ALS LIMITED — M&A Activity 2011

Jul 4, 2011

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5[th] July 2011

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

Dear Sir / Madam

RE: MONADELPHOUS ACQUIRES PEARLSTREET ENERGY SERVICES PTY LTD

Please find attached a copy of the media release to be issued today by Monadelphous Group Limited.

Yours sincerely,

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Philip Trueman Company Secretary

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ASX MEDIA RELEASE 5[th] July 2011

MONADELPHOUS ACQUIRES PEARLSTREET ENERGY SERVICES PTY LTD

Leading engineering group Monadelphous Group Limited (ASX: MND) (“Monadelphous” or “the company”) is pleased to announce it has concluded a purchase agreement for the acquisition of asset management company PearlStreet Energy Services Pty Ltd (“PearlStreet”).

PearlStreet manages two long-term operations and maintenance contracts in the power sector in Western Australia. The contracts comprise a Collie Basin coal infrastructure operations and maintenance contract with Verve Energy and a plant operations and maintenance agreement with the Tiwest Joint Venture KMK Cogeneration Plant at Kwinana. The Verve Energy and Tiwest contracts have four and three years to run respectively, with a combined value of approximately $50 million.

Monadelphous has acquired 100 per cent of the shares of PearlStreet, a wholly owned subsidiary of Campbell Brothers Limited, for a cash consideration of approximately $4 million.

Monadelphous Managing Director Rob Velletri said the acquisition was part of the company’s market growth strategy.

“PearlStreet will enable Monadelphous to strengthen its operations and maintenance capabilities, as well as expand its services into the power sector,” Mr Velletri said.

PearlStreet became part of the Infrastructure division on 1 July, 2011.

Further Information

Rachael CutlerInvestor Relations Manager+61 8 9315 7429+61 457 539 985rcutler@monadel.com.auAnalysts/Investors		Brett LaneGroup Communications Manager+61 8 9315 7385+61 411 177 809blane@monadel.com.auMedia

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. The mining and energy sectors have been the major focus of Monadelphous’s work but the company is becoming increasingly diversified with growing involvement in the infrastructure sector. For more information or to join our free email alerts service visit:www.monadelphous.com.au