Brierty has won a $300 million, four and a half year contract with mining giant Rio Tinto for its Western Turner syncline stage 2 project, west of Tom Price.
The contractor said design and planning works would begin immediately with mobilisation from later this month.
Brierty managing director Peter McBain said the contract was a major achievement that recognised the company's multi-disciplined capabilities as a contract miner and civil contractor.
Brierty has also signed an agreement with Aboriginal partners the Ngarluma & Yindjibarndi Foundation Ltd ("NYFL"), Karlayura Construction Services Pty Ltd and Eastern Guruma Pty Ltd, to work together with Brierty to deliver on the contract.
Mr McBain said the co-operation agreement signed between NYFL, Karlayura and Eastern Guruma Pty Ltd was particularly important to Brierty, as it would provide sustainable business partnerships and working relationships for Pilbara Aboriginal businesses.
"I am extremely pleased that we've been able to achieve a four-way agreement with our indigenous partners to deliver this contract," Mr McBain said.
"Indigenous engagement and employment is a core part of our vision at Brierty and I look forward to working with our partners to provide employment, business and mentoring opportunities through this contract.
"Brierty has been working very hard to secure additional contact mining work to build on the capability we have demonstrated with efficient and safe hematite mining and ore processing at the Karara project.
"With the mining portion of our works at Karara complete, the Rio Tinto contract provides a source of long-term revenue in addition to other long-term contracts, such as the Zuccoli development in the Northern Territory, and ongoing smaller civil contracts we continue to win."
The contract is the fifth won by Brierty from Rio since 2012, with previous works including projects in the Wickham area and the West Angelas and Brockman projects.
Brierty shares closed down half a cent at 35.5 cents, with the announcement made after the market close.