"The new plant adds huge scope to Rainbow's business in both New Zealand and Australia.
"We already export from New Zealand to Australia but soon we will be driving transtasman trade in both directions," he said.
"It's exciting to be able to apply the industry knowledge and production expertise we've accumulated over the past decade to this new plant and make it profitable again."
In 1995, long-standing Oamaru-based confectionery business Regina was sold to Nestle NZ, which closed the factory in 2001 and moved production to Australia.
There had been a long history of confectionery-making in the town, since Jack McNamara moved Regina Confections from Dunedin in 1949.
Private investors Patrick Betty, Rod Thornton and White then bought the assets, re-employed many of the redundant staff and started making confectionery again, including jellies, pineapple chunks and party mix. The trio added new technology and invested in the ability to produce jellybeans - the only manufacturer in New Zealand to do so.
It now had up to 100 staff at the Oamaru factory at the height of the Easter season.