- Internal medicine resident at Yonsei University Severance Hospital
- Assistant Professor, Clinical Research, Department of Oncology, Yonsei University Severance Hospital
- Professor, Department of Hematology and Oncology, Seoul National University Bundang Hospital
- Director of Oncology and Hematology Department, International St. Mary's Hospital, Catholic Kwandong University
- Professor at Catholic Kwandong University International St. Mary's Hospital
- Certified physician in biomedical informatics
- Member of Korean Anticancer Therapy Research Association
- Member of the Korean Society of Medical Oncology
- Member of Korean Cancer Society
- Member of the Korean Society of Internal Medicine
