Nathan qualified in Sri Lanka in 1981 and joined the Medway Veterinary team in 1992. He was appointed Clinical Director in 2006. Nathan is an RCVS Advanced Practitioner in both Small Animal Surgery and Small Animal Dermatology.

After being certified in dermatology, Nathan had a clinical attachment with the department of dermatology at The Royal Veterinary College. He was also an advisor for veterinary surgeons taking the RCVS Certificate in Small Animal Dermatology.