Samsung medical center, Seoul, Korea

Professor. Division of Hematology-Oncology, Dept.of Medicine, Samsung Medical Center, Sungkyunkwan University ,  School of Medicine Seoul

Director , Division  of hematology-Oncology Dept.of Medicine, Samsung Medical Center, Sungkyunkwan University ,  School of Medicine Seoul

CAR-T cell therapy center. Samsung medical center, Seoul, Korea

Leader of lymphoma service in Samsung medical center

Chairman of lymphoma working party of Korean society of hematology

Chairman of Consortium of improving survival of lymphoma ( CISL)

Founding member of Asian lymphoma study group ( ALSG)

Co-Chair of T cell lymphoma forum (TCLF)