VANCOUVER, Jan. 31, 2017

MDA signs a Security Control Agreement with the U.S. Department of Defense

MacDonald, Dettwiler and Associates Ltd. ("MDA" or the "Company") (TSX:MDA), a global communications and information company, today announced that the Company, together with its wholly-owned subsidiary, SSL MDA Holdings, Inc. based in San Francisco, CA, and the U.S. Department of Defense have executed the signing of a Security Control Agreement.

This completes an important step in the process to position the Company to more effectively pursue the U.S. Government space and defense markets.

The Company will now pursue facility security clearance for its operations in Palo Alto, CA to fully execute the Company's broader U.S. growth strategy.

About MDA

MDA is a global communications and information company providing operational solutions to commercial and government organizations worldwide.

MDA's business is focused on markets and customers with strong repeat business potential, primarily in the Communications sector and the Surveillance and Intelligence sector. In addition, the Company conducts a significant amount of advanced technology development.

MDA's established global customer base is served by more than 4,800 employees operating from 15 locations in the United States, Canada, and internationally.

The Company's common shares trade on the Toronto Stock Exchange under the symbol "MDA."

Related Websites

www.mdacorporation.com

Forward-Looking Statements

This release contains forward-looking statements and information, which reflect the current view of MacDonald, Dettwiler and Associates Ltd. ("MDA" or the "Company") with respect to future events and financial performance. The forward-looking statements in this regard include statements regarding the potential for the award of government contracts in certain markets.  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 contracts with any government agency not being entered into or granted. 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, but are not limited to: changes in government priorities, mandates, policies, funding levels contracts and regulations, including the grant and maintenance of security clearances.

For additional information with respect to certain of these risks or factors, plus additional risks or factors, reference should be made to the Company's continuous disclosure materials filed from time to time with Canadian securities regulatory authorities, which are available online under the Company's profile at www.sedar.com  or on the Company's website at www.mdacorporation.com.

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

SOURCE MacDonald, Dettwiler and Associates Ltd.

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CONTACT: Wendy Keyzer, MDA External Relations, (604) 231-2743, wendy@mdacorporation.com

RELATED LINKS
http://www.mda.ca

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