Seoul National University Medical School(M.D. 1986)
Intership in Seoul National University Hospital(1986-1987)
Military Service as a general practitioner(1987-!990)
Residency in Seoul National University Hospital(1990-1994)
Staff surgeon at the department of thoracic and vascular surgery , Sejong General Hospital(1994-1999
Reserach fellow , Tissue Engineering , Harvard Medical School(1997-1998)
Director, Sanggye Paik Hospital, Inje University(1999- 2004)
Associate Professor, University of Ulsan, College of Medicine(2004, 5 - )
Cardiac Surgeon, Asan Medical Center(2004, 5 - )