SAN FRANCISCO, CA — September 7, 2005 — ABM Industries Incorporated (NYSE:ABM), a leading facility services contractor in the United States, today reported income from continuing operations for the third quarter of fiscal 2005 was $21.7 million ($0.43 per diluted share), up 68.2%, compared to $12.9 million ($0.25 per diluted share) for the prior year third quarter. Sales and other income for the third quarter of fiscal 2005 were $650.1 million, up 6.1% from $612.8 million in the third quarter of fiscal 2004. Net income for the quarter ended July 31, 2005, which included an after-tax gain of $14.2 million ($0.29 per diluted share) as a result of the previously announced sale of substantially all of the operating assets of CommAir Mechanical Services in the third quarter was $35.9 million ($0.72 per diluted share) compared to $13.1 million ($0.26 per diluted share) for the third quarter of fiscal 2004.

"During the third quarter, we achieved record revenue and quarterly earnings above our previous guidance," commented Henrik Slipsager, ABM's president and chief executive officer. "We experienced revenue and operating profit gains in our janitorial, parking, security and engineering segments due to contributions from acquisitions, new customers, and expansion of services with existing customers. In addition, we repurchased nearly 1.4 million shares of stock, bringing the fiscal year-to-date total to 1.6 million shares," he added.

"We successfully completed the sale of CommAir Mechanical Services during the third quarter, which highlights and reinforces ABM's strategy of focusing our financial and management resources on the businesses we are confident will grow and contribute to our position as a leading national service provider. We were also pleased with our handling of a labor dispute involving Service Employee union organizing in Houston, Texas. Despite work stoppages at various customer locations around the country, ABM was able to continue operations and provide uninterrupted service to its customers with no loss of business. The labor dispute relating to Houston has now been successfully resolved," he continued.

The 2005 actuarial report covering substantially all of the Company's self-insurance reserves was completed in the third quarter of 2005. The report showed favorable developments in the California workers' compensation and general liability claims, which required the Company to record in the third quarter of 2005 a $9.0 million pre-tax ($5.5 million after-tax or $0.11 per diluted share) benefit from the reduction of the Company's self-insurance reserve. Of the $9.0 million, $5.5 million ($3.5 million after-tax or $0.07 per diluted share) was attributable to reserves for 2004 and prior years, while $3.5 million ($2.2 million after-tax or $0.04 per diluted share) was a reduction of the insurance provision for the six months of fiscal 2005. The $5.5 million ($3.5 million after-tax or $0.07 per diluted share) was recorded by Corporate, while the $3.5 million ($2.2 million after-tax or $0.04 per diluted share) was allocated to the operating segments.

Mr. Slipsager continued, "I am very pleased that through the efforts of our safety and insurance departments, and in coordination with our service operations, the safety programs we developed and implemented have now resulted in a reduction of expenses associated with our California workers' compensation and general liability programs. These reductions will enable us to be more competitive going forward."

The Company's income from continuing operations during the first nine months of fiscal 2005 was $39.9 million ($0.79 per diluted share), up 51.5%, compared to $26.3 million ($0.53 per diluted share) for the same period last year. Sales and other income for the nine months ended July 31, 2005 were $1.93 billion, up 9.8%, compared to $1.76 billion for the comparable period last year. Net income, which includes income from discontinued operations, was $54.3 million ($1.08 per diluted share) up 102.6% compared to $26.8 million ($0.54 per diluted share) for the first nine months of 2004.

"Given the current economic climate and our improving operational strength, we are increasing our fiscal 2005 guidance for net income from $1.36 to $1.40 per diluted share. This excludes acquisitions but includes the net effect of higher than anticipated costs related to the first year Sarbanes-Oxley 404 reporting and the expected fourth quarter gain from the sale of one of our parking leases," Slipsager concluded.

Conference Call

On Thursday, September 8, 2005 at 6:00 a.m. (PDT), 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/05/q3/abm_3q2005.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 # 9050893.

About ABM Industries

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, which includes American Commercial Security (ACSS) and Security Services of America (SSA); ABM Facility Services; ABM Engineering; and Amtech Lighting Services.

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