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WAHO Board of Directors


Ruth M. O’Regan, MD
Associate Director, Clinical Research
University of Wisconsin Carbone Cancer Center

Ruth M. O’Regan, MD, is the associate director for clinical research at the University of Wisconsin School of Medicine and Public Health. She has recently been named chief scientific officer of the Big Ten Cancer Research Consortium, where she will guide the consortium's research and scientific mission.

Dr. O'Regan's research focuses on identifying mechanisms of resistance to breast-cancer therapies and the development of new therapies with a specific focus on triple negative breast cancer. She has led several trials focused on new therapeutic approaches for breast cancers resistant to standard therapies.

She earned her medical degree from University College Dublin,  and completed her internal medicine residency at the Medical College of Wisconsin and her hematology/oncology fellowship at Northwestern University.


Benjamin Parsons_WAHO
Benjamin M. Parsons, DO
Medical Oncologist/Hematologist
Gundersen Health System, La Crosse Hospital


Ron Kirschling_WAHO
Ron J. Kirschling, MD
Medical Director
Aspirus U.W. Cancer Center


Daniel Mulkerin_WAHO
Daniel Mulkerin, MD
Regional Director
University of Wisconsin Carbone Cancer Center

Daniel Mulkerin, MD, graduated from Jefferson Medical College. He then completed his residency in internal medicine and fellowship in medical oncology at the University of Wisconsin Hospital and Clinics. Dr. Mulkerin joined the UW Medical School faculty in 1999 and is currently an assistant professor in the department of medicine, section of medical oncology. His clinical expertise is in the treatment of gastrointestinal malignancies, including liver and pancreas, esophageal, stomach, biliary, colon, rectal, and anal cancers. He is actively involved in the development of new therapies for patients with these diseases. Dr. Mulkerin also serves as regional director of the University of Wisconsin Carbone Cancer Center regional cancer center network, which includes affiliate sites in eight communities within Wisconsin and Illinois.

Immediate Past President

Kurt Oettel_WAHO
Kurt R. Oettel, MD
Medical Oncologist
Gundersen Health System, La Crosse Hospital


Christopher Chitambar
Christopher Chitambar, MD, FACP
Associate Professor of Medicine
Froedtert and the Medical College of Wisconsin, Cancer Center
Thomas Giever, DO, MBA
Assistant Professor, Medicine
Froedtert and the Medical College of Wisconsin
Dean Gruber_WAHO
Dean Gruber, RPh
Vice President of Industry Relations
altScripts Specialty Pharmacy
Christopher Hake_WAHO
Christopher R. Hake, MD
Medical Oncologist/Hematologist
Waukesha Memorial Hospital
William G. Matthaeus, MD
Aurora Advanced Healthcare
Dhimant R. Patel, MD
System Medical Director
Aurora Cancer Care
Gil A. Rodrigues, MD
Medical Oncologist/Hematologist
Aurora Advanced Healthcare
Federico Sanchez_WAHO
Federico A. Sanchez, MD
System Medical Director, Medical Oncology
Aurora Advanced Healthcare

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