"For some time now, the business has been implementing new systems and processes to drive efficiencies and savings in the co-operative, which we are able to pass on to our customers," he said.
Despite emailing replies to questions as requested, Wratt did not answer whether the Dunedin jobs would be replaced by six new positions in Christchurch, whether redundancies covered all the lost positions or how many staff were left in Dunedin.
"It is with regret that, consequently, a number of positions in the business are no longer required," Wratt said in his response.
Chamber of Commerce chief executive Dougal McGowan said when contacted while Dunedin's small to medium businesses, 20 or fewer employees, were "doing well", it was "unusually the big businesses" at the forefront of change.
"Christchurch is heading into the growth phase, from its rebuild. This has created a competitive advantage for them.
"Since about October new business facilities and infrastructure are now in place, [internet] connectivity, automation, transport and distribution," McGowan said of Christchurch.
Dunedin still retained "opportunities" for businesses, including Port Otago's trade route access and Gigatown, with its cheaper access to ultra-fast broadband for three years.
"We have to reconnect with these major [retail] chains' head offices to grow our competitiveness," he said.
Wratt said Foodstuffs was consulting the Dunedin staff, asking for alternative proposals and discussing the options available to them.
He could not yet confirm the number of staff affected, or the timing of the change, he said.
One source said Wratt and another member of management visited Dunedin last week and outlined closure of the Dunedin office.
Jobs would be moved to Christchurch, under six new positions.
Positions would be lost from early October through to the end of November.
While it was understood all staff would receive redundancy payments, that was "little comfort" for staff who had been "loyal through many decades of service," another source said.
Wratt said until the consultation process was complete he was unable to provide any further detail.
"Our priority is to ensure affected team members and their colleagues have ample support and clear communications, with the opportunity to feedback on the process," he said.