Leighton subsidiary Thiess has won a $330 million Samsung C&T contract to build the mine process plant facilities at the $10 billion Roy Hill iron ore project in the Pilbara.
The contract includes construction of the structural, mechanical, piping, electrical and instrumentation works, which are being designed and supplied by Samsung.
Work is expected to begin onsite in July and generate up to 1000 jobs for about 14 months.
Roy Hill is majority owned by Gina Rinehart's Hancock Prospecting. Other shareholders include POSCO, Marubeni Corporation and China Steel Corporation.
Samsung C&T is the lead contractor of the project.
Roy Hill is about 280km south of Port Hedland.