The Zimbabwe-born pig vet moved to New Zealand in 2000 after working as a vet in several countries, including the country of his birth.
Based in Kaiapoi, Welch is one of just three specialist pig vets in New Zealand, serving close to 100 commercial pig farms spread throughout country.
He services farms throughout the South Island and in the North Island, primarily as a consultant vet.
"I do travel quite a bit, but most of it is back-up and support," he said.
NZ Pork chief executive David Baines said Dr Welch was dedicated to the welfare of pigs and supporting farmers.
"Bruce's knowledge of pigs and pig care is unparalleled and his input and influence is evident in every aspect of pig farming in New Zealand.
"That extends across productivity, animal health, welfare, antibiotic use, biosecurity, nutrition, genetics and the industry's PigCare programme.
"He is also closely involved with the current review of the welfare code."
Completing a North Canterbury double was Courtney Gloistein, of Kilgour's Farm, who was named "2021 stockperson of the year".
The award carries a $500 prize and the winner is selected from trainees who have completed the national certificate in pork production level 3, the qualification for people involved with the care of pigs in a pork production unit.