- Seoul Asan Medical Center Intern
- Catholic Central Medical Center Internal Medicine Resident
- Clinical instructor, Department of Endocrinology, St. Vincent's Hospital
- Assistant Professor, Department of Hematology, Inje University Hospital
- Associate Professor, Catholic Kwandong University International St. Mary's Hospital
- Member of the Korean Society of Medical Oncology
- Member of Korean Anticancer Therapy Research Society
- Member of the Korean Society of Hematopoietic Stem Cell Transplantation
- Member of the Korean Society of Hematology
- Member of Korean Medical Association
- Member of the Korean Society of Internal Medicine
