Medical Certification
Feb 1988Licensure in Medicine (License No. 36692)Mar 1992Diplomate, Korean Board of Internal Medicine (No.3600)Jan 1995License for Using Radioisotope (No.533)

Clinical Training
Mar 1988 – Feb 1989Intern, Severance Hospital, Yonsei University College of Medicine
Mar 1989 – Feb 1992Resident in Internal Medicine, Severance Hospital, Yonsei University College of Medicine
Feb 1992 – Apr 1995Medical Officer in Korean Army (Captain)
May 1995 – Aug 1996Fellow in Gastroenterology, Severance Hospital, Yonsei University
College of Medicine  

Appointments
Sep 1996 – Mar 1999 Instructor, Division of Gastroenterology,
Department of Internal Medicine, Inha University Hospital
Apr 1999 – Jul 2003Assistant Professor, Division of Gastroenterology,
Department of Internal Medicine, Inha University Hospital
Aug 2003 – Feb 2005Research Associate, Department of Pharmaceutics & Pharmaceutical Chemistry, University of Utah
Mar 2005 – PresentProfessor, Division of Gastroenterology,
Department of Internal Medicine, Inha University Hospital
Aug 2006 - Feb 2008Director, Clinical research center of Inha University HospitalApr 2009 - PresentCEO, Utah-Inha DDS & Advanced Therapeutics Research CenterMay 2010 - PresentDirector, National center for efficacy evaluation of health product targeting digestive disease (NCEED)