Former Director of Otolaryngology, Osan Korean Hospital Former Director of Otorhinolaryngology, Osan Korea Hospital Former Director, Otolaryngology, Yongin Gangnam Hospital Former Director, Samsung Dream Otolaryngology , Seoul St. Marys Hospital Outpatient Professor, Seoul Regional Military Manpower Administration Senior Conscription Specialist, Korean Society of

Now Yeoksam Lee Chang-hoon Otolaryngology Clinic Director