John is a clinical senior research fellow at the Wolfson Wohl Cancer Research Centre in the school of cancer sciences and an honorary consultant paediatric and neonatal surgeon at the Royal Hopsital for Children in Glasgow.

John has trained in academic paediatric surgery and regenerative medicine throughout the UK, Including Edinburgh, London and Southampton.

John's main research focus is investigating the causes of congenital biliary and liver disease, and in doing so identifying potential therapeutic targets that regenerative medicine approaches can be applied to.