Dr. Mulholland completed his undergraduate degree at Mississippi State University. He also did graduate studies at Mississippi State before earning his medical degree at the University of Mississippi School of Medicine. He then completed both his residency in internal medicine and his fellowship in cardiology at the University of Mississippi School of Medicine. He then finished special studies in Clinical Electrophysiology at the University of Alabama in Birmingham.
He has served as Assistant Professor of Medicine at the University of Mississippi Medical Center and as the Director of their Cardiac Electrophysiology Laboratory.