Calibre Group has been awarded a $150 million EPCM contract for Rio Tinto's Yandicoogina iron ore mine.
The contract is part of Rio's wider US$1.7 billion Yandicoogina Sustaining Project.
Calibre says the aim of the work is to extend the life of the iron ore mine in the Pilbara to 2012, and expand its capacity from 53 million tonnes per annum to 56 million tonnes.
A second wet processing plant is also being added to maintain product specification and provide another platform for further expansion.
Calibre has been working at the site since 2002, and was part of the mine's expansion from an 18 mtpa operation to the current 53 million tonnes.
The project is scheduled for completion in the first half of 2015, with the implementation phase of the work employing around 800 people.