"The cut will see about 20 to 30 per cent retrenched and this could be after decades of service to the company. It's a shock to the community, shock to those with a family or mortgage especially when there had been no notice or consultation."
Mr Cullinan said this restructure will not just affect those losing their jobs or taking pay cuts, but also remaining staff members.
"There are 110 workers on average at a Woolies store and all will be affected as rosters will change," he said.
"People who were getting penalty rates by working weekends or late shifts might get different hours, which won't only affect their pay but also outside work commitments."
The union has lodged demands and claims for consultation as well as a dispute which will go to the Fair Work Commission.