Dr David Ong is a senior consultant gastroenterologist at the Mount Elizabeth Orchard Medical Centre. He sees patients with problems with their stomach, bowel and liver. His area of sub specialty interest is in inflammatory bowel disease (Ulcerative colitis and Crohn’s disease) with a focus on colorectal cancer surveillance and the gut microbiome. Dr Ong set up the Inflammatory bowel disease unit at the National University Hospital (NUH) and has published widely in this area and has been a speaker at local and global conferences. In addition, he has served on multiple advisory boards of pharmaceutical companies, advising them on new treatments and advances in this field. In the area of the gut microbiome, Dr Ong was the first doctor in Singapore to perform a fecal microbiota transplant (FMT) on a patient with recurrent clostridium difficile colitis in 2014 and has since set up Southeast Asia’s first and only stool bank (Asian Microbiome Library) and gut precision microbiome company to advance this field. Dr Ong was the Head of Gastroenterology and Hepatology at the National University Hospital (NUH), Singapore and remains a visiting senior consultant to NUH. Whilst at NUH, he had held the positions of divisional Director of Clinical Services, Director of Risk and Values at the NUHS cluster and Associate Chairman Medical Board (medicolegal risk), NUH. Dr Ong holds an Adjunct Associate Professorship at the National University of Singapore (NUS), Department of Medicine and is also an advisor to and chair of the nomination committee of the International Council, NUS Yong Loo Lin School of Medicine. Nationally, Dr Ong serves as the incoming President of the Gastroenterological Society of Singapore (GESS) and the honorary secretary of the Chapter of Gastroenterology, Academy of Medicine. In addition, Dr Ong has served as a member of the Singapore Medical Council (SMC) Complaints Panel since 2016.