Under the agreement with engineering giant Bechtel, ATCO's Australian subsidiary will design, manufacture, transport and install the units.
ATCO said Thursday it expects the contract to create 137 new jobs, including 42 manufacturing jobs in Perth and Brisbane and 95 jobs on site at Ashburton North, some 10 kilometres west of Onslow in Western Australia.
The units supplied will be used to form a variety of office complexes and free standing modular buildings on site, including training centres, IT buildings, guardhouses and medical centres.
The Wheatstone Project, one of Australia's largest resource projects, will consist of two LNG trains with a combined capacity of 8.9 million tonnes per year and a domestic gas plant.
ATCO Structures & Logistics is part of the ATCO Group of Companies, which has more than 9,400 employees.