- Wonju Christian Hospital Clinical Instructor
- Konyang University Hospital Jeon Kang, Cho, Associate Professor
- Incheon St. Mary's Hospital specialist
- Medical Director, Catholic Kwandong University International St. Mary's Hospital
- Department of Anesthesiology and Pain Medicine, Catholic Kwandong University International St. Mary's Hospital
- Director of Medical Library, Catholic Kwandong University International St. Mary's Hospital
- Director of surgery at Catholic Kwandong University International St. Mary's Hospital
- Professor at Catholic Kwandong University International St. Mary's Hospital
