John is a general surgeon with subspecialty training in Upper Gastrointestinal Surgery and Surgical Oncology. He specialises in oesophagus, stomach, skin cancers and melanomas. He has a special interest in the laparoscopic and minimally invasive management of abdominal cancers. He is a consultant surgeon at the Peter MacCallum Cancer Care Centre. John is particularly interested in the nutritional support and exercise physiology of patients undergoing cancer operations.