| Al Jaber Trading & Contg. Cp. WLL |
| Al Khayyat Contracting & Trading |
| Al Mamoon Oilfield & Industrial Supplies Co. |
| Al Sabbah Trading & Contracting Company WLL |
| Anabeeb |
| Bin Omran Group |
| Construction Development Company W.L.L |
| Doha Petroleum Construction Co. Ltd. |
| Energoporojekt Entel |
| Galfar Al Misnad Engineering & Contracting |
| Gulf Contracting Co. W.L.L |
| Middle East & North African Projects (MENA) |
| Mott MacDonald Limited – Qatar |
| Noble Denton & Associates |
| Penspen International Limited |
| Qatar Kentz W.L.L |
| Qatari Arabian Construction Co. W.L.L |
| REDCO Construction – Almana |
| Sitaf Qatar W.L.L |
| Total Safety Us Inc. (Qatar Branch) |
| United Electronics Co. L.L.C |