The contract is expected to create 400 jobs over a variety of construction trade fields with most of them based on Barrow Island while some new administration-related roles will be at Downer's Perth office.
While the contract is initially for 12 months, there are options to extend it.
"Downer is a leading Australian construction contractor and we have a proven track record in oil and gas," Downer CEO Grant Fenn said of the contract win.
Downer said the scope of the work may include:
- Structural and piping erection;
- Mechanical installations;
- Electrical and instrumentation services;
- Miscellaneous civil works;
- Pre-commissioning works; and
- Commissioning and start-up assistance.
The $US54 billion ($A58.2 billion) Gorgon project is targeting first LNG production in mid-2015. Separate 65km and 130km pipelines will link the offshore fields to the three-train, 15.6 million tonnes per annum plant being built on Barrow Island.
The Barrow facilities also include a 300 terajoule per day domestic gas plant to supply Western Australia's domestic market.
The Gorgon joint venture comprises Chevron (47.3%) ExxonMobil (25%), Royal Dutch Shell (25%), Osaka Gas, Tokyo Gas and Chubu Electric Power which each have a holding of less than 2%.
