Of the "disestablished" jobs, 21 are in the Auckland region and 22 in the Wellington region covering the lower half of the North Island.
"We find [the job losses] unacceptable in Auckland given the population and the associated risks," said Mike McEnaney, Auckland branch president of the Professional Firefighters Union. He said changes affecting volunteer staff and fire risk management were causing "huge dissatisfaction".
"There's no doubt this will lead to a reduction in efficiency of the Fire Service and one of the outcomes will be more people put at greater risk."
Volunteer brigade chiefs spoken to by the Herald were concerned that any extra work arising from the loss of paid support staff would worsen already serious recruitment shortages in towns and districts.
George Verry, president of the United Fire Brigades Association which represents volunteers, said volunteers were still digesting the proposals and some could see benefits. But the loss of paid support was emerging as a big concern and any reduction in the emphasis on the fire safety message would be opposed.
Fire Service assistant national commander Paul Baxter said a major focus of the changes was to make things easier for volunteers. It was proposed to merge and centralise fleet and property management functions, freeing up region managers to concentrate on fire risk and their staff.