Holcim Ltd will take over operations of the Kiwi Point Quarry in Wellington.
The company has signed an agreement with Atom Hire Ltd to operate the Kiwi Point and Martinborough Sand and Gravel operations from August 1.
The quarry, located in Ngauranga Gorge, produces around 350,000 tonnes of aggregates each year.
The aggregates are used in concrete construction and for asphalting roads and highways across the Wellington region.
Martinborough Sand and Gravel processes alluvial material in the Southern Wairarapa and supplies the local and Wellington region market.