Lynne qualified as a veterinary surgeon from Trinity College, Dublin and began her professional life in mixed practices in Lancashire and in Lurgan before becoming a partner in a practice in Crumlin, Co. Antrim. Lynne worked for a number of years in both the large animal and small animal arms of the practice before concentrating on small animal work. During this time, she became interested in the British Small Animal Veterinary Association (BSAVA) and was the PetSavers representative in Northern Ireland, as well as the secretary and chair of the region in the early 90's. Subsequently she became the first female President of BSAVA in 1995.
In 1996, Lynne moved to work for Hills Pet Nutrition, initially as the UK Veterinary Affairs Manager and subsequently as their European Marketing Manager, during which time she became increasingly interested in the management side of practice.
In 1998, Lynne moved to the Royal Veterinary College in London, initially to run their small animal referral hospital. In 2000, a new department was formed and Lynne became Head of the Clinical Services Department at the RVC. During her tenure there, the clinical services of the RVC grew enormously and the building programme moved forward greatly, culminating in the completion of the Queen Mother Hospital.
In 2008 Lynne became Chief Executive of Langford Veterinary Services, a company totally owned by the University of Bristol and encompassing all the veterinary teaching Hospitals (Equine and Small Animal), practices (Equine, Small Animal and Farm) and the diagnostic laboratories. During her time here, Lynne completed her Masters of Business Administration at the London Business School. She has also been a council member of the Royal College of Veterinary Surgeons for a number of years – Lynne was its President from 2005-2006 and she still sits on a number of its committees.
Lynne joined the Linnaeus Group as Chief Executive Officer at the beginning of 2015.