Research director, Silent Spring Institute Ruthann Rudel is the research director at Silent Spring Institute, where she leads major exposure and toxicology research programs focusing on hormonally active chemicals and biological mechanisms by which chemicals may influence breast cancer. Her innovations in “breast cancer toxicology” include major peer-reviewed articles that identify chemicals that cause breast tumors or alter breast development in animal models, and she is developing a database of methods for measuring these chemicals in women. Rudel leads a program to develop breast cancer-relevant chemical safety tests for green chemistry. She also directs the Institute’s Household Exposure Study, which has been described as the “most comprehensive analysis to date” of exposures in homes and is widely cited. She has served on the U.S. National Toxicology Program Board of Scientific Counselors and is an adjunct Research Associate in the Brown University School of Medicine.