Callum has been working as a consultant gastroenterologist in Australia for 10 years. He started working at St John of God Murdoch in 2012.

His specialist interests are inflammatory bowel disease and intestinal failure. He is however familiar with all aspects of general gastroenterology and is an experienced endoscopist having practiced endoscopy for 15 years.

He studied medicine at the University of Liverpool in the UK, graduating in 1992. He achieved Membership of the Royal College of Physicians in 1998 and Fellowship of the Royal Australian College of Physicians in 2007. He was awarded his MD in 2000. He works at the Centre for Inflammatory Bowel Diseases, at Fiona Stanley Hospital. He also leads the Intestinal Failure Unit at Fiona Stanley, which manages patients with Short Bowel Syndrome and other serious nutritional problems.

He is the chair of the Morbidity and Mortality meetings at Fremantle Hospital, which oversee gastroenterology and endoscopy quality control. Callum is also Chair of the Endoscopy Craft Group at St John of God Murdoch Hospital.The group overseas quality control and audit and is the body representing the endoscopists and gastroenterologists in the hospital.

Callum lives in Cottesloe with his three kids and two dogs and goes to the beach whenever he can.