| Assistant Faculty Member, Division of Basic Sciences, Department of Pediatrics, National Jewish Center Medical and Research Center, Denver, Colorado |
1992-1999 |
| Assistant Professor (Non-Tenure Track), Department of Pediatrics (Division of Hematology/Oncology), Department of Immunology, University of Colorado, School of Medicine, Denver, Colorado |
1994-1999 |
| Assistant Professor (Tenure Track), Department of Pathology, Immunology and Laboratory Medicine, University of Florida College of Medicine, Gainesville, Florida |
2000-2001 |
| Associate Professor (Tenured), Department of Pathology, Immunology and Laboratory Medicine, University of Florida College of Medicine, Gainesville, Florida |
2001-2010 |
| Professor, Department of Pathology, Immunology and Laboratory Medicine, University of Florida College of Medicine, Gainesville, Florida |
2010-present |
| Visiting Professor, Institute for Integrated Cell-Material Sciences (iCeMS), Kyoto University |
2010-present |
