| 2015~ | Chair, Myeloproliferative Neoplasm Guideline Panel - National Comprehensive Cancer Network (NCCN), Philadelphia |
| 2015~ | Chair, Arizona Cancer Control Coalition |
| 2012~ | Deputy Director Arizona, Mayo Clinic Cancer Center, Scottsdale, Arizona |
| 2010~ | Chair, Division of Hematology/Oncology, Department of Internal Medicine, Mayo Clinic, Scottsdale, Arizona |
| 2009~ | Professor of Medicine, Mayo Clinic College of Medicine |
| 2009~ | Consultant, Division of Hematology/Oncology, Department of Internal Medicine, Mayo Clinic, Scottsdale, Arizona |
| 2009-2012 | Director, Acute and Chronic Leukemia Program, Mayo Clinic, Scottsdale, Arizona |
| 2007-2009 | Section Head, Division of Hematology, Department of Internal Medicine, Mayo Clinic, Rochester, Minnesota |
| 2005-2009 | Associate Professor of Medicine, Mayo Clinic College of Medicine |
| 2005-2009 | Consultant, Division of Hematology, Department of Internal Medicine, Mayo Clinic, Rochester, Minnesota |
| 2004-2009 | Internal Medicine Residency Education Chair for Hematology, Department of Internal Medicine, Mayo Clinic |
| 2002-2005 | Senior Associate Consultant, Division of Hematology, Department of Internal Medicine, Mayo Clinic, Rochester, Minnesota |
| 2001-2004 | Assistant Professor of Medicine, Mayo Clinic College of Medicine |
| 2000-2001 | Instructor of Medicine, Mayo Clinic College of Medicine |