He was a founding shareholder and director of Open Country Dairy, New Zealand's second biggest milk processor.
At the New Zealand Dairy Board he was corporate finance manager and treasury manager for what was known as New Zealand Milk, which was the value-added side of the board's business.
From July 1 the REL board will be comprised of Mr Atherfold, deputy chairman Rodger Finlay, Sir Selwyn and David Cushing.