Chubb Insurance of Canada Chooses MS/B IntegriclaimTM) For Property Loss Estimating

MISSISSAUGA AND TORONTO, ONTARIO – AUGUST 11, 2005 – Marshall & Swift / Boeckh (MS/B), the leading worldwide provider of building cost data and estimating technology to the property insurance industry, and Chubb Insurance of Canada, a subsidiary of the worldwide property and casualty company Chubb, announce the implementation of MS/B’s IntegriClaim(TM) property claim estimating technology as a desktop application into Chubb’s property claims management process. Chubb Insurance of Canada, located in Toronto, will use IntegriClaim to help facilitate its continued development in the Canadian market.

“The existing association between MS/B and Chubb has allowed more of a strategic, value-based relationship going forward,” says Jonathan Kost, Vice President of Claims at MS/B. “This relationship is key to helping Chubb Insurance of Canada continue its success in the Canadian market and we believe IntegriClaim will assist them in maintaining outstanding customer service.”

IntegriClaim is the leading suite of property claims solutions in the P & C industry. It delivers productivity improvement and helps reduce severity in the property claims process by providing more consistent and accurate estimates reflective of the localized costs. This is made possible with the use of total component data researched from nearly 100 unique cost locations in Canada. IntegriClaim is available as a desktop, network, or Web-based application. Because of the flexibility of the Web-based application, IntegriClaim Express(TM), the estimating tool is able to be delivered on any Windows-based, browser-enabled PC or handheld device.

About MS/B

Marshall & Swift / Boeckh (MS/B), an MDA company, is a leading supplier of local building cost information, residential and commercial property valuation technology and services for the property and casualty insurance sector in the United States and Canada. MS/B has five offices throughout Canada and the U.S. For information about claims products, please visit MS/B’s Web site at http://www.msbinfo.com.

About MacDonald, Dettwiler and Associates Ltd. (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 in business and government organizations
worldwide.

MDA employs more than 2,500 people in locations across the United States,
Europe, and Canada. The company trades on the Toronto Stock Exchange
under the symbol TSX:MDA.