- Alsthom Exports, Paris
- Australian Indian Resources Pvt. Limited
- Bechtel Overseas Corporation, USA
- Bell Canada, Ontario, Canada
- Cairn Energy PLC
- Enron Engineering & Construction Company
- ERM Lahmeyar International Gm BH (KSPCB)
- G.I.S. 2000 s.r.l., Italy
- HSS Integrated, Malaysia
- PBS&J, Florida, USA
- Raytheon Engineers and Constructors, USA
- Scot Wilson Kirpatrick
- Shell
- SNC Lavalin Inc., Canada
- Toronto Region Conservation Authority, Canada
- Tractebel Engineering
- Tri-Wall (Asia) Pte Limited, Singapore
- Libya (Tripoli)
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