Dr Gray is a orthopaedic surgeon with a fellowship in spinal surgery practicing in Sydney, Australia.  He completed his orthopaedic surgery training in Sydney with the Australian Orthopaedic Association and was admitted to the Royal Australasian College of Surgeons as a Fellow in 2008.

He did further training in Adult and Paediatric spinal surgery in Toronto, Canada.  His scope of practice includes paediatric and adult spinal disorders including surgical management of paediatric scoliosis, adult degenerative and deformities, spinal trauma and tumours.  Dr Gray also has an interest in Minimally Invasive Spinal Surgery (MISS) for which he did specialised training in Toronto, Canada.

Dr Gray is a consultant orthopaedic surgeon - spinal surgery at Royal North Shore Hospital, Westmead Teaching Hospital and the Children's Hospital at Westmead.

His private practice is based at Westmead Private Hospital, North Shore Private Hospital and The Sydney Adventist Hospital.