Most recently, Dr. Sibley was an Assistant Professor of Radiation Oncology at Duke University Medical Center. During his four years on faculty at Duke, he distinguished himself with research and publications in three-dimensional treatment planning and intrathoracic malignancies. His particular interest is in using the advances in technology to minimize radiation effects to normal tissues, while improving tumor targeting. He also has extensive experience in combined modality approaches to head and neck cancer, lung cancer, and gastrointestinal malignancies.

Dr. Sibley received his M.D. degree in 1990 from the University of Michigan. His transitional internship at St. Joseph Mercy Hosipital in Ann Arbor was followed by a residency in Radiation and Cellular Oncology at the University of Chicago. He was awarded a fellowship from the American Society for Therapeutic Radiology and Oncology in 1995 for research in virally delivered gene therapy. He is board certified by the American Board of Radiology in Radiation Oncology.