Dr. Margaret (Peg) Riley, Ph.D., is a Professor in the Department of Biology at the University of Massachusetts Amherst. She received her Ph.D. at Harvard University in 1991 and joined the faculty at Yale University, where she was granted tenure and remained for 15 years while developing an internationally renowned research program in antimicrobial drug discovery. She has published over 100 articles and edited four books in her research area. She is a well-known authority in the field of ‘bacteriocins’. Her early studies in microbial ecology and the evolution of antibiotic resistance suggested an alternative to the current paradigm of antibiotic drug discovery, one that recognizes the power of targeted approaches to therapeutic intervention, which result in lower levels of antibiotic resistance and reduced collateral damage to the healthy human microbiome.