| 1975-1977 |
Epidemiologist, Center for Disease Control, Atlanta, GA |
| 1980-1985 |
Assistant Professor of Clinical Medicine, Division of Hematology-Oncology, Washington University School of Medicine, St. Louis, MO |
| 1985-1999 |
Associate Professor of Clinical Medicine, Division of Hematology-Oncology, Washington University School of Medicine, St. Louis, MO |
| 1985-1999 |
Attending Physician, Division of Hematology and Oncology, St. John's Mercy Medical Center, St. Louis, MO |
| 2000-2004 |
Associate Professor of Medicine, Division of Oncology, Washington University School of Medicine, St. Louis, MO |
| 2000-2004 |
Medical Director, Siteman Cancer Center of Washington University (West County), St. Louis, MO |
| 2004-2005 |
Medical Director, Network for Medical Communication and Research |
| 2005-present |
Director, Inpatient Oncology Service, Washington University School of Medicine, St. Louis, MO |
| 2006-present |
Associate Director, Fellowship Program, Medical Oncology |
| 1989-1997 |
Chairman, Hematology-Oncology Committee, Prudential Health Plan |
| 1992-1998 |
Consultant in Hematology-Oncology, Missouri Patient Care Foundation |
| 1993-2000 |
Consultant in Hematology-Oncology, General American Insurance Company |
| 1999-present |
Consultant in Hematology-Oncology and Member, Medical Advisory Board, Correctional Medical Systems |
| 1999-present |
President, St. Louis Society of Medical Oncology |
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AOA |
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Sigma Xi |
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Fellow, American College of Physicians |
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American Society of Internal Medicine
1988-1989 - Counselor |
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American Society of Clinical Oncology |
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American Society of Hematology |
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St. Louis Society of Medical Oncology
1984, 1999-present - President |
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Missouri Society of Medical Oncology
1993-present - Secretary |
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American Association for Cancer Education |
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European Hematology Association |