| Al Rashid Trading & Contracting |
| Al Saad General Contracting |
| Al-Fouad Group Co. |
| Al-Osais Group |
| Al-Saad General Contracting Company Limited |
| Arabian Pipeline & Services Co. Ltd.- Anabeeb |
| Arabian Soil Contractors Ltd. |
| Askar Engineering |
| Azmi Abdulhabi & A. Al Moaibed Consulting Engineering Co. |
| BILFAL Heavy Industries Limited |
| Daelim Saudi Arabia Co. Ltd. |
| Drake & Scull International |
| Eastern Trading & Contracting Company |
| El Seif Engineering Contracting |
| Energy Company Limited (TAACA) |
| Fluor Arabia Ltd. |
| Gizza Arabia |
| Huta Hegerfield Saudi Ltd. |
| Kentz Engineers & Contractors |
| Mace Saudi Arabia Co. Ltd. |
| Mazroai Engineering- Consulting Engineers |
| Mcdermott Arabia Company Ltd. |
| National Industrialization Co. – (NIC) |
| Oil & Gas Company Limited |
| Olayan Descon Industrial Company Limited |
| Petro-Insfrastructure Engineering Consultants Co. |
| Poyry Energe AG |
| Saudi Arabian Amiantit Co. – (SAAC) |
| Saudi Arabian Bechtel Co. (SABCO) |
| Saudi Binladin Group |
| Saudi Diesel Equipment Co. Ltd. |
| Saudi Services for Electro Mechanics Works |
| Saudi Trading & Research Co., Ltd. |
| WorleyParsons Engineering Consulting Company |
| Xenel Industries Ltd. |