- Myongji Hospital Intern
- Severance Hospital Pathology Residency
- Clinical Assistant Professor, Department of Pathology, Hanyang University Guri Hospital
- Professor, Department of Pathology, Gangnam Severance Hospital
- President of Human Specimens Bank, International St. Mary’s Hospital, Catholic Kwandong University
- Clinical Associate Professor, International St. Mary's Hospital, Catholic Kwandong University
