- Severance Intern
- Severance Radiology Resident
- Full-time instructor, Department of Radiology, Yonsei University College of Medicine (Severance)
- Assistant Professor, Department of Radiology, Yonsei University College of Medicine (Severance)
- Yonsei University College of Medicine (Severance) Professor
- Medical professor at Catholic Kwandong University International St. Mary's Hospital
- 2009-2011 President of the Korean Society of Neuro-Head and Neck Radiology
- 2010-2012 President of the Korean Society of Magnetic Resonance Medicine
- 2009-2010 President of the Korean Society of Spine Radiology
