Seoul National University Medical School(M.D. 1971)
Seoul National University Hospital Residency(1971-1976)
SNUH Cardiothoracic Residency (1972-1976)
Army Surgeon Service (1976-1979)
Lecturer, Korea University(1979-1980)
Professor, Seoul National University Medical School (1992- )
Research Fellow, Mass General Hospital (1984-1985)
Chairman, Board of Directors of the Korean Society for Thoracic & Cardiovascular Surgery (2001-2003)
President, Korean Society for Thoracic and Cardiovascular Surgery (2005-2006)
President, The Association of Thoracic and Cardiovascular Surgeons of Asia (2009-2010)
Professor Emeritus,Seoul National University(2012-to date)
Golf
Esophageal Surgery
Pulmonary Surgery
Director, Center for Thoracic Cancers DIRAMS