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Medical Oncologists

Steven Powell, MD

Steven Powell, MD

Dr. Powell is a medical oncologist and clinician scientist at Sanford Health. He is also an assistant professor in internal medicine at the University of South Dakota Sanford School Of Medicine. He serves as a sub-investigator for Sanford Health’s National Cancer Institute Community Oncology Research Program (NCORP). In addition to this, he serves as a principal investigator for several industry-sponsored and investigator-initiated studies. Dr. Powell was recently invited to serve as a clinician scholar for the Association of Community Cancer Center (ACCC) Institute for Clinical Immuno-Oncology (ICLIO). He is also a member of the National Cancer Institute’s Head and Neck Cancer steering committee.  

Dr. Powell’s research is predominantly focused on experimental cancer therapeutics, both in the lab and in the clinic. Much of this work is focused on cancer immunotherapies. Additionally, he is an active investigator in genomics and personalized therapies. His treatment focus is primarily on head and neck cancers. He is engaged in clinical trials focused on new therapies to not only increase efficacy, but to also reduce side effects.  

Dr. Powell received his undergraduate degree in biomedical engineering at Arizona State University and his medical degree at the University of South Dakota Sanford School of Medicine. He completed his internal medicine residency, chief residency, and hematology and oncology fellowship training at the University of Minnesota.  

In his spare time, he is a practicing zymurgist, foodie, home cook, vegetable gardener and outdoor enthusiast. Dr. Powell is married with three children.

Jonathan Bleeker, MD

Dr. Bleeker is a medical oncologist and hematologist and aims to provide comprehensive cancer care for the whole person. Dr. Bleeker attended medical school at the University of Iowa and completed his residency and internship at University of Virginia Health System. He was fellowship trained at Mayo Clinic in Rochester, Minn., and is board certified with the American Board of Internal Medicine: Medical Oncology, and the American Board of Internal Medicine: Hematology. Dr. Bleeker is married with three children. He enjoys golf, reading and watersports.