The Catholic University of Korea, School of Medicine (M.D.1987)
Seoul St.Mary Hospital, Seoul, Thoracic Surgery Residency(198-92)
The Capital Army Hospital, Thoracic and Cardiovascular Surgery, Military Doctor
The Kang-Nam St.Mary Hospital, Staff Surgeon (1995- )
Seoul St. Mary Hospital, Professor of Thoracic Surgery
Loma Linda University Medical Center Research Fellow (2001-2002)
thoracic oncology