Dr. Shepherd (Ph.D., RVT, RDMS) has been in the field of ultrasound for over 25 years. He has a Ph.D. in molecular biology and holds ARDMS registries in vascular technology, abdominal ultrasound, obstetric/ gynecological ultrasound, and neurosonography. He was a scientist at the Institute for Cancer Research in Philadelphia and an assistant professor at the University of Pennsylvania School of Medicine. He was an assistant professor at Thomas Jefferson University department of diagnostic imaging and supervisor of the ultrasound department at Frankford Hospital in Philadelphia.

Currently, he is the clinical coordinator at Health Alliance of the Hudson Valley in Kingston, NY, a guest faculty member at the Jefferson Ultrasound Research and Educational Institute and teaches registry review courses. Bill has written books about ultrasound, several research papers and chapters in ultrasound textbooks.