The five-year contract covers an ongoing portfolio of projects and modifications throughout the BP Kwinana complex, which is the largest capacity oil refinery in Australia, processing about135,000 barrels of oil per day.

Worley chief executive John Grill said his company held the equivalent contract at the refinery for the previous six years.

“We are delighted to continue our long-standing relationship with BP and to renew this contract for a further five years,” he said.

“The ongoing performance of this contract is a testament to our expertise in delivering projects in a complex ‘brownfield’ environment and to the way we work in an integrated manner with our clients to help them achieve outstanding results.”