"From time to time, we evaluate our business and processes to ensure that we are operating effectively," he said.
E tū Union organiser advocate Norm Mouritsen said the timing of the decision is ridiculous.
"It's an insensitive and pathetic time to do it," he said.
"There's no reason in the world why any company needs to do this, especially this company, just a few weeks before Christmas."
E tū are representing 17 of the 23 affected by the restructure.
Mouritsen said there has been mixed feelings about the situation - but those who have been around for 30 to 40 years seem content about taking severance.
"There are some who think it's great after a long duration of service they can get a good package - for others it's just shock," he said.
"We have an excellent collective agreement that has brilliant terms and conditions for redundancy."
However, he said that almost everyone affected went off on sick leave or stress leave for the first few days: "that's how bad it was."
The company's spokesman said Heinz-Wattie's remains committed to treating everyone involved with dignity and respect.
"Our objective is to minimise the impact on people as much as possible while evolving our operations in a progressive way, responding to market changes and consumer preferences," he said.
Hastings Mayor Sandra Hazlehurst said it's really difficult for the community to face job losses after the challenges of this year.
"Heinz Wattie's remains committed to Hastings and they will be looking at efficiencies and making tough decisions regarding their staffing," she said.
"There are a lot of job opportunities in various industries across our district and we encourage the affected workers to use the support available to them to help pathway into a new exciting career."