- Intern and resident at Yonsei University Severance Hospital
- Clinical instructor at Yonsei University Severance Hospital
- Stanford University Otology Course completed
- Visiting Professor, Facial Nerve Center, Stanford University
- Department of Otolaryngology-Head and Neck Surgery, Catholic Kwandong University International St. Mary's Hospital
- Head Professor, Department of Otolaryngology, Catholic Kwandong University
- Professor at Catholic Kwandong University International St. Mary's Hospital
- Director of Education, Korean Otological Society
- Director of Publications, Korean Society of Balance Medicine
- Secretary General of the Korean Otological Association Dizziness Research Group
- Association for Research in Otolaryngology, Associate Member
