Dr. Kessel has been on the faculty of UTMB since 2001. He is a medical graduate of the University of the Witwatersrand in Johannesburg, South Africa and a board certified Radiation Oncologist. He did his residency training at the Johannesburg Hospital and at the Princess Margaret Hospital in Toronto, Canada. Dr. Kessel served 6 years on the faculty of the University of Witwatersrand/Johannesburg Hospital, and 10 years in private practice before joining the faculty of UTMB. He directs the Thoracic, GI, and Head & Neck Cancer services in the department of Radiation Oncology. He is the principal investigator for the Radiation Therapy Oncology Group (RTOG) at UTMB.