Nat graduated from Glasgow in 1992. Following a brief spell in mixed practice he pursued advanced small animal training in the USA, completing an Internship and working in transfusion medicine at the University of Pennsylvania before completing a Medicine/Cardiology Residency at the University of Wisconsin. On returning to the UK, he moved to the University of Bristol to undertake a PhD in immunology, studying regulatory T-cells.
Nat joined Davies Veterinary Specialists in 2005, where he sees medicine and cardiology referrals and is a Director. Nat has published and spoken at national and international meetings on cardiology and internal medicine. He maintains a strong interest in haematology and transfusion medicine, immunology and ardiology.