Associate Professor Stacey Tay is currently Senior Consultant in the Division of Paediatric Neurology and in the Division of Paediatric Genetics and Metabolism at the Khoo Teck Puat-National University Children's Medical Institute, National University Hospital, as well as Associate Professor of Paediatrics, Yong Loo Lin School of Medicine.

She obtained her basic MBBS medical degree from the National University of Singapore with honours in 1994 and subsequently attained her postgraduate paediatric degrees (MMed, S'pore, MRCP, UK and MRCPCH, UK) in 1997. She won the NUH Young Doctor's Award in 2001 for her research on diagnostic methods in Duchenne Muscular Dystrophy. She became a Fellow of the Academy of Medicine, Singapore in 2004.

 
Her specialist Paediatric Neurology Training was undertaken at the Neurological Institute of New York at Columbia University where she was on a clinical and research fellowship from 2002 to 2004. She pursued her interest in neurogenetic and mitochondrial disorders under the mentorship of Professor Marc C Patterson and Prof Salvatore DiMauro.

Following training, she returned to National University Hospital where she has established the Neurogenetic Clinic, as well as the research and teaching arms of the division, founding a group that studies the genetics of paediatric neurological diseases, and conducts regular paediatric neurology teaching rounds. In her clinical work, she looks after children with neurogenetic disorders, neuromuscular disorders, movement disorders and epilepsy.

A/Prof Tay is actively involved in the special needs community and has professionally supported organisations such as the Muscular Dystrophy Association of Singapore and Ronald McDonald House Charities.