Dr. Grisell earned his medical degree from the Texas College of Osteopathic Medicine at the University of North Texas Health Science Center. He completed his internal medicine internship and residency at Brooke Army Medical Center in Fort Sam Houston, Texas and his radiation oncology residency at the National Cancer Institute, Radiation Oncology Branch in Bethesda, Maryland.

After practicing at Fitzsimons Army Medical Center in Aurora, Colorado, Dr. Grisell moved to Melbourne, Florida, where he spent the major part of his career with Florida Oncology at Holmes Regional Medical Center and served as Medical Director. Before joining Cancer Centers of the Carolinas in 2009, Dr. Grisell was Associate Professor of Radiation Oncology at the University of Cincinnati’s Barrett Cancer Center.

Dr. Grisell is Board Certified in Internal Medicine and Radiation Oncology.