Mar. 2002 - Feb. 2006: Resident, Asan Medical Center, Department of Thoracic and Cardiovascular Surgery, Ulsan University College of Medicine, Seoul, Korea

May. 2009 - Feb. 2011: Clinical Fellowship, Asan Medical Center, Division of Adult cardiovascular surgery, Department of Thoracic and Cardiovascular Surgery, Ulsan University College of Medicine, Seoul. Korea

Mar. 2011 - Feb. 2013: Assistant Professor, Dongsan Medical Center, Daegu, Division of Adult cardiovascular surgery, Department of Thoracic and Cardiovascular Surgery, Kyemyung University College of Medicine, Daegu. Korea

Mar. 2013 ~: Assistant Professor, Severance cardiovascular Hospital, Division of Cardiovascular surgery, Department of Thoracic and Cardiovascular Surgery, Yonsei University College of Medicine, Seoul, Korea

Mar. 2017 ~: Associate Professor, Severance cardiovascular Hospital, Division of Cardiovascular surgery, Department of Thoracic and Cardiovascular Surgery, Yonsei University College of Medicine, Seoul, Korea

Mar. 2022~: Professor, Severance cardiovascular Hospital, Division of Cardiovascular surgery, Department of Thoracic and Cardiovascular Surgery, Yonsei University College of Medicine, Seoul, Korea

Membership
. Member of Korea society of thoracic and cardiovascular surgery
. Member of Korea society of Cardiology (KSC)
. Member of Society of Thoracic Surgeons (STS)
. Member of European association for cardio thoracic surgery (EACTS)
. Member of Asian society of thoracic and cardiovascular surgery (ASCVT)
. Member of Asian Heart Rhythm Society (AHRS)
. Academic faculty of KHRS (Korea Heart Rhythm Society)
. Member of Heart valve society (HVS)
. Member of International society of lung and heart transplantation (ISLHT)
. International Master proctor of Perceval sutureless valve system