Dr. Chun is a Radiation Oncologist practicing at the MD Anderson Proton Center and West Houston Campus and co-host of the NRG Oncology Podcast. As Director of Radiation Oncology Clinical Research for the MD Anderson Houston Area Locations, Dr. Chun led the expansion of the radiation oncology clinical trial program across the MD Anderson integrated academic satellite network and is supported by extramural grant funding from the National Institutes of Health as Principal Investigator. In the MD Anderson Houston Area Locations, Dr. Chun implemented the stereotactic body radiotherapy (SBRT) program for pancreatic cancer as well as the frameless stereotactic radiosurgery (SRS) program for brain metastases. With NRG Oncology, Dr. Chun is active with the Lung Core, Radiation Oncology and Protocol Operations Management Oversight Committees. As an active clinical researcher, Dr. Chun has published in journals such as the Lancet, the Journal of Clinical Oncology, the Journal of Thoracic Oncology and JAMA Oncology.