ATS to Host Fourth Quarter Conference Call Wednesday June 10, 2009 at 10:00 AM Eastern


CAMBRIDGE, ON, May 27 - ATS Automation Tooling Systems Inc. today
announced it will report its fourth quarter results before the market opens on
Wednesday, June 10, 2009.

At 10:00 a.m. eastern Wednesday, June 10, 2009, the Company will host a
conference call and webcast of management's quarterly remarks and follow up
question and answer period with analysts.

The listen-only webcast can be accessed live at www.atsautomation.com.
The conference call can be accessed live by dialing 416 644 3414 five minutes
prior.

A replay of the conference will be available on the ATS website following
the call. Alternatively, a telephone recording of the call will be available
for one week (until midnight June 17, 2009) by dialing 416 640 1917 and
entering passcode 21307332 followed by the number sign.

About ATS

ATS Automation Tooling Systems Inc. provides innovative, custom designed, built and installed manufacturing solutions to many of the world's most successful companies. Founded in 1978, ATS uses its industry-leading knowledge and global capabilities to serve the sophisticated automation systems' needs of multinational customers in industries such as healthcare, computer/electronics, energy, automotive and consumer products. It also leverages its many years of experience and skills to fulfill the specialized automation product manufacturing requirements of customers. Through Photowatt Technologies, ATS participates in the growing solar energy industry as an
integrated manufacturer of ingots, wafers, cells and modules. Photowatt-branded products and systems serve businesses, institutions and homeowners in established and emerging markets. ATS employs approximately 2,700 people at 17 manufacturing facilities in Canada, the United States, Europe, Southeast Asia and China. The Company's shares are traded on the Toronto Stock Exchange under the symbol ATA. Visit the Company's website at www.atsautomation.com.

For further information:

Maria Perrella, Chief Financial Officer; Carl
Galloway, Vice-President, Treasurer, (519) 653-6500

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