Campbell is a surgical consultant at VetCare and has seen the practice grow from one vet in 1988 to its current quota of six vets. Time spent in the Veterinary Faculty of Massey University as their "Practioner on residence" in 1995 has helped Campbell develop additional skills in orthopaedic surgery (bones and joints) and in the use of endoscopy (flexible video-scope to examine inside the body).

Campbell has been a member of Bethlehem School Committees and is currently involved with the local Pony Club. In his spare time he enjoys being a part-time sheep and beef farmer.