Endowed chair professor in UUCM AMC
Chief in Asan Healthcare system
Chief in Organ Transplantation Center, UUCM AMC
Chief in Liver Center, UUCM AMC
Professor in Liver Transplantation and Hepatobiliary Surgery, UUCM AMC
Associate Professor in Surgery, Korea University
Residency in Surgery, Seoul National University Hospital
Internship in Seoul National University Hospital