- Gangdong Sacred Heart Hospital Intern
- Resident at Samsung Seoul Hospital
- Overseas training for residents at Samsung Seoul Hospital (Kyoto University Hospital, Japan)
- Clinical Assistant Professor, Korea University Medical Center (Anam, Ansan Hospital)
- Associate Professor, Catholic Kwandong University International St. Mary's Hospital
- Regular member of the Korean Diagnostic Genetics Society
- Certification evaluation committee member of the Korean Society of Laboratory Medicine, Laboratory Credentials Committee
- Korea Institute of Genetic Testing and Evaluation Certification Evaluation Examiner
- Member of the working committee of the evaluation division of the Laboratory Medicine Foundation
- American Association of Blood Banks, International Member
