- ABB Ltd
- Emerson Electric Co.
- General Electric Company
- Honeywell International Inc.
- Rockwell Automation Inc.
- Schneider Electric SE
- Siemens AG
- Yokogawa Electric Corporation
- STORK
A Fluor Company
- Turbine Technology Services Corporation
- Energy Controls Technology Inc.
- PetroTech Oil & Gas Inc.
- HollySys Automation Technologies Ltd
- China Automation Group Limited
- Voith GmbH & Co. KGaA
- Woodward Inc.
- MAN SE
- Mitsubishi Electric Corporation Ltd
- Compressor Controls Corporation
- Solar Turbines Incorporated
- Ingersoll Rand Inc.