Philip E. Castle, PhD, MPH is the Director of the Division of Cancer Prevention (DCP), Acting Director of the Cancer Prevention Fellowship Program, and a Senior, Tenured Investigator in the Division of Cancer Epidemiology and Genetics (DCEG) at the U.S. National Cancer Institute (NCI) (Rockville, MD, USA). Previously, he was a Tenured Professor in the Department of Epidemiology and Population Health at Albert Einstein College of Medicine (Bronx, NY, USA) (2014-20), Chief Scientific Officer of the American Society for Clinical Pathology (ASCP) (2011-2), and Senior, Tenured Investigator (2010) and Tenure-Track Investigator (2003-10) in DCEG/NCI. Dr. Castle was a Cancer Prevention Fellow in DCP/NCI (1999-2002). Dr. Castle received a Ph.D. in Biophysics (1995) and M.P.H. in Epidemiology (2000) from the Johns Hopkins University (Baltimore, MD, USA) and a B.S. in Biological Sciences from Carnegie-Mellon University (1986).