Cambustion Ltd.
Fast emissions analysers—Automotive emissions consultancy, development and testing
Emisstar LLC
Testing services—Sustainable transportation—Advanced vehicle technology—Strategic advisory services—Incentive program guidance—Project management
FEV, Inc.
Diesel systems development from combustion through aftertreatment
ServoTech Engineering
Control systems for SCR catalysts and particulate filters—Urea dosing systems—Emission testing and R&D
Southwest Research Institute
Engine design—Diesel engine development—Fuels, lubricants, and emissions research and testing
- Aaqius & Aaqius
- Advanced Engine Technologies Corporation
- AEA Technology plc
- Andover Technology Partners
- Ansys Inc. (Fluent)
- Arcadis
- Automotive Consulting Group
- Automotive Industry Data
- AVL List GmbH
- Besecker Associates
- BMB Fuel Consulting Services
- BMT Fleet Technology
- Bradley, M.J., & Associates
- Capital Technology
- Combustion Engineering Lab
- Convergent Science
- Crown Engineering
- ECO LLC
- Ecopoint Inc.
- Ecotraffic ERD3 AB
- Emisstar
- Emissions Guru Inc.
- Engine Certification Online
- Engine, Fuel, and Emissions Engineering
- EngSim Corporation
- Environex Inc.
- EPR Consulting Services
- FEV
- FuelsandLubesConsulting, LLC
- Global Exhaust Technology A/S (Denmark)
- Harding ESE
- Heaney, Edelstein & Company (HECO)
- IAV Automotive Engineering
- Integer Research
- Integral Powertrain Ltd. (UK)
- Lester, George, Inc.
- LiquidPiston, Inc.
- Lotus Engineering
- MacDonald Consulting
- MARC-IV, LLC, Consulting
- McCullough Engineering
- Meszler Engineering Services
- NCM Underhuellsteknik AB
- Nisymco Inc.
- OceanAir Environmental
- Peeples Consulting Associates
- Polk, R.L. & Co.
- Power Systems Research
- Prodrive Limited (UK)
- Rhein Associates, Inc.
- Ricardo Group plc
- RMH Consulting
- Rotec Design
- Roush Industries
- Sierra Engineering Services
- Southern Research Institute (SRI)
- Superior Process Technologies
- Technology and Engineering Mgm
- Testing World.net
- TTM Andreas Mayer
- Unlimited Design International
- Valient Automotive Market Research
- Walsh, Michael P.
- WTZ Rosslau GmbH
- XRD Inc.