Present Academic Appointments: Emeritus Professor of Dept. of Otorhinolaryngology-Head and Neck Surgery, Seoul National University College of Medicine,

Academic Activities: President, Korean Society of Allergy, Asthma and Clinical Immunology, 2024

Chairman (President), Board of Directors, Korean Society of ORL-HNS, 2018~2019

Board member, International Society of Inflammation and Allergy of the Nose, 2020~present

Member of Councilors, Korean Society of Allergy, Asthma and Clinical Immunology, 2011.11~present

Board member, Korea-Japan Joint Meeting, 2018~present

Member of Councilors, Asian Facial Plastic Surgery Society, 2009. 06 ~present

Congress president, Korean Society of Facial Plastic and Reconstructive Surgery, 2017.

President, Korean Society of Sleep Medicine, 2012-2013

Deputy secretary general/ Director of Rhinology, Facial Plastic and Sleep Medicine, IFOS 2013 Seoul.

Director of Planning Committee, Korean Rhinologic Society, 2002-2008