Peter Graham graduated from the University of Glasgow Vet School in 1989, where he remained as Small Animal House Physician and Research Scholar until 1995. During this period he was awarded the RCVS Certificate in Veterinary Radiology and a PhD on the Epidemiology and Management of Canine Diabetes Mellitus. Between 1995 and 2002, Peter was Assistant Professor at the world's largest specialist veterinary endocrinology laboratory in Michigan State University, USA, leading it as Section Chief from 2000. He was awarded Diplomate of the European College of Veterinary Clinical Pathologists in 2002. At the end of 2002, he was appointed Managing Director of NationWide Laboratories and Cambridge Specialist Laboratory Services, (trading businesses of Dechra Pharmaceutical plc).
In July 2014, he joined the School of Veterinary Medicine and Science at Nottingham University as a Clinical Associate Professor. He has co-ordinated the ESVE External Laboratory Quality Assurance Scheme since 2012.