Australian contractor Maca has secured a contract worth A$115m ($85.2m) to provide open-pit mining services at Blackham Resources' Matilda gold project near Wiluna.
Under the contract, Maca will perform activities such as drilling, blasting, loading and hauling.
Maca will work on the project for around 32 months. The project is expected to provide 100 jobs at its peak and will require some new equipment.
It will also use the majority of Maca's otherwise idle mobile plant and equipment.
Mobilisation to site is already underway and mining operations are set to start soon.
Maca operations director Geoff Baker said: "We are delighted to have been selected preferred contractor and look forward to developing a long-term working relationship with the Blackham team at the Matilda project."
The Matilda gold project incorporates more than 780km² of tenements, including Regent and the Matilda and Williamson gold mines.
These tenements cover around 45km of strike along the Wiluna mine sequence and 10km of strike along the Coles find sequence.
The Matilda mine was previously named Mt Wilkinson and was operated by Chevron Exploration and Eon Metals.
Production at the mine was ceased by Eon Metals in 1992 due to weak gold prices.