2002
Alcoa
Chief Industries Inc.
Conoco Inc.
Deere & Co.
Delphi Corp.
Dick Pacific Construction
The Dow Chemical Co.
GE
Georgia Pacific Corp.
Goodyear Tire and Rubber Co.
Lockheed Martin Corp.
Lozier Corp.
New York Power Authority
Petrocon Engineering
Russell Corp.
Standard Register
Weyerhaeuser Co.
2003
Bechtel Group Inc.
Bon L Manufacturing
CF Industries Inc.
CSX Transportation
DaimlerChrysler
DuPont
ExxonMobile Chemical
Haynes International Inc.
Johnson & Johnson
Koppers Inc.
MeadWestvaco Corp.
Motorola Inc.
National Gypsum
Pactiv Corp.
Quincy Compressor
Salt River Project
2004
Anheuser-Busch Inc.
Bell Helicopter
DeFabCo
Denark Construction Inc.
DSM Desotech Inc.
Energy Northwest
Ford, Bacon & Davis
Freudenberg-NOK
Inland Printing Co.
L'Oreal USA
Milliken & Co.
Monsanto Co.
Packerland-Plainwell Inc.
Smurfit-Stone Container Corp.
Rohm and Haas
Texas Instruments Inc.
Washington Group International
2005
Amphenol Assemble Tech Florida
Calpine Corp.
Delta Air Lines Inc.
Fort Dearborn Co.
Frito-Lay
ISP Columbus
Keystone Wood Specialties Inc.
Kinetic Systems Inc.
Marathon Petroleum Co. LLC
Springs Window Fashions
Union Pacific Railroad
Westinghouse Savannah River Co.
2006
EnPro Industries
Fluor Corp.
Koch-Glitsch
Noble Drilling Services Inc.
OFG Jasper Cherry Street
Oregon Steel Mills, Portland Steel Works
Pacific Northwest National Laboratory
Precision Components International
Rust Contractors Inc.
Walbridge Aldinger Co.
2007
BWXT Pantex
CH2M Hill
E.J. Ajax & Sons
Kroger Manufacturing
Louisiana-Pacific Corp.
M.B. Herzog Electric Inc.
Parker Drilling Co.
Rea Magnet Wire
Southern Ohio Medical Center
W.W. Grainger Inc.
