Dr. Sonnenday received his medical degree from Vanderbilt University in 1997, and went on to complete his General Surgery residency at the Johns Hopkins University in June of 2005. While a research fellow in transplantation from 2000 to 2003, he completed a Masters of Health Sciences in Clinical Investigation at the Bloomberg School of Public Health in 2003. After completion of his residency, Dr. Sonnenday continued on at Johns Hopkins as a Fellow in Surgical Oncology and Instructor of Surgery until 2006, and he completed a fellowship in abdominal transplant surgery at the University of Michigan in 2008.