Dr. Gregoric earned his medical degree from the University of Ljubljana in 1979. After several years of training and practice in his native Slovenia, Dr. Gregoric completed a fellowship in Cardiovascular and Thoracic Surgery at the Texas Heart Institute (1984-1992), a residency in General Surgery at the University of Texas-Houston Health Science Center Medical School (1992-1996), and a residency in Cardiovascular and Thoracic Surgery at the Texas Heart Institute (1996-1998). In both 1988-1989 and 1990-1991 he was honored with an Ethicon Inc. Vascular Fellowship. Dr. Gregoric is currently Associate Chief of Cardiopulmonary Transplantation as well as Director, Mechanical Circulatory Support at St. Luke's Episcopal Hospital, Houston, Texas He also holds an appointment as Clinical Assistant Professor of Surgery, Department of Cardiothoracic and Vascular Surgery, University of Texas-Houston Health Science Center Medical School.

Dr. Gregoric has conducted research in the areas of capillary microscopy clinical investigations and hypothermic spinal cord protection. A few of his areas of interest include
Jarvik assist devices (LVAD), robotics in cardiac surgery, and the total artificial heart.