Worley (ASX: WOR) wins BHP Olympic Dam and Carrapateena EPCM work

Worley Limited (ASX: WOR) has secured multiple contracts from BHP Group Limited (ASX: BHP) to provide study and engineering, procurement and construction management services across potential expansion projects at Olympic Dam and Carrapateena in South Australia, strengthening its position inside one of the world’s largest copper producers’ most important growth programmes.

The scope spans potential block cave development and associated infrastructure at Olympic Dam as well as expansion of Carrapateena’s underground mining operations and processing infrastructure. Worley said initial EPCM services have already commenced for early-phase activities, while engineering and study work will continue across multiple project phases.

There is an important qualification to the award. BHP has not yet made final investment decisions on the underlying expansion projects, and Worley has not disclosed the contract value or expected revenue contribution. Investors therefore cannot legitimately convert the September 7 announcement into a specific earnings forecast.

The commercial significance instead comes from where Worley has positioned itself. BHP produced 321,000 tonnes of payable copper from its South Australian operations during FY26, while Olympic Dam achieved its highest copper production in two decades and Carrapateena recorded its strongest material mined and milled performance. BHP is simultaneously advancing a multiyear copper growth strategy designed to lift group copper production substantially through the middle of the next decade.

Why is the Worley contract important even though BHP has not disclosed its value?

Engineering contracts can be material without carrying a headline dollar value at announcement because the ultimate scope expands or contracts as a project progresses through engineering, procurement, construction and commissioning.

Worley is already involved at the study and early EPCM stage rather than waiting for construction to begin. That creates a pathway to participate across a much longer portion of the capital-project lifecycle if BHP ultimately approves the projects. The work covers underground mining, processing and associated infrastructure under what Worley describes as a connected “cave to concentrate” programme.

The distinction matters because early engineering does not guarantee Worley will capture every later package. Major miners can alter scope, split contracts among suppliers or defer projects before final investment. The current award nevertheless places Worley inside the delivery structure while BHP is still shaping project economics and design.

Worley also brings continuity. Its Asia-Pacific consulting teams have already supported BHP’s South Australian growth plans over roughly two years through development-option studies, techno-economic modelling, logistics analysis and project planning. The new contracts move that relationship further from advisory work toward execution.

That progression is more valuable strategically than an isolated engineering assignment because Worley increasingly wants to capture customers across the full project lifecycle rather than sell individual studies.

How large is BHP’s South Australian copper platform today?

Copper South Australia produced 321,000 tonnes of payable copper in FY26 compared with 316,000 tonnes a year earlier, an increase of approximately 1.6%. Gold production reached 393,000 ounces and uranium output rose to 3,600 tonnes.

Those numbers already make South Australia a substantial mining system before the next generation of projects is approved.

Olympic Dam achieved a 20-year copper production record during FY26. Carrapateena recorded record material mined and milled, while BHP completed the decline to the base of the planned Carrapateena block cave. The company has previously outlined an expansion pathway capable of taking Carrapateena toward approximately 12 million tonnes per year of underground and processing capacity, with block cave ramp-up scheduled to begin around FY2030.

At Olympic Dam, BHP is progressing underground development and broader processing infrastructure options. Worley’s new scope specifically includes potential block cave development and related infrastructure rather than only incremental maintenance work.

That is why the customer matters as much as the contract value. Worley is supporting assets with operating lives and expansion pathways measured in decades rather than a short construction programme ending after one plant is commissioned.

How does the Worley award fit BHP’s plan to make copper its biggest growth engine?

BHP produced around two million tonnes of copper globally in FY26 for a second consecutive year, and copper generated 54% of group underlying EBITDA for the first time. Management now sees copper as the main engine of organic growth.

BHP expects average capital expenditure of around US$11 billion per year over the medium term, with more than half allocated to copper growth projects. That implies more than US$5.5 billion a year of average copper-focused growth expenditure across BHP’s global portfolio, although that figure is not specific to South Australia and should not be interpreted as spending available to Worley.

The company believes its copper growth programme can increase copper production by around 40% by FY35 from the current portfolio and development pipeline. Chile, South Australia, Argentina and North American projects all contribute to that plan.

For engineering contractors, that level of capital intensity creates a large long-duration addressable market. Mine expansions require geological studies, underground engineering, materials handling, concentrators, utilities, water systems, power infrastructure, procurement and construction management.

Worley does not need to capture a large percentage of BHP’s total copper capital programme for the relationship to become commercially significant. It needs to retain a meaningful role as projects progress from studies into sanctioned construction.

Why does block cave mining make the Worley scope technically significant?

Block caving is a large-scale underground mining method in which ore is undercut and allowed to fracture and collapse under gravity, with broken material collected through underground drawpoints.

The method can support very large underground production rates, but the engineering challenge is considerable. Underground access, material handling, ventilation, crushing, conveying, processing and surface infrastructure must operate as an integrated system. Worley describes its mandate as extending across the full “cave to concentrate” chain.

That integrated scope is strategically useful because a contractor involved in both mine and processing design can help reduce interface risk between the underground operation and concentrator.

BHP has also emphasised capital intensity. The miner wants the South Australian projects to unlock additional value through targeted expansion of material-handling and concentrating facilities rather than simply maximise capital spending.

That raises the performance bar for Worley. The engineering group is not only being asked to design a bigger operation; its work must help BHP decide whether the expansion can generate adequate returns before final investment approval.

Why does the BHP award matter after Worley’s FY26 statutory profit fell sharply?

Worley reported FY26 statutory revenue and other income of A$10.714 billion, down 5% from A$11.239 billion a year earlier. Statutory EBITA fell 25% to A$614 million, while attributable NPATA declined 36% to A$306 million and statutory profit after tax attributable to shareholders fell 42% to A$238 million.

The underlying picture was less severe. Worley reported underlying EBITA of A$734 million and said results had been affected by conflict in the Middle East and adverse foreign-exchange translation. Transformation and restructuring costs of A$120 million before tax were excluded from the underlying result.

That backdrop makes contract conversion increasingly important.

Worley already generates more than A$10 billion of annual statutory revenue, so an undisclosed BHP award should not automatically be described as transformational at group level. What matters is whether large customers continue putting Worley into multi-year project delivery roles that improve future workload and margins.

Copper also fits the company’s strategic emphasis on energy-transition materials. Management has identified resources and minerals required for electrification as priority markets where project-development demand could remain strong even when spending slows elsewhere.

Why did Worley shares rise 2.8% after the BHP contract announcement?

Worley shares closed September 7 at A$10.07, up A$0.27 or 2.76% from the September 4 close of A$9.80. The shares traded above A$10 during the session following the morning announcement.

The move is constructive but should not be attributed exclusively to the BHP contracts. Worley did not disclose their value, and several market factors can influence a large ASX-listed engineering company during a trading session.

The reaction nevertheless shows that investors welcomed greater exposure to BHP’s copper programme after a difficult FY26 reporting period.

The more important valuation question comes later. Worley needs the early study and EPCM assignments to develop into larger sanctioned workloads as BHP advances Olympic Dam and Carrapateena through final investment decisions.

Until then, the contracts provide strategic visibility rather than quantified revenue.

BHP has already demonstrated that South Australia is producing more copper, gold and uranium from its existing infrastructure. Worley’s opportunity now lies in helping design the next layer of capacity without allowing engineering complexity or capital intensity to undermine the returns BHP requires.