The Warehouse Group is proposing to cut 190 jobs at its Auckland support offices.
In a statement, a spokesperson for the group said the company had shared the restructuring proposal with staff on Wednesday.
"This proposed change will allow us to deliver even more value to our customers and further align our digital capabilities while responding to challenging market conditions."
The restructuring does not affect any store employees.
First Union general secretary Denis Maga told Midday Report it was a big company and they hoped there could be opportunities for redeployment.
The Warehouse Group spokesperson said they were consulting with their teams on the proposal.