Vancouver, BC - MacDonald, Dettwiler and Associates Ltd. ("MDA" or the "Company") (TSX: MDA), a global communications and information company, today announced that its U.S. business unit, SSL, was selected to provide a spacecraft platform for a NASA Discovery Mission to explore the metallic asteroid 16 Psyche. SSL will work for NASA’s Jet Propulsion Laboratory (JPL) to support Principal Investigator Dr. Lindy Elkins-Tanton, director of Arizona State University’s (ASU) School of Earth and Space Exploration, in a mission to research the 210 km diameter asteroid, which is believed to be the only place in the solar system where a metal planetary core can be studied.

When finalized, the contract with SSL is expected to exceed US$75 million (approximately CA$100 million), and represents the second major U.S. Government project for the company in recent months, demonstrating growing momentum in this sector. As the industrial partner for the Psyche asteroid exploration mission, SSL will provide the “power-propulsion chassis,” a highly capable composite structure spacecraft platform equipped with a high-power solar electric propulsion (SEP) system.

“We are very pleased to be able to serve NASA and the U.S. government on an increasing number of missions,” said Howard Lance, chief executive officer of SSL MDA Holdings. “SSL brings a depth of resources and experience to scientific missions such as the exploration of 16 Psyche and we are committed to demonstrating how we can deliver innovative solutions to U.S. civilian, defense and intelligence agencies going forward.“

The NASA Discovery Program goal is to deepen the knowledge of our solar system by launching modest cost-capped missions on a routine cadence. Scheduled to launch in the 2020s, the Psyche mission was selected for flight out of five Discovery Mission candidates.

“Our many years of experience and success in building state of the art spacecraft, position us well to support NASA programs and to contribute to this NASA Discovery Mission,” said John Celli, president of SSL. “SSL is honored to partner with ASU and JPL to enable this ground breaking research, which will help us better understand the early days of the solar system and formation of terrestrial planets.”

The spacecraft design is based on the SSL 1300 platform, which has been proven on more than 100 missions, and has the flexibility to serve a broad range of applications, ranging from space exploration and remote sensing to commercial communications. SSL is also contributing to a variety of other next generation U.S. government missions, including the Restore-L mission for NASA’s Goddard Space Flight Center, which will demonstrate the ability to extend the life of a satellite in Low Earth Orbit (LEO), and the Dragonfly program for NASA and DARPA, which will demonstrate on orbit satellite assembly.

About SSL

SSL, a subsidiary of MDA, is a leading provider of commercial satellites with broad expertise to support satellite operators and innovative space related missions. The company designs and manufactures spacecraft for services such as direct-to-home television, video content distribution, broadband internet, mobile communications, and Earth observation. As a Silicon Valley innovator for more than 50 years, SSL’s advanced product line also includes state-of-the-art small satellites, and sophisticated robotics and automation solutions for remote operations. For more information, visit www.sslmda.com.

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.

MacDonald, Dettwiler and Associates Ltd.'s common shares trade on the Toronto Stock Exchange under the symbol "MDA."

Related Websites
www.mdacorporation.com

Forward-Looking Statements
This release contains forward-looking statements and information, which reflect the current view of MacDonald, Dettwiler and Associates Ltd. (“MDA” or the “Company”) with respect to future events and financial performance. The forward-looking statements in this regard include statements regarding the award of a government contract. Any such forward-looking statements are based on MDA’s current expectations, estimates, projections and assumptions in light of its experience and its perception of historical trends. The factors and assumptions underlying the forward-looking statements in this release include contracts with any government agency not being terminated. Any such forward-looking statements are subject to a number of risks and uncertainties that could cause actual results to differ materially from current expectations. MDA cautions readers that should certain risks or uncertainties materialize, or should underlying assumptions prove incorrect, actual results may vary significantly from those expected. The risks that could cause actual results to differ from current expectations include, but are not limited to: changes in government priorities, mandates, policies, funding levels, contracts and regulations; failure of third parties and subcontractors; and failure of systems to meet performance requirements.

For additional information with respect to certain of these risks or factors, plus additional risks or factors, reference should be made to the Company’s continuous disclosure materials filed from time to time with Canadian securities regulatory authorities, which are available online under the Company’s profile at www.sedar.com or on the Company's website at www.mdacorporation.com.

The Toronto Stock Exchange has neither approved nor disapproved the form or content of this release.