Dr. Yoon is an Associate Professor of Oncology and Co-Chair of the Gastroesophageal Cancer Disease Group at the Mayo Clinic in the U.S. His clinical/translational research focus is to enhance immunotherapy strategies and genomics-driven clinical care in gastroesophageal cancer. He serves on the guidelines panel of the U.S. National Comprehensive Cancer Network (NCCN) for Gastric/Esophageal Cancer and Unknown Primary. He has also served on the Esophageal/Gastric Working Group of the U.S. NCI Alliance cooperative group and is a frequent speaker at internationally/nationally attended scientific and educational cancer conferences.