MDA Announces Annual General Meeting

    RICHMOND, BC, April 27 /CNW/ - MacDonald, Dettwiler and Associates Ltd.
(TSX: MDA), a provider of essential information solutions, will hold its
Annual General Meeting at the Fairmont Waterfront Hotel in Vancouver on
Wednesday, May 2, 2007 at 1:30 p.m. Pacific Daylight Time.


        -  1:30-1:45 p.m.:      The formal portion of the meeting will be
        -  1:45-2:30 p.m.:      MDA president and CEO Daniel Friedmann will
                                discuss six key growth areas for 2007.
        -  2:30 p.m. onwards:   MDA's senior management will be available to
                                answer questions.

    Guests may arrive for the 1:30 p.m. or the 1:45 p.m. portion of the

    This event is open to the media.

    This event will be Webcast live and then archived at:

    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
    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.

    Related Websites:

    Forward-Looking Statement
    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.

For further information:

For further information: Wendy Keyzer, MDA External Relations, (604)

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