Dr Halland, while born in Norway, has a longstanding connection with Newcastle. He arrived here in 2000 to study medicine and ended up staying 13 years before his career shifted to Mayo Clinic in the USA. There, he underwent two year-long subspecialty fellowships in esophageal and motility, completed a PhD and worked as a specialist for number of years before returning to Newcastle in 2022. 

Dr Josh McCarthy is a specialist gastroenterologist and hepatologist. 

Dr Dan Oliver is a Staff Specialist Gastroenterologist and Hepatologist at Calvary Mater Newcastle, with active roles in clinical research, medical education and mentoring. His interests include inflammatory bowel disease, gastrointestinal cancer screening, liver disease, and disorders of gut-brain interaction. With extensive experience in diagnosing and treating a wide range of gastrointestinal conditions, Dr Oliver is dedicated to providing compassionate care, ensuring patients feel understood, supported and valued throughout their healthcare journey.