Dr Neomal (Nemes) Sandanayake graduated in medicine from The University of Sydney in 1998, undergoing his physician and gastroenterology training at Royal Prince Alfred, Concord and Royal North Shore Hospitals between 1998 and 2005. He moved to the United Kingdom in 2006 for an endoscopy Fellowship at University College London Hospital, and between 2007 and 2010 undertook research for which he was awarded a Doctor of Philosophy in Medicine by The University of Sydney.

In addition to his private practice, Nemes Sandanayake is a Visiting Medical Officer at Royal North Shore, North Shore Private and some other private hospitals.. He has previously been a Staff Specialist in Hepatology at Concord Hospital.

He is a member of the Gastroenterological Society of Australia and the American College of Gastroenterology. He regularly attends meetings in Australia and overseas, is active in research in gastrointestinal cancer, and has published original works. He is involved in undergraduate and postgraduate teaching at The University of Sydney and at Royal North Shore.

He has certification in endoscopy, colonoscopy and ERCP, is interested in all aspects of gastroenterology, including liver and pancreatic disease, and inflammatory bowel disease.