For immediate release: February 12, 2004

MDA's Year End and Fourth Quarter 2003 Results Conference Call Alert

Richmond, B.C. - MacDonald, Dettwiler and Associates Ltd. (TSX: MDA) plans to release year end and fourth quarter 2003 financial results at close of market on Tuesday, February 17th.

MDA will host an earnings conference call, featuring remarks by President and CEO Daniel Friedmann, and Anil Wirasekara, Executive Vice-President and CFO, followed by a Q & A session.

The call is scheduled to begin promptly at 4:30pm Eastern Time, (1:30pm Pacific Time).

To participate, please call the conference line approximately five minutes prior to the commencement of the call:

Toll free in North America: 1-800-273-9672

In Toronto: 416-695-5806

The conference call will also be Webcast live and then archived at: http://www.mda.ca/investor/events.shtml

Related Websites:
www.mdacorporation.com



For more information, please contact: