Fonterra has completed consulting with staff and will cut 300 roles first identified when a review of Support Services began in May.
The review is expected to be completed by October once people have worked out notice periods.
Chief executive Theo Spierings said the cooperative's review had identified opportunities to reduce duplication and layers of management within the corporate office and opportunities to progress Fonterra's strategy implementation.
"These reviews are not easy and that makes it all the more impressive that the people involved have been professional, open and honest in their views and supportive of what we're aiming to achieve," says Spierings.
"We are investing in growth and it is important to ensure our people are working on the right things and that we are spending our capital on the right priorities. We are confident the review has achieved this."