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, primarily in the Communications sector and the Surveillance and Intelligence sector. In addition, the Company conducts a significant amount of advanced technology development. MDA's established global customer base is served by more than 4,800 employees operating from 15 locations in the United States, Canada, and internationally. The Company's common shares trade on the Toronto Stock Exchange under the symbol TSX:MDA. For more information, visit www.mdacorporation.com

ABOUT SSL MDA HOLDINGS, INC.

SSL MDA Holdings, Inc. is a wholly owned subsidiary of MacDonald, Dettwiler and Associates Ltd. and serves as the operating company for all MDA businesses. SSL MDA Holdings is headquartered in San Francisco, California.

ABOUT DIGITALGLOBE

DigitalGlobe is a leading global provider of high-resolution Earth-imagery products and services sourced from our own advanced satellite constellation and third-party providers. Our imagery solutions support a wide variety of users in defense and intelligence, civil agencies, mapping and analysis, environmental monitoring, oil and gas exploration, infrastructure management, Internet portals, and navigation technology. Each day users depend on us to better understand our changing planet in order to save lives, resources and time.

CONTACTS

Investor relations: Marissa Poratto, MDA, (604) 331-2044, mporatto@mdalimited.ca
Media relations (Canada): Wendy Keyzer, MDA, (604) 231-2743, wendy@mdacorporation.com 
Media relations (United States): Sheila Ennis, Abernathy MacGregor, (415) 926-7961, sbe@abmac.com

SOURCE MacDonald, Dettwiler and Associates Ltd.