John graduated in 1988 with honours from the University of Sydney and worked for five years in small animal practice in Canberra, before completing a small animal medicine residency at the University of California at Davis.
He then spent four years as lecturer in small animal medicine at the University College Dublin prior to joining the Animal Referral Hospital in 1993.
John has advanced training in veterinary immunology and genetics, and extensive experience working with dog and cat breed clubs in Europe and the USA. He was awarded a PhD in Comparative Pathology in 2005 by the University of California at Davis, investigating causes for autoimmunity in dogs. John has published extensively in both veterinary and medical literature. His current research is directed at molecular causes for diseases in dogs and cats, with specific emphasis on mitochondrial DNA defects, haematologic diseases and breed-associated autoimmunity.
John is a Diplomate of both the American and European Colleges of Veterinary Internal Medicine (ACVIM and ECVIM). He receives referrals in all aspects of canine and feline medicine including gastroenteric, cardiothoracic, haematologic, neurologic, genetic, immune and endocrine disease.