MONADELPHOUS GROUP LIMITED — Capital/Financing Update 2011

May 2, 2011

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3[rd] May 2011

Company Announcements Australian Securities Exchange Limited Level 4, 20 Bridge Street SYDNEY NSW 2000 AUSTRALIA

Dear Sir / Madam

RE: MONADELPHOUS CONTRACTS UPDATE

Please find attached a copy of the media release to be issued today by Monadelphous Group Limited regarding the award of maintenance and construction contracts with a combined value of approximately $200 million.

Yours sincerely

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Philip Trueman Company Secretary

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ASX MEDIA RELEASE

3[rd] May 2011

MONADELPHOUS CONTRACTS UPDATE

Leading engineering group Monadelphous Group Limited (ASX: MND) (“Monadelphous” or “the company”) today announced it has secured maintenance and construction contracts with a combined value of approximately $200 million. The contracts and work are with major customers in the resources, energy and infrastructure markets.

The new maintenance contracts and contract extensions awarded to Monadelphous total approximately $140 million. They comprise:

• A three-year contract for sustaining capital work with Queensland Alumina Limited at its Gladstone Alumina Refinery in Queensland.

• A one-year maintenance services contract with Rio Tinto Dampier Salt in Western Australia.

• A one-year extension of a general maintenance, services and projects contract with Chevron (W.A. Oil) at Barrow Island and Thevenard Island in Western Australia.

• Support to BHP Billiton’s Olympic Dam copper-uranium operation in South Australia for a further three years. Monadelphous has been working at Olympic Dam for more than 20 years.

The new construction contracts awarded to the company total approximately $60 million. They comprise:

• Structural mechanical work for Rio Tinto at its iron ore operation at Cape Lambert, Western Australia.

• A contract with MCC Mining (Western Australia) Pty Ltd for additional pipe works associated with the concentrator at Citic Pacific’s Sino Iron project at Cape Preston, Western Australia.

• A mechanical and electrical installation package at the Boyne Smelter Development Project with Rio Tinto Alcan Boyne Smelters Limited at Boyne Island, Queensland.

• The electrical and instrumentation installation for Newcrest Lihir Gold Limited at the Million Ounce Plant Upgrade Project at Lihir Island, Papua New Guinea.

• The construction of a new waste water treatment plant for the Clarence Valley Council in New South Wales.

“The contracts reflect the importance we place on developing and maintaining long term relationships with quality customers. They also reflect the depth of our capabilities across our core resource and energy markets, our continued diversification into infrastructure and our strong geographical reach,” Monadelphous Managing Director Rob Velletri said.

Further Information

Analysts/Investors Media Rachael Cutler Brett Lane Investor Relations Manager Group Communications Manager +61 8 9315 7429 +61 8 9315 7385 +61 457 539 985 +61 411 177 809 rcutler@monadel.com.au blane@monadel.com.au

Monadelphous Group Limited is a leading Australian engineering group providing services to the resources, energy and infrastructure industry sectors. The company has a solid track record in the safe and effective delivery of complex and large-scale engineering construction projects and maintenance and industrial services for industry throughout Australia. Monadelphous’s capabilities encompass civil, mechanical, structural and electrical disciplines. Although the mining sector has been the major focus of Monadelphous’s work, the company is becoming increasingly diversified with growing involvement in the energy and infrastructure sectors. For more information or to join our free email alerts service visit: www.monadelphous.com.au.