- Severance Hospital Intern
- Gangnam Severance Hospital resident
- Clinical instructor at Gangnam Severance Hospital
- Gangnam Severance Hospital Jeon, Assistant, Associate, Professor
- Vice-Director of Catholic Kwandong University International St. Mary's Hospital
- Department of Neurosurgery, Catholic Kwandong University International St. Mary's Hospital
- Director, Spine Center, International St. Mary's Hospital, Catholic Kwandong University
- Professor at Catholic Kwandong University International St. Mary's Hospital
