- AG Processing
- Air Products & Chemicals
- Alstom Power
- Arkema
- Ashland Chemical
- BASF
- Bechtel
- Black & Veatch
- Bunge
- Burns & McDonnell
- Cargill
- Chemours
- Conoco
- Crown Iron Works
- E.I. Dupont
- Evonik Industries
- Fluor Daniel
- Foster Wheeler
- General Electric
- Georgia Pacific
- Hargrove Engineers + Constructors
- International Paper
- Jacobs Engineering
- Kadant
- Kellogg-Brown and Root
- Lucite International
- Riceland Foods
- Technip
- The Shaw Group
- Veolia Water, HPD Division
- Westlake Monomers
- Weyerhaeuser Co.
- Witco Chemical
- Wood Group