Former Vice-President, Busan Medical Association, Former Chairman, Busan Medical Association Volunteer Committee Former Vice-Chairman of the Grievance Handling Committee of the Busan Metropolitan City Medical Association Former HR Member of the Busan Metropolitan City Medical Association Former Dispatch Director of the Korean Medical Association Former Medical Policy Member of the Korean Medical Association Former President of the Busan LASIK Research Association Former Executive Director of the Busan Ophthalmological

Now The Cham Eye Clinic Director