ENSR has established a Technical Advisory Board (TAB) that will provide the company with strategic input to assist in the development and application of the company's innovative environmental characterization and remediation technologies, as well as the definition of leading-edge environmental issues. ENSR, part of AECOM, is a leading global environmental services provider.

ENSR's TAB is comprised of ten senior industry experts, with Dr. Raymond C. Loehr, Professor Emeritus of the University of Texas ? Austin, as the Chairperson. Dr. Loehr has significant expertise in industrial and hazardous waste management technologies for contaminated liquids, slurries, soils, and sediments. Six TAB members are external to the company and are from industry and academia; the other four TAB members are from ENSR's senior management team.

Dr. David Nakles, Technology Director for ENSR's Integrated Site Closure Service Line, will serve as the ENSR lead for the TAB. Dr. Nakles has 30 years of experience in the environmental business, and is a specialist in managing multi-disciplinary environmental research programs for the utility and petroleum industries.

?The TAB will be an important resource for ENSR's service line leaders going forward,? Dr. Nakles commented. ?ENSR has tremendous technical capabilities due to our outstanding personnel, and we want to make sure we leverage that advantage in every phase of our business.?

In addition to Dr. Loehr, the external TAB members are:

• Patrick Atkins, Ph.D., former Corporate Director of Environmental Affairs and Environmental Stewardship, Alcoa;
• Walter Carey, Ph.D., former Director of Environmental Operations, Regulatory/Policy, Nestle' USA;
• Tim Oppelt, former Director, National Risk Management Research Laboratory, U.S. EPA; former Director, National Homeland Security Research Center, Office of Research and Development, US EPA;
• Terry Yosie, President & CEO, World Environment Center; former Director, EPA Science Advisory Board; former Vice President, Responsible Care, American Chemistry Council; member, National Research Council's Board on Environmental Studies and Toxicology;
• Arturo Keller, Ph.D., Professor, University of California-Santa Barbara, Bren School of Environmental Management, with expertise in water quality management and the fate and transport of pollutants, including organic liquids (NAPLs) and organic pesticides.

ENSR TAB members, in addition to Dr. Nakles, include: Mr. Todd Schwendeman ? ENSR VP, Director of Integrated Site Closure; Mr. Mike Beck, ENSR Senior VP of Innovation; and Mr. Bob Weber, ENSR President and CEO.

About ENSR

ENSR is a leading worldwide environmental firm serving industrial clients and government agencies with 2,500 employees from 90 global offices. ENSR provides comprehensive consulting, engineering, remediation, and environmental health and safety (EHS) management solutions. ENSR is the recipient of numerous industry, client EHS, business achievement and organizational innovation awards. For more information, please visit: www.ensr.aecom.com

About AECOM

AECOM (NYSE: ACM) is a global provider of professional technical and management support services to a broad range of markets, including transportation, facilities, environmental and energy. With more than 31,000 employees around the world, AECOM is a leader in all of the key markets that it serves. AECOM provides a blend of global reach, local knowledge, innovation and technical excellence in delivering solutions that enhance and sustain the world's built, natural and social environments. AECOM serves clients in more than 60 countries and had revenue of more than $4 billion for the 12-month period ended June 30, 2007. More information on AECOM and its services can be found at www.aecom.com.

ENSR
Maryellen Frawley, 800-722-2440
mfrawley@ensr.aecom.com