He is the Roger C. Haggitt Professor of Medicine and section Chief of the Gastroenterology Division at the University of Washington Medical School. He is also a full member of the Clinical Research Division of the Fred Hutchinson Cancer Research Center. In addition to being the PI of a translational research program in GI oncology, he is a practicing gastroenterologist and is the Medical Director of the GI Cancer Prevention Program Clinic at the Seattle Cancer Care Alliance, which specializes in the care of individuals who have cancer family syndromes.