MacDonald, Dettwiler and Associates Ltd. (“MDA” or the “Company”) (TSX: MDA), a global communications and information company, announced today that it has signed multiple contract amendments with the Canadian Space Agency (CSA) totaling CA$18 million to complete work in the Design Phase of the RADARSAT Constellation Mission, and to enable the remaining long lead procurement of parts and equipment, as planned. These amendments are funded from CSA’s approved budget for the Design Phase and support the Build Phase contract announced January 2013, which is currently on-going.

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.