Simon qualified from the University of Edinburgh in 1992 at which time he undertook a one year internship in small animal medicine and surgery at the University of Guelph in Canada. After spending two years in small animal practice in the UK, Simon began a three year residency in neurology and neurosurgery at the University of Florida. In 1998, he was appointed assistant professor of Neurology / Neurosurgery at the University of Georgia. In 2000, he became head of the neurology unit at the Animal Health Trust in Newmarket where he stayed until 2007 at which time he moved back to UGA as associate professor of neurology/neurosurgery. Simon is a Diplomate of the American College of Veterinary Internal Medicine in Neurology and of the European College of Veterinary Neurology (ECVN) as well as being a RCVS recognized specialist in Veterinary Neurology. Simon is currently the ACVIM Neurology Specialty President. He is also co-editor of the BSAVA manual of Canine and Feline Neurology and the forthcoming Manual of Small Animal Neurological Emergencies.