The news follows this week's leadership change where Bob Humphris resigned as chairman, to be replaced by CEO Marcelino Fernandez Verdes.

It also comes after a three-month review of Leighton’s businesses and operations since its Spanish-owned majority shareholder Hochtief took control of 62.6% of Leighton in March.

Called a “strategic blueprint”, Leighton said the restructure would help strengthen its balance sheet, streamline its operating model and improve project delivery.

“The services, property and John Holland businesses will be subject to the outcome of the strategic review and a final decision is yet to be made,” Verdes said.

“As part of this process we have engaged external advisors and will be having discussions with potential investors.

“Streamlining our operating model will allow us to better leverage the existing expertise that resides across the group’s diverse operations and increase our transparency.

“By reorganising these activities we will create economies of scale, thereby lowering our cost base and helping to improve our competitive advantage and create value for the benefit of all stakeholders.”

The streamlining of operations will see Leighton’s businesses and activities reshuffled into strategic arms focused on the areas of construction, mining, public private partnerships and engineering.

As part of the review, Leighton will also focus on recovering existing receivables and on improving working capital management.

“Cash receipts from receivables and divestments will be used to reduce our gearing and strengthen our balance sheet, so as to increase our competitiveness,” Verdes said.

All of Leighton’s activities are set to continue unaffected until the restructure is completed.