Dr Marion Aw is a Senior Consultant in the Division of Paediatric Gastroenterology, Nutrition, Hepatology and Liver Transplantation, Department of Paediatrics, National University Health System. She is also an Associate Professor at the Yong Loo Lin School of Medicine, National University of Singapore.

She graduated from the National University of Singapore (NUS) and received her post-graduate paediatric training at the NUH. After completing her paediatric specialist training in Singapore, she spent 2 years with the Paediatric Liver Unit at King's College Hospital, London, United Kingdom. Her MD thesis (University of London) is based on clinical and research work done whilst she was there. In 2004, she was elected to Fellowship of the Royal College of Paediatrics and Child Health, United Kingdom. She is on the specialist register locally in both Paediatrics and Paediatric Gastroenterology.

Dr Aw’s area of clinical expertise is in paediatric gastrointestinal disease, hepatology and liver transplantation. She is a member of the National Liver Transplant Program. She also has an interest in nutrition and feeding issues in children. This led her to start the Interdisciplinary Feeding and Nutrition Clinic at NUH in 2013, and she remains the clinical lead for the program. In 2017, she set up the Paediatric Inflammatory Bowel Disease Regional Network and is the Chair of its EXCO.

Dr Aw has served as the Vice-President of the Singapore Paediatric Society (2013-2020), as well as in various leadership positions in the College of Paediatrics and Child Health (Treasurer, Vice-President, President).

Most recently, Dr Aw was Chair of the Paediatric Gastroenterology Subcommittee for the Asia Pan Pacific Society of Paediatric Gastroenterology, Hepatology and Nutrition (2019-2023),

In addition to clinical practice, Dr Aw is actively involved in the teaching and training of medical undergraduates and post-graduate paediatric doctors. She held various portfolios for the NUHS Graduate Medical Education Committee, including Chair of the Physician Health and Resilience Subcommittee, and was Program Director for Paediatric Residency Training. She has served as the Education Director for NUH, overseeing training for UG medical, nursing, pharmacy and allied health students, as well as Assistant Dean (Education) for the Medical School. She is currently the Vice Dean (Students), Yong Loo Lin School of Medicine.