Dr Chang has a degree in Medical microbiology. His undergraduate training was at Bristol Medical University and he graduated in 1982. Dr Chang spent initial house jobs in the West Country before embarking on a career in Paediatrics that spanned a wide variety of hospitals including Leicester teaching hospitals and London hospitals including Charing Cross and Westminster Children’s hospital.He undertook a year of experience as a Senior Registrar in neonatology at The Mater hospital in Brisbane, Australia before returning to the UK to complete his training in general paediatrics with specialisation in neonatal intensive care. He was appointed to Mayday hospital in 1993 where he is currently working. Dr Chang has strong links and work closely with the neonatologists at St George’s Hospital, Tooting, where he also hold an honorary senior lecturer position. Dr Chang also teaches medical students, nursing and medical staff in general paediatrics as well as neonatal intensive care. He is also a qualified Neonatal and Paediatric Advance Life support instructor.He is clinical lead in general Paediatrics and Neonates, and has an interest in research and development, sitting on the R&D committee at Mayday. Dr Chang is joint clinical lead for South West London neonatal network since 2008.