MDA Reports Second Quarter Results

Richmond, B.C. - MacDonald, Dettwiler and Associates Ltd. (TSX: MDA), a provider of essential information solutions, today reported financial results for its second quarter ended June 30, 2006. Net earnings for the quarter increased 27% to $20.8 million, or $0.48 per diluted share, compared to $16.4 million, or $0.41 per diluted share, reported for the second quarter of 2005.

Consolidated revenues for the three months ended June 30, 2006 increased 11% to $241 million compared to $217 million for the same period of last year. Information Products revenues increased to $156 million for the quarter. The Company's U.K. property information business delivered strong financial results as transaction volume from its NLIS operations continued to rise. During the quarter, the Company also completed several strategic acquisitions in Ireland and the United Kingdom, further advancing its strategy to be a leading supplier of property information throughout the British Isles. These acquisitions will help secure, consolidate and automate access to property information and markets. Subsequent to the quarter, there were several developments in the U.K. related to the HIPs program. MDA has evaluated these developments and continues to proceed with its HIPs initiative. The Company's Information Systems business also made strategic progress and reported revenues of $85 million for the quarter. The Company continued to pursue strategic contracts with government and commercial customers. Firm and funded backlog attributed to Information Systems as at June 30, 2006 amounted to $572 million.

On a year-to-date basis, consolidated revenues were $474 million, up 13% over the same period of last year. Information Products revenues increased to $282 million and Information Systems revenues increased to $192 million. Net earnings increased 31% to $40.7 million, or $0.95 per diluted share, compared to $31.2 million, or $0.78 per diluted share, for the six months ended June 30, 2005.

	Three months ended June 30,			Six months ended June 30,
	2006	2005		2006	2005
($ millions, except per common share amounts)
Consolidated revenues	240.7	217.2		474.1	418.6
Earnings before income taxes	29.5	24.5		57.7	44.5
Net earnings	20.8	16.4		40.7	31.2
Net earnings per diluted share	0.48	0.41		0.95	0.78

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 Second Quarter 2006 unaudited Consolidated Financials are available at: http://www.mdacorporation.com/investor/financial_reports.shtml

Investor/Analyst Conference Call Today

MDA President and CEO Daniel Friedmann and Executive Vice President and CFO Anil Wirasekara will be available on a Conference Call today, July 26, 2006 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 1-866-898-9626 in Canada or the United States
In Toronto, dial 416-340-2216

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

Related Websites:
www.mdacorporation.com

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.