Grant Petrie qualified from Cambridge University and then went to Bristol University Veterinary School as a Junior Fellow in Canine Medicine. He subsequently undertook specialist training in Small Animal Internal Medicine at the Royal Veterinary College, London. After a period in a private referral practice, he returned to the RVC as a Lecturer in Small Animal Medicine. Grant now runs an internal medicine second opinion/referral service at the London Vet Clinic and Bayswater Referral Clinic. He has a particular interest in endocrine diseases, especially diabetes mellitus. Aside from his clinical roles, Grant has been involved with the profession in numerous other ways. He has delivered lectures and seminars on various aspects of small animal internal medicine to undergraduates, veterinary nurses, and veterinary surgeons in the UK and overseas for the past 25 years. He has acted as a consultant for several pharmaceutical & nutrition companies, particularly in relation to the development and use of products for endocrine diseases. He has been a volunteer for the British Small Animal Veterinary Association since 2001, with a specific interest in, and passion for, developing and delivering continuing education to the veterinary profession. He was President of the BSAVA from 2010-2011. He has been a government advisor, an expert witness and he has also served on BVA & RCVS Committees.