Dr Davies grew up in central Queensland and completed undergraduate degrees in Commerce and Science through University of Queensland, before moving to graduate medical school at UQ where he graduated from medicine in 2009. After working in Brisbane and Townsville as a junior resident, he moved to Newcastle in 2012 and completed his physician training and cardiology training in the Hunter New England Health Network. He was awarded Fellowship of the Royal Australasian College of Physicians in 2017.

He then completed an interventional cardiology fellowship at John Hunter Hospital in 2017, before moving to London, UK in 2018 to undertake further training at The Royal Brompton & Harefield Hospitals. The Royal Brompton is a specialist valve centre and Allan was able to learn cutting edge techniques to treat heart valve disease, in particular mitral valve and aortic valve disease.

Allan is an Honorary Senior Lecturer with the University of Newcastle and a Board Reviewer of the European Heart Journal and an Associate Editor for Heart, Lung and Circulation.

Dr Davies works at the John Hunter Hospital as a Staff Specialist Interventional Cardiologist and is part of the structural heart team undertaking mitral and aortic valve procedures. He also participates in the primary angioplasty program to treat patients with acute myocardial infarction and is an educational supervisor for the advanced trainees. He also consults privately and undertakes procedures at Lake Macquarie Private Hospital and Lingard Private Hospital.