Gillespie graduated from Lake Erie College of Osteopathic Medicine in Erie, Pennsylvania. He then completed an internship in internal medicine, a residency in anesthesiology and fellowship training in adult cardiothoracic anesthesiology and critical care medicine, all at the Mayo Clinic in Rochester, Minnesota.
He is board certified in anesthesiology and critical care medicine by the American Board of Anesthesiology.
Gillespie practices at Aurora BayCare Medical Center at 2845 Greenbrier Road and Aurora BayCare Health Center at 2253 W. Mason St., both in Green Bay, and at Aurora BayCare Health Center in Kaukauna. He joins an experienced, highly skilled team of more than a dozen anesthesiologists.