Yang-Sun CHO Korea (Republic of)
2016.10. - 2018.12. President. Korean Otological Society
2019.12. - 2021.12 President. Korean Facial Nerve Society
2020. 01. - 2021.12. Chairman. Board of Directors, Korean Society of Otorhinolaryngology-Head and Neck Surgery
2022. 04. President. The 14th International Facial Nerve Symposium
2022. 11- 2023.11. President. Korean Skull Base Society
2027.05. President-elect, The 10th Quadrennial Conference on Vestibular Schwannoma and Other CPA Tumors (VS 2027)
International member, American Academy of Otolaryngology -Head and Neck Surgery
2017. 08- Member, Board of Director, Sir Charles Bell Society (SCBS)
2023. 01- Member, IFOS Executive Committee