Professional Experience and education
1983 - 1984 Internship, Seoul National University, Dental Hospital
1984 - 1986 Residency, Seoul National University, Dental Hospital, Department of Orthodontics
1986 Master of Dental Surgery. Seoul National University, Graduate School
1993 PhD, Seoul National University, Graduate School
May 1990 - Mar. 1994 Fellow Doctor, Department of Orthodontics, Seoul National University Dental Hospital
Mar. 1994 - Mar. 1996 Full-time Lecturer, Department of Orthodontics, College of Dentistry, Seoul National University
April 1996 - Mar 2001 Assistant Professor, Department of Orthodontics, College of Dentistry, Seoul National University
April 2001 - Mar 2004 Associate Professor, Department of Orthodontics, College of Dentistry, Seoul National University
Dec. 1995 - Dec. 1997, Jul. - Sep. 2011
Visiting Professor, Department of Orthodontics, School of Dentistry, University of Washington
Aug. - Oct. 2007 Visiting professor, Department of Orthodontics, University of California, Los Angeles
April 1994 - Dec. 1995, April 1998 - Mar. 2002
Editor-in-Chief, Korean Journal of Orthodontists
April 2014 - Mar. 2016 President, Korean Association of Orthodontists

Honors and Awards
Oct. 2017 Kwan Song Award, Korean Association of Orthodontists
Sept. 20-21, 2018 Kokich-Saphiro lecture, University of Washington

Research Interests
TMD, open bite, mini-implants and long-term stability