• Allison Transmission
• BAE Systems
• Caterpillar
• Cummins Engine
• DaimlerChrysler
• Detroit Diesel Corporation
• Eaton
• Freightliner
• Honeywell International
• International Truck and Engine
• Mack Trucks
• NovaBUS
• Oshkosh Trucks
• PACCAR
• Volvo Trucks North America

Federal Government Partners

• U.S. Department of Energy (DOE)
• U.S. Department of Defense (DOD)
• U.S. Department of Transportation (DOT)
• U.S. Environmental Protection Agency (EPA)

In addition, the partnership draws on the technical expertise found in the participating national laboratories.

• Argonne National Laboratory
• Brookhaven National Laboratory
• Idaho National Laboratory
• Lawrence Berkeley National Laboratory
• Lawrence Livermore National Laboratory
• Los Alamos National Laboratory
• NASA Ames Research Center
• National Institute of Standards and Technology
• National Renewable Energy Laboratory
• Oak Ridge National Laboratory
• Pacific Northwest National Laboratory
• Sandia National Laboratories