- Inje University Sanggye Paik Hospital Intern
- Resident at Inje University Seoul Paik Hospital
- Clinical instructor, Department of Radiology, Sinchon Severance Hospital
- Radiology specialist at Korea Central Veterans Hospital
- Medical professor at Catholic Kwandong University International St. Mary's Hospital
- 2013~2016 Marquis Who's Who in the World, one of the world's top three biographical dictionaries
