- American Airlines
- American College of Healthcare Executives
- Chubb Insurance
- CITGO
- Clark Construction
- Coca-Cola
- Exxon Mobile
- Harris Corporation
- Home Depot
- Honeywell
- Pacific Corporation
- Phillip-Morris
- PCL Construction
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- Pratt and Whitney
- Price-Waterhouse
- Proctor and Gamble
- Sara Lee
- Shell Oil
- Turner Construction
- U.S. Army Corps of Engineers
- U.S. Marines
- U.S. Postal Service
- Verizon
- Weyerhauser
- Zachary Construction
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