Prof Reuben is an Associate Professor of Medicine, and adjunct faculty at the National Univeristy of Singapore. Apart from being a practising specialist in Gastroenterology & Hepatology, he is also a Fellow of the American Gastroeneterological Assocation, Royal College of Physicians and Academy of Medicine (Singapore). Reuben completed his sub-specialty training at the University of North Carolina Chapel Hill under the mentorship of Professors Douglas Drossman and William Whitehead of the Rome Foundation. He honed his skills in the management of complex functional gastrointestinal disorders within a multi-disciplinary setting, and trained in esophageal motility and anorectal manometry testing. In his near two decades of public service, he introduced High Resolution Esophageal Manometry to and grew the utility of pH-Impedence testing in Singapore. He is also actively involved in drafting the new language for both upper and lower gut motility testing, and sits on both the International Anorectal Physiology Workgroup, the Esophageal Chicago IV Revision Committee. He was also involved with the SAGES POEMS guidelines workgroup, and is a co-chair on the Rome V Chapter Committee. With his passion for education, Reuben is actively involved in post-graduate teaching, and leads GIMotility, an internationally renowned upper and lower motility hands-on teaching course. Reuben has key publications in the field of IBS, chronic constipation and gut motility, as well as being recognised for his work on quality improvement in colon cancer screening. He was part of the Rome Global Study workgroup, and lectures with the International Scientific Association for Probiotics and Prebiotics. He has an acive interest in the realm of gut microbiota, and was part of the team that introduced Fecal Microbiota Transplantation to Singapore. Reuben is a founding partner of gutCARE, where his clinical practice is based. He’s actively involved in church and community service, and enjoys time with his wife Jane and their four kids.