A/Prof Marion Aw is a Senior Consultant in Paediatric Gastroenterology, Nutrition, Hepatology, and Liver Transplantation at Khoo Teck Puat - National University Children's Medical Institute, National University Hospital (NUH). She also serves as a Senior Consultant in the Paediatric Liver Transplantation Programme at the National University Centre for Organ Transplantation. Additionally, A/Prof Aw is an Associate Professor at the Yong Loo Lin School of Medicine, National University of Singapore. Her areas of expertise include paediatric gastrointestinal diseases, hepatology, liver transplantation, and paediatric nutrition.

A/Prof Aw completed her undergraduate medical training at NUS and received post-graduate paediatric training at NUH. She further honed her skills at the Paediatric Liver Unit in London, UK, before returning to Singapore. She has a particular interest in paediatric liver diseases and feeding issues, founding the Interdisciplinary Feeding and Nutrition Clinic at NUH in 2013. A/Prof Aw is also dedicated to medical education, holding leadership roles at both NUH and NUS, where she contributes to the training of future medical professionals.