Dr. Mark E. Peterson was awarded a Doctor of Veterinary Medicine degree with High Distinction from the University of Minnesota in 1976. After moving to New York City, Dr. Peterson completed an internship and medical residency at The Animal Medical Center, the largest animal hospital in the world. He then finished a post-doctoral fellowship in both endocrinology and nuclear medicine at The New York Hospital-Cornell Medical Center. This fellowship was awarded and funded by the National Institutes of Health. In 1981, he obtained board certification as an Internal Medicine specialist from the American College of Veterinary Internal Medicine. Dr. Mark E. Peterson served as head of endocrinology and nuclear medicine at The Animal Medical Center for over 30 years. In addition, Dr. Peterson has held positions as Adjunct Professor of Medicine at the School of Veterinary Medicine at the University of Pennsylvania (1996-2000), Associate Professor of Radiology at the Weill Medical College of Cornell University (1983-2005), and Assistant Professor of Medicine at the New York State College of Veterinary Medicine, Cornell University (1982-1988). He currently serves as an adjunct Professor of Medicine at the New York State College of Veterinary Medicine, Cornell University (2015 to present). In 2021, he was awarded the American Veterinary Medical Association (AVMA) Lifetime Excellence in Research Award.