Pusan National University, Medical college (M.D. 1988)
Pusan National University Hospital Cardiothoracic Residency (1989-1992)
Military service as a medical officer (1993-1995)
DongA University hospital professor in dep.of cardiovascular surgery (1996-2003)
Aortic surgery
Coronary artery bypass surgery
Arterial bypass surgery
Arteriovenous shunt surgery
Vein surgery