MDA announces strategic acquisition in the U.S. financial services sector

Richmond, B.C. - MacDonald, Dettwiler and Associates Ltd. (TSX: MDA), a provider of essential information solutions, announced today a strategic expansion of its Information Products business in the United States. The Company has entered into a definitive agreement to acquire certain lender solution businesses from TransUnion LLC's Real Estate Services division. The acquisition is expected to be slightly accretive in 2008 and more significantly in 2009 once the transition period has been completed.

The acquired business includes collateral valuation solutions, property search solutions, mortgage credit solutions, closing solutions, and flood compliance solutions, all of which are designed to drive time, cost, and risk out of the residential lending cycle. Headquartered in Wilmington, Delaware, the business generates approximately U.S. $130 million in annualized revenues with approximately 450 employees.

'This acquisition significantly expands our presence in the U.S. financial services sector,' stated Daniel Friedmann, president and CEO of MDA. 'In addition to increasing our lender customer base, the products and services acquired round out our capability as a full service provider of residential property information solutions to lenders in the United States. This brings the scope of our lender solutions in the U.S. up to a similar level as the scope of our insurance solutions.'

'Our team is pleased to be joining MDA and to be a pivotal part of MDA's Information Products strategy in the U.S.,' affirmed Mike Dealy of TransUnion, who will continue to lead the acquired business. 'By combining our customer base and our extensive suite of lender solutions with MDA's customer base and MDA's powerful property data warehouse, automated decisioning tools, and interactive valuation capability we can offer our joint customers a broader range of solutions.'

The transaction is expected to close by the end of the first quarter 2008, subject to receipt of required approvals and the acquired business will operate under an MDA brand name.

About MDA

MDA provides advanced information solutions that capture and process vast amounts of data, produce essential information, and improve the decision making and operational performance of business and government organizations worldwide.

Focused on markets and customers with strong repeat business potential, MDA delivers a broad spectrum of information solutions, ranging from complex operational systems, to tailored information services, to electronic information products.

MDA employs more than 3,000 people in locations across the United States, the United Kingdom, and Canada. The Company's common shares trade on the Toronto Stock Exchange under the symbol TSX:MDA.

About TransUnion

As a global leader in credit and information management, TransUnion creates advantages for millions of people around the world by gathering, analyzing and delivering information. For businesses, TransUnion helps improve efficiency, manage risk, reduce costs and increase revenue by delivering comprehensive data and advanced analytics and decisioning. For consumers, TransUnion provides the tools, resources and education to help manage their credit health and achieve their financial goals. Through these and other efforts, TransUnion is working to build stronger economies worldwide. Founded in 1968 and headquartered in Chicago, TransUnion employs more than 4,000 employees in more than 30 countries on six continents.

Related Websites:
www.mdacorporation.com
www.transunion.com

Forward-Looking Statements

This release contains forward-looking statements and information, which reflect the current view of MacDonald, Dettwiler and Associates Ltd. with respect to future events and financial performance. Any such forward-looking statements are subject to risks and uncertainties and MDA's actual results of operations could differ materially from historical results or current expectations. Additional information on these and other potential factors that could affect MDA's financial results are detailed in documents filed from time to time with the applicable Canadian securities regulatory authorities.

The Toronto Stock Exchange has neither approved nor disapproved the form or content of this release.