April 29, 2008

MDA to supply information solution for Japan's H2 Transfer Vehicle

Richmond, B.C. - MacDonald, Dettwiler and Associates Ltd. (TSX: MDA), a provider of essential information solutions, announced today that it has signed a multi-million dollar contract with Mitsubishi Heavy Industries of Japan to provide critical elements to assist the capture and mating of Japan's H2 Transfer Vehicle with the International Space Station. Six units will be supplied starting 2009 through 2012.

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 earth and space based 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.