Seoul National University, Medical College (M.D.1980)
Seoul National Unverdity Hospital(SNUH) Cardiothoracic Residency(1980-1985)
Korean Army Hospital as Captain(1985-1988)
SNUH cardiac Fellowship(1988-1989)
Inha University Hospital Assistant Professor(1989-1991)
Chungbuk University Assoc. prof.(1991-1996)
Oklahoma Health Science Center Cariac fellowship(1992-1993)
WHO fellowship at NSW univ. in Sydney(1995)
Ewha University Medical school Professor(1996- )
cardic valve surgery
lung cancer surgery
general pulmonary surgery