A/Prof Lee Jiun is a Senior Consultant in the Department of Neonatology at Khoo Teck Puat - National University Children's Medical Institute, National University Hospital. He holds an MBBS from the National University of Singapore (NUS) and a MMed in Paediatrics. A/Prof Lee became a fellow of the Academy of Medicine Singapore in 1998. He joined the Department of Neonatology in 2005, serving as Head of Department until 2016.

With extensive experience in caring for sick newborns, A/Prof Lee has spent 11 years at Kandang Kerbau Hospital before joining NUH. His areas of expertise include neonatal ventilation and cardiovascular medicine. A strong advocate for evidence-based, protocolized patient care, he plays an instrumental role in improving neonatal care practices.