Douglas K. Rex, MD, FASGE, is Distinguished Professor of Medicine at Indiana University School of Medicine, Chancellor’s Professor at Indiana University Purdue University Indianapolis, and Director of Endoscopy at Indiana University Hospital in Indianapolis. He co-authored the colorectal cancer screening recommendations of the American College of Gastroenterology (ACG) and the U.S. Multi-Society Task Force on Colorectal Cancer. He also authored the recommendations on quality in colonoscopy of the U.S. Multi-Society Task Force on Colorectal Cancer and the ACG/American Society for Gastrointestinal Endoscopy (ASGE). He has authored more than 200 original research papers, 55 book chapters, 200 invited papers, 40 editorials, and 40 guideline papers. He is the current chair of the U.S. Multi-Society Task Force on Colorectal Cancer. He served in the ACG as Chairman of the Board of Governors and is a Past President of the ACG. He is a member of the Governing Board of ASGE and a recipient of the Rudolph V. Schindler Award from ASGE.