The man crushed to death in a lift shaft at a Southland Fonterra factory has been named as David Shaw, 39, of Christchurch.
Mr Shaw was crushed on top of a lift in the dairy factory at Edendale, near Gore, on Thursday night.
His body was not discovered until Friday morning.
He was contracted by a lift company to help with the installation of a new drier as part of a $200 million development at the dairy cooperative's factory.
A Fonterra spokesperson will only say the contractor was believed to have died in the lift shaft overnight.
But the Department of Labour says the man was working on top of a lift when he died and it is investigating how that happened.
It is the third serious injury investigation the department has conducted at the Edendale plant in less than a year.
The results of the other two investigations have not been made public, and Fonterra is not commenting about the safety record of its factory.
In December last year, a teenage construction worker was crushed and seriously injured when a concrete slab weighing more than a tonne fell into the trench where he was working.
In January, five people were hospitalised following an explosion at the plant.
The construction site at the Edendale plant was closed on Friday, but the dairy factory was not affected.