ABM Industries Schedules Fourth Quarter Earnings Announcement and Investor Webcast

SAN FRANCISCO, December 4, 2007 – ABM Industries Incorporated (NYSE:ABM) will announce its financial performance for the company’s fourth quarter that ended on October 31, 2007 on Tuesday, December 11, 2007 after the market closes.

Early the next day, on Wednesday, December 12, 2007 at 6:00 a.m. (PST), ABM will host a live webcast of remarks by President and Chief Executive Officer Henrik C. Slipsager, and Executive Vice President and Chief Financial Officer George B. Sundby.

The webcast will be accessible at www.irconnect.com/primecast/07/q4/abm_4q2007.html Listeners are asked to be online at least 15 minutes early to register, as well as to download and install any complimentary audio software that might be required. Following the call, the webcast will be available at this URL for a period of 90 days.

In addition to the webcast, a limited number of toll-free telephone lines will also be available for listeners who are among the first to call 800/524-4293 within fifteen minutes before the event. Telephonic replays will be accessible during the period from two hours to seven days after the call by dialing 800/642-1687, and then entering ID #27182430.

About ABM Industries

ABM Industries Incorporated (NYSE:ABM) is among the largest facility services contractors listed on the New York Stock Exchange. With fiscal 2006 revenues in excess of $2.7 billion and more than 75,000 employees prior to the OneSource merger, ABM provides janitorial, parking, security, engineering and lighting services for thousands of commercial, industrial, institutional and retail facilities in hundreds of cities across the United States and British Columbia, Canada. The ABM Family of Services includes ABM Janitorial Services; Ampco System Parking; ABM Security Services; ABM Facility Services; ABM Engineering; and Amtech Lighting Services.

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CONTACT:
ABM Industries Incorporated
George B. Sundby, Executive Vice President and
Chief Financial Officer
(415) 733-4000