Space Infrastructure Servicing Update

For immediate release: January 11, 2012

Space Infrastructure Servicing Update

Richmond, B.C. - MacDonald, Dettwiler and Associates Ltd. , a provider of essential information solutions, announced today that as previously reported, MDA has not yet made a decision to proceed with its commercial Space Infrastructure Servicing Initiative.

The MDA/Intelsat Agreement announced March 15, 2011, has ceased to be in effect.

MDA is continuing to pursue opportunities in this area and is currently focused on bidding a space servicing Broad Agency Announcement from a U.S. Government agency, which is due in February.

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 .

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Forward-Looking Statements

This release contains forward-looking statements and information, which reflect the current view of MacDonald, Dettwiler and Associates Ltd. ("MDA") with respect to future events and financial performance. The forward-looking statements in this regard include statements regarding MDA's Space Infrastructure Servicing Initiative pursuits. Any such forward-looking statements are based on MDA's current expectations, estimates, projections and assumptions in light of its experience and its perception of historical trends. The factors and assumptions underlying the forward-looking statements in this release include bids not being disqualified. Any such forward-looking statements are subject to a number of risks and uncertainties that could cause actual results to differ materially from current expectations. MDA cautions readers that should certain risks or uncertainties materialize, or should underlying assumptions prove incorrect, actual results may vary significantly from those expected. The risks that could cause actual results to differ from current expectations include failure of third parties and subcontractors; failure to maintain technological advances and market position; failure of systems to meet performance requirements; changes in government priorities, funding levels, contracts and regulations; satellite failure; and failure to anticipate changes in technology, technical standards and offerings or comply with the requisite standards.

For additional information with respect to certain of these risks or factors, plus additional risks or factors, reference should be made to MDA's continuous disclosure materials filed from time to time with Canadian securities regulatory authorities, which are available online at .

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

For more information, please contact:

Wendy Keyzer
MDA External Relations
Telephone: [phone]
E-mail: [e-mail]