South Africa-based Pepkor bought the company for an undisclosed sum last month, and while Murray also would not comment on the sale price, he said Pepkor's ability to invest in Postie was paramount.
"The more important thing for us is that we've committed, independent of the price, to make sure there is sufficient capital in the business that we can invest where needed," he said.
Since being taken over by administrators, Postie had shut a number of its stores, with 64 across New Zealand being included in the sale.
Pepkor has since confirmed more than 530 of the 560 staff from Postie Plus had accepted offers of employment under the new owners.
According to Murray, Postie Plus was already in a difficult position when Pepkor first began looking into the purchase, with big debts and little capital.
He also said that while Pepkor had "no immediate major changes" planned, he did want customers to understand that they were going to see a new Postie.
"We want to create a famous new Postie that has the heritage and the brand, but also leverages everything we can give it as well as our experience," Murray said.
He said Pepkor had a clear strategy for the coming year with the business focusing initially on stabilising, and then growing Postie Plus through having "better product, lower prices, better stores and better store experience".
Pepkor would also continue to focus on online sales for the business, an area where Murray said they had a lot of experience overseas.