Dr. Shepherd is the Chief Scientific Officer and Professor of Population Sciences at the University of Hawaii Cancer Center, He is the B.H. and Alice C. Beams Endowed Professor in Cancer Research at the John A Burns School of Medicine, a Fulbright Scholar, a Fellow of the American Institute for Medical and Biological Engineering (AIMBE), a Fellow of the American Association of Physicists in Medicine (AAPM), and a former President of the International Society for Clinical Densitometry. He received his PhD from the University of Virginia and completed a Postdoctoral Fellowship in Biophysics at Princeton University. He was a faculty member in the UCSF Radiology for 19 years studying a wide variety of imaging biomarkers for breast cancer using advanced machine learning techniques. He also hosts the biennial International Breast Density and Risk Assessment Workshop and has been continuously funded from the NIH since 2005, led 6 R01-funded studies, published over 350 peer-review publications that have been referenced over 24,000 times.