Associate Professor of Department of Dermatology, Seoul National University Bundang Hospital in Korea.Secretary General Deputy, International Society for Dermatologic Surgery 2015.Treasurer of the Korean Dermatologic Laser Association (2006 – present)Treasurer of the Korean Society of Cosmetic Dermatology (2012 – present)Scientific Director of the Korean Society for Dermatologic Surgery (2012 - present) Treasurer of Korean Hair Research Society (2016 – present)International Mentor of American Society for Dermatologic Surgery (2011 – present)International Society for Dermatologic Surgery preceptor (2014 – present)