After completing medical training at Monash University, Dr Wheeler was a medical resident and registrar at Monash Medical Centre prior to commencing Radiation Oncology training at Peter Mac. After gaining the FRANZCR he completed a fellowship at The St Jude Childrens research hospital in memphis TN, USA. Dr Wheeler became Chair of the Paediatric and Late Effects Service at Peter Mac in 2005 and is particularly interested in ameliorating the long term effects from radiotherapy.