Kristen Willis, Ph.D., is the deputy director of the Antimicrobials Division in the Office of Pesticide Programs. She joined the EPA in 2016 as a senior scientist and was most recently the chief of the Efficacy Branch. Prior to EPA, Kristen served as a research microbiologist with Defense Threat Reduction Agency. Kristen received her B.S. in microbiology from Cornell University in 2003 and her Ph.D. in microbiology from the University of Illinois Urbana-Champaign in 2010.