2018 - present | Chief, Division of Oncology & Hematology, Department of Internal Medicine, Guro Hospital, Korea University College of Medicine, Korea |
2015 – present | Chairman, MPN Working Party of the Korean Society of Hematology |
2009 - present | Professor, Division of Oncology & Hematology, Department of Internal Medicine, Guro Hospital, Korea University College of Medicine, Korea |
2006 - 2008 | Visiting Fellow, National Cancer Institute/NIH |
1991 - 1995 | Residency in Internal Medicine, Korea University Hospital, Korea |