· Yonsei University College of Medicine, Korea, Mar. 1996 – Feb. 2002
·Gangnam Severance Hospital, Korea, Mar. 2002 – Feb. 2003
· Obstetrics & Gynecology, Samsung Medical Center, Korea, Mar. 2003 – Feb. 2007
·Clinical Fellowship in Reproductive Endocrinology, Ajou University Hospital, Korea, Mar.2010 – Feb. 2011
· Korean Medical Licence, Feb.2002
· Korean Board of Obstetrics & Gynecology, Feb. 2007
· Medical Director, MiraewaHeemang Women’s Clinic, Korea, Mar. 2011 – Jul. 2013
· Medical Director, ZN Women’s Clinic, Aug. 2013 – Aug.2015
· Outside Professor, Samsung Medical Center, SungKyunKwan University College of Medicine, Mar. 2011 ~
· Present, outside professor of Samsung Seoul Hospital
· Present, Chief Director of CHOISANG Women’s Clinic
· Present, Director of Center in CHOISANG Women’s Clinic Haifu. Subfertility
· Present, Director of Center in CHOISANG Women’s Clinic