September 12, 2011

MDA provides continued support for International Space Station

Richmond, B. C. - MacDonald, Dettwiler and Associates Ltd. (TSX:MDA),a provider of essential information solutions, announced today that it has received an initial authorization valued at CA$4.66 million on a contract amendment from the Canadian Space Agency (CSA) exercising an option to extend the contract from May 2012 to March 2013. This amendment brings the total contract value to CA$137.9 million.

MDA is providing logistics and sustaining engineering for the Mobile Servicing System (MSS). The MSS, which includes Canadarm2, Dextre (the robotic handyman onboard the Station) and a Mobile Base System, was developed by MDA under contract to the CSA as Canada’s contribution to the International Space Station.

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.

The Company's common shares trade on the Toronto Stock Exchange under the symbol (TSX: MDA).

Related Websites:
www.mdacorporation.com
www.asc-csa.gc.ca