Clients: Energy and Chemical
- Alberta Energy
- Alliant Energy
- Advanced Energy
- Alabama Gas
- Alabama Power
- Alaska Petroleum Contractors
- Amoco
- ARCO
- Ashland Chemical Company
- Atmos Energy
- BASF
- BP Amoco
- British Petroleum
- Brunei Shell
- Caltex
- Celanese Chemical
- Chevron Canada
- Chevron Chemical
- Chevron Products
- Chevron Texaco
- Chevron USA Production
- Citgo
- ConocoPhillips
- Consumers Energy
- Consumers Gas
- Consumers Power
- Direct Energy
- Dow Chemical
- Duke Energy
- DuPont
- Energy Group Williams
- Ensco Offshore
- Entergy Services
- Estevan Coal
- Exelon
- Exxon Chemical
- Exxon Coal & Minerals
- ExxonMobil
- Halliburton
- Hunt Refining Company
- Imperial Oil Resources
- Intesa
- Kerr-McGee
- Louisiana-Pacific
- Lubrizol
- Marathon Oil
- Merisol
- MidAmerican Energy
- Mobil Chemical
- Monsanto
- National Oilwell
- Nova Chemicals
- Pacific Gas
- Peco Energy
- Pemex Exploracion y Produccion
- Petroleos Mexicanos
- Petroliam Nasional Berhad
- Phillips Petroleum
- Schlumberger Offshore Services
- Shell Canada
- Shell Chemical
- Shell Oil
- Solvay Chemical
- Sunoco
- TECO Energy
- Texaco
- Trans-Canada Pipeline
- Union Carbide
- Union Gas
- Zeon Chemicals
