N@N

TORONTO, ONTARIO--(Marketwire - Sept. 25, 2009) - Aecon Group Inc. (TSX:ARE) announced today a joint venture in which its Buildings Division is a partner has been awarded a construction management contract for the $58 million expansion of a significant Data Centre in Markham.

The joint venture awarded the Data Centre project is owned 50% by Aecon and 50% by the Turner Construction Company of the U.S.

Under the contract, Aecon/Turner will build an 110,000 square foot expansion of the existing Data Centre facility. The two-storey construction includes associated equipment rooms, as well as business support space and site utilities.

The project will include 25,000 square feet of raised floor and will employ a fast-tracked design and construction approach. Work has begun and is expected to be complete in May of 2010.

"The combination of Turner's extensive best of class data centre experience and Aecon's well-established presence in the local market makes this partnership project an especially strong one for Aecon," said Frank Ross, President, Aecon Buildings. "We look forward to building on this solid foundation of technical expertise and local impact in our successful delivery of this new Data Centre in Markham."

Aecon Group Inc. is Canada's largest, publicly traded construction and infrastructure development company. Aecon and its subsidiaries provide services to private and public sector clients throughout Canada and on a selected basis internationally. Aecon is pleased to be recognized as one of the 10 Best Employers in Canada as published by Report on Business Magazine, as well as one of the Top 100 Employers in Canada as published in Maclean's Magazine.

Turner is the leading general builder in the U.S., ranking first or second in the major segments of the building construction field. During 2008, Turner completed $10.7 billion of construction. Turner is the only builder offering clients a nationwide network of offices across the U.S. For more information, visit Turner's website at [ www.turnerconstruction.com ].

The information in this News Release includes certain forward-looking statements. These statements are based upon assumptions that are subject to significant risks and uncertainties which are generally described in Section 3.2 "Risk Factors" in Aecon's Annual Information Form dated March 30, 2009 available on SEDAR at [ www.sedar.com ]. Although Aecon believes that the expectations reflected in forward-looking statements are reasonable, it can give no assurance that the expectations of any forward-looking statements will prove to be correct.