UNICCO's advanced facilities technologies include
the myUNICCO.

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The contract covers cleaning and maintenance
service for 68 DTE customer centers and business locations throughout
the state of Michigan. UNICCO offers
maintenance, operations, engineering, cleaning, lighting and
administrative/office services for multi-tenant and corporate office,
education, industrial , retail, government and public venue facilities.

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"Following the 2001 merger with the parent company of Michigan
Consolidated Gas Co.
DTE Energy Co.

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"DTE Energy selected ABM as its sole janitorial contractor to help
the company achieve merger cost savings and service efficiencies,"
said Richard Carrithers, manager, facility operations for DTE. The privately-held company has
over 55 years of facilities outsourcing experience and maintains an
industry-leading 95% customer retention rate.

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DTE Energy's largest operating subsidiaries are Detroit Edison, an
electric utility serving 2 . The Company stated that
the Board of Directors considers such purchases to be a prudent
investment by the Company.4 billion and more than 73,000 employees, ABM
provides janitorial, parking, security , engineering, lighting and
mechanical services for thousands of commercial, industrial,
institutional and retail facilities in hundreds of cities across the
United States and British Columbia, Canada . building is
designed to help CBRE achieve LEED-EB (Leadership in Energy and
Environmental Design - Existing Buildings) certification for the
facility.

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unicco.

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(NYSE:DTE).dteenergy. UNICCO, along with its cleaning product supplier,
JohnsonDiversey, has retrained the staff and has transitioned to
environmentally friendly cleaning chemicals and equipment.

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(MichCon), a natural gas
utility serving 1.
"Environmental building management is being embraced by
forward-looking building managers , such as CBRE," said UNICCO Vice
President, New England operations, John Correia.

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For further
information , call 888-751-9100 or visit http://www.

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"With
ABM's commitment to technology, our goal is to achieve savings and
efficiencies to benefit DTE and all of their customers," he added.1 million customers in Southeastern
Michigan, and Michigan Consolidated Gas Co.
"We see cleaning as integral to our environmental goals,"
commented CBRE General Manager Dana Warren.unicco.

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With fiscal 2004
revenues in excess of $2. 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, which
includes ABM Engineering and CommAir Mechanical, and Amtech Lighting.
UNICCO is also committed to green services.

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With fiscal 2004
revenues in excess of $2.shtml

About UNICCO

UNICCO Service Company is one of North America's largest
integrated facilities services companies with 19,000 employees and
$700 million in annualized revenues.

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Business Editors

SAN FRANCISCO----ABM Janitorial
Services, an operating unit of ABM Industries Incorporated (NYSE:ABM),
has been awarded a multi-year, multi-million dollar contract with DTE
Energy Co.2 million customers in Michigan.com
ABM Janitorial Services operates 111 branch offices in 42 states,
the District of Columbia and one Canadian province.

Business Editors

SAN FRANCISCO ----The Board of
Directors of ABM Industries Incorporated (NYSE:ABM) today authorized
the repurchase of up to two million shares of ABM's outstanding common
stock at any time through October 31, 2005 .
Purchases would be made from time-to-time through brokers and
dealers on the New York Stock Exchange or in privately negotiated
transactions with nonaffiliated stockholders.

UNICCO Implements Green Cleaning Program for Mellon Financial Center at One Boston Place

In addition to the direct environmental
benefits, the GreenClean program will be a major factor in helping us
achieve LEED-EB certification ."
Information on UNICCO's GreenClean program is available at:
http://www.

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A DTE Energy team, which was
later recognized with an internal customer service award, developed a
statewide process to reduce janitorial costs and ensure consistency of
service and accountability," he added. is a Detroit -based diversified energy company
involved in the development and management of energy-related
businesses and services nationwide.

UNICCO is implementing its GreenCleansm program at the site where
it is performing janitorial, day porter, window washing and snow
removal services. "They understand that
green cleaning contributes to safer working conditions for our
employees and a healthier workplace for the building's occupants. This
translates into real value for One Boston Place tenants.

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In addition to ABM
Janitorial, the ABM Family of Services includes Ampco System Parking ,
ABM Security Services, which includes American Commercial Security
(ACSS) and Security Services of America (SSA), ABM Engineering, Amtech
Lighting, CommAir Mechanical and ABM Facility Services .

ABM Industries Incorporated is among the largest facility services
contractors listed on the New York Stock Exchange.

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"We welcome the opportunity to work with DTE Energy, one of the
largest diversified energy companies serving the entire country," said
Dan Minning, senior vice president for ABM Janitorial Services.4 billion and more than 73,000 employees, ABM
provides janitorial, parking , security, engineering, lighting and
mechanical services for thousands of commercial, industrial ,
institutional and retail facilities in hundreds of cities across the
United States and British Columbia, Canada.85. ft.

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, DTE Energy managed multiple janitorial suppliers
that provided varying levels of service. Its combined electric and natural
gas utilities create a premier regional energy provider, employing
more than 11,000 people in a wide range of energy-related businesses. The green approach for the 800,000 sq. UNICCO has further committed to
ongoing staff training to help ensure continuous improvement. It delivers on the
commitment through collaboration with leading edge partners and the
use of green products and best practices, as well as through customer
awareness programs . All other trademarks
are the property of their respective owners.

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Business Editors

BOSTON----CB Richard Ellis-Whittier
Partners (CBRE) has turned to UNICCO(R) Service Company to provide
green cleaning janitorial services for Mellon Financial Center at One
Boston Place ."
In addition to the green cleaning techniques, UNICCO is
implementing an advanced inspection system using its UNI-Q(R)
hand-held PDA inspection system. This will enable supervisors and CBRE
to continuously track service levels in terms of both building
cleanliness and environmental factors .

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ABM Industries Incorporated is among the largest facility services
contractors listed on the New York Stock Exchange.

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Information about
DTE Energy is available at www.

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ABM Janitorial Services Awarded Contract With DTE Energy Co.

ABM Industries Incorporated Authorizes Buyback of Up to Two Million Shares of Company Stock

The authorized purchases
would at most approximate four percent of the 49. "UNICCO has made a public
commitment to green cleaning and has backed that up with the training
and systems needed to implement it. These were key factors in our
decision to move to UNICCO.com/services/greencleaning.com

NOTE: UNICCO, UNICCO Integrated Facilities Services and UNI-Q are
registered trademarks of UNICCO Service Company.

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7 million shares of
ABM common stock outstanding on February 28, 2005. The Company's stock
closed today at $18.com portal, UNI-Q palmtop inspection system,
eProcurement, and a 24x7 national call center.