Leighton subsidiary John Holland has won a $100 million mine infrastructure contract at Rio Tinto's Yandicoogina iron ore project in the Pilbara.
A John Holland spokesman said the the contract related to sustaining tonnes at the project.
The project is scheduled to begin on site later this month and be completed in April next year.
It is expected to employ as many as 200 people at its peak.
John Holland group managing director Glenn Palin said the award reflected John Holland's industry leading skills in the delivery of mine infrastructure.
Leighton shares last traded yesterday for $20.90.