (MWGFD), began his scientific career after completing a degree in veterinary medicine and obtaining a doctorate in virology. Over the course of his career as a toxicologist in the pharmaceutical industry, he published numerous scientific articles. From 1974 to 1988, Sterz headed the Department of Reproductive Toxicology at Boehringer Mannheim, improving techniques for assessing toxicity in pregnant laboratory animals and their offspring. Since 1981, he has been a certified specialist veterinarian in pharmacology and toxicology. From 1988 to 1995, he headed the Toxicology Center of Servier in Orléans, France, where he introduced alternative animal models to better assess the risk of side effects of new molecules in humans. From 1995 to 2001, he led the Toxicology Center in Basel, Switzerland, and ultimately the entire preclinical toxicology division of F. Hoffmann-La Roche. In 2001, Pfizer appointed him head of its two European toxicology centers in Amboise, France, and Sandwich, England, where he worked until retirement.