MacDonald, Dettwiler and Associates Ltd. (“MDA” or the “Company”) (TSX: MDA), a global communications and information company, announced today that it has started work under three Authorizations to Proceed (ATP), totalling approximately CA$5 million to provide multiple communications satellite subsystems. The contracts are expected to total approximately CA$22 million and are likely to finalize over the coming months.

One ATP is for the provision of multiple communications satellite subsystems to EADS Astrium. The subsystems are intended for the Telstar 12N telecommunications satellite that will provide coverage over Europe, North America, South America and the Caribbean.

Two ATP’s were received from undisclosed customers to provide advanced satellite subsystems to be integrated into two telecommunications satellites.

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. In addition, the Company conducts a significant amount of advanced technology development.

MDA’s well-established global customer base is served by more than 4,500 employees operating from 11 offices located in the United States, Canada, and internationally.

The Company’s common shares trade under the symbol TSX:MDA.