More jobs are set to be lost at BHP Billiton as the mining giant continues to streamline its operations.

Adelaide’s InDaily is reporting workers in Adelaide have learned of the latest round of cost-cutting via email today. It’s understood 140 jobs will go.

• BHP fined $25 million

Senior management are telling staff, in correspondence sighted by InDaily, that the company is committed to “open and transparent communication”, as “continued uncertainty is difficult and everyone is seeking clarity”.

“We have finalised the organisational structure for functions and sadly a large number of our people will be impacted,” the message told workers.

“We will look for opportunities for redeloyment…please stay focussed on the work in front of you, and keep safety at the front of your mind.”

Olympic Dam currently employs around 4000 workers.

In a statement to InDaily, the company says: “At Olympic Dam, we continue to simplify our business to ensure we are operating as efficiently as possible. This is consistent with the work being done in other BHP Billiton operations, and across the resources sector, and reflects the challenging external environment.”

The company says its goal is to become “a safe, high-performance organisation with a culture of respect, simplicity and collaboration”.

“All areas of the operation, including labour productivity are being examined and we expect there will be some workforce reductions,” the statement continues.

“When these are known we will communicate with our employees who are affected quickly and respectfully. The review has been completed for the support functions of our business, and affected employees are being consulted about proposed redundancies.”

The review of operational areas is continuing.

It follows BHP’s announcement in January that it would shed jobs in SA in a bid to build a “viable business”.

Mineral Resources Minister Tom Koutsantonis is expected to address the media this afternoon.

This article originally appeared on InDaily.