Dr. Cmelak is the Medical Director for the Department of Radiation Oncology at the Vanderbilt Ingram Cancer Centers at Franklin, The Gateway-Vanderbilt Cancer Center in Clarksville Tennessee, and the Vanderbilt-Maury Cancer Center in Spring Hill Tennessee. He trained at both Northwestern University and Stanford University. He is a recognized leader in cancer treatments utilizing radiation therapy with novel chemotherapy agents in head and neck cancers, human papillomavirus, and provides comprehensive radiation treatment for patients with head and neck cancers and brain tumors, using the latest technologies including stereotactic radiosurgery and stereotactic body radiotherapy. Dr. Cmelak has been the Clinical Track Team Leader for Head and Neck Cancers for ASCO in 2014 and 2015, and on the Scientific Review Committee for the past 3 years. He is a member of the Head and Neck Core Committee for the ECOG-ACRIN and a Head and Neck Committee member on the NCCN. He is the Principal Investigator in Head and Neck carcinomas and Intracranial Neoplasms at Vanderbilt University where he trains residents in these disciplines and in conducting clinical trials, and participates in multidisciplinary conferences and specialty clinics in these areas. He has also been the Institution’s lead investigator in stereotactic radiosurgery since 1996, and has developed new technologies and treatment strategies for a number of disease processes, both benign and malignant, including radiosurgery for essential tremor and Parkinson's tremor, trigeminal neuralgia, and for skull based tumors. He has authored over a hundred publications on new techniques and treatment outcomes.