He earned his medical degree at the University of Vermont, completed his General Surgery residency at the Tufts-New England Medical Center in Boston, Massachusetts and his Thoracic Surgery residency at the University of Michigan. Dr. Underhill also was a research fellow in cardiac surgery with the National Heart, Lung and Blood Institute of the National Institutes of Health. Board certified in Surgery and Thoracic Surgery, he is a member of Connecticut Cardiothoracic Surgical Associates, a private practice for cardiothoracic and vascular surgery in Hartford, CT with offices in Waterbury, CT.