MacDonald, Dettwiler and Associates Ltd., a provider of essential information solutions, announced today that the engineers association (SPATEA) of its Brampton, Ontario operations has withdrawn its services. The current collective agreement expired on December 31, 2005. The Company will continue its effort to reach a new collective agreement.

For further information: Wendy Keyzer, MDA External Relations, (604) 231-2743, wendy@mdacorporation.com