Professor, Department of Orthodontics, Yonsei University, College of Dentistry
Adjunct professor, Department of Orthodontics, University of Pennsylvania between 2016 and 2019 and at Temple University between 2010 and 2011.Reviewer in AJO
DO, Angle Orthodontists and European Journal of Orthodontics
President, World Implant Orthodontics Association
Honorary president, Korean Cleft Lip and Palate Association
Vice president, Korean Association of Lingual Orthodontists
Vice president, Korean Medical 3D Printing Association
International committee, Korean Association of Orthodontists
