MDA Reports Third Quarter 2007 Results

Richmond, B.C. - MacDonald, Dettwiler and Associates Ltd. (TSX: MDA), a provider of essential information solutions, today reported financial results for the third quarter ended September 30, 2007.

Consolidated revenues for the third quarter of 2007 amounted to $292 million compared to $290 million for the third quarter of 2006. Information Products revenues increased to $214 million from $196 million for the same period last year. Strong organic growth in the U.K. had resulted in an 18% increase of U.K. Information Products revenues. Information Systems had a lower quarter due to certain program delays, resulting in revenues of $78 million compared to $94 million for the third quarter a year ago. Third quarter net earnings were $24 million, or $0.54 per diluted share, an increase of 13% compared to $21 million, or $0.49 per diluted share, for the same period last year.

For the year to date, consolidated revenues increased to $910 million from $765 million for the first nine months of 2006. Information Products revenues were $642 million, up 34% compared to the same period last year and Information Systems revenues were $268 million compared to $286 million for the same period of 2006. For the first nine months of 2007, net earnings increased to $65 million, or $1.48 per diluted share, compared to $61 million, or $1.44 per diluted share, for the prior year period. Results reported for 2007 have been and continue to be impacted by start-up expenses and other one-time costs related to ramping up the Company's Home Information Pack business and the strengthening Canadian dollar.

	Three months ended September 30,		Nine months ended September 30,
	2007	2006	2007	2006
($ thousands, except per common share amounts)
Consolidated revenues	$291,997	$290,170	$910,096	$764,831
Earnings before income taxes	31,337	28,860	87,521	86,551
Net earnings	23,502	20,779	64,697	61,451
Net earnings per diluted common share	0.54	0.49	1.48	1.44

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 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.

MDA's Third Quarter 2007 unaudited consolidated financial statements are available at: http://www.mdacorporation.com/investor/financial_reports.shtml

Investor/Analyst Conference Today

MDA President and CEO Daniel Friedmann and Executive Vice President and CFO Anil Wirasekara will be available on a Conference Call today, October 30, 2007 at 2:30 p.m. Pacific (5:30 p.m. Eastern) to explain the financial results of the Company and to answer questions.

To participate, dial 1-888-575-8232 in Canada or the United States
In Toronto, dial 416-406-6419

The Conference Call will also be Webcast live and archived at:
http://www.mdacorporation.com/investor/events.shtml

Telephone replay will be available until November 6, 2007 at the following numbers:

Toll free, International, dial 1-800-408-3053
In Toronto, dial 416-695-5800
Pass Code 3238762

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. 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.