Dr Ooi Choon Jin Ooi obtained his MBBS from National University of Singapore and attained his higher degree from the Royal College of Physicians, United Kingdom. He is a fellow of the Royal College of Physicians, Edinburgh and the Academy of Medicine Singapore. From 1998 to 2000, he trained at the Center for the Study of Inflammatory Bowel Disease at Massachusetts General Hospital and Harvard Medical School.
He is an Adjunct Associate Professor at the Duke-NUS Medical School. He is a Consultant Gastroenterologist at Gleneagles and Farrer Park Medical Centre and a Visiting Consultant to the Inflammatory Bowel Disease Centre at Singapore General Hospital.
He previously served as Chairman of the Chapter of Gastroenterologists, Academy of Medicine Singapore and President of the Gastroenterological Society of Singapore. He is the Vice President of the Asian Pacific Association of Gastroenterology (APAGE) and the lead for APAGE Working Group on IBD.