SAN FRANCISCO – June 1, 2005 – ABM Industries Incorporated (NYSE:ABM) will announce its financial performance for the company’s second quarter that ended on April 30, 2005 on Tuesday, June 7, 2005 after the market closes.

Early the next day, on Wednesday, June 8, 2005 at 6:00 a.m. (PDT), ABM will host a live webcast of remarks by President & Chief Executive Officer Henrik C. Slipsager, and Executive Vice President & Chief Financial Officer George B. Sundby. Individuals interested in participating in the conference call are asked to register at 415/733-4061 by Thursday, June 2, 2005.

The webcast will be accessible at www.irconnect.com/primecast/05/q2/abm_2q2005.html. Listeners are asked to be online at least fifteen 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 one year.

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 877/440-9648 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 # 6676327.

ABM Industries Incorporated is among the largest facility services contractors listed on the New York Stock Exchange. With fiscal 2004 revenues in excess of $2.4 billion and more than 73,000 employees, 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; Ampco System Parking; ABM Security Services, which includes American Commercial Security Services (ACSS) and Security Services of America (SSA); ABM Facility Services; ABM Engineering; and Amtech Lighting Services.