- Saudi Engineering Group International [SEGI]
- Worley Parsons Arabia Ltd
- Petrocon Arabia Ltd.
- Middle East Battery Company [MEBCO]
- Snamprogetti Saudi Arabia Ltd.
- Saudi Aramco Projects
- Saudi Electricity Company [SEC]
- Hydratight [Tig Tesco International Ltd.]
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- Saihati Construction Company [SAICON]
- Al Qurrayah Group
- Zamil Group
- Sofcon
- Lumus Alireza
- Saihati Group Of Companies
- Saihati Files Factory
- Sepam Specialist Company
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- Nico International
- Topaz Engineering
- Topaz Marine
- Adyard Abudhabi
- Vision World Engineering
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- Dart Automation
- Lamprell Sharjah Ltd.
- Schemes Engineering
- The National Company
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- Kharafi National Company
- Al Bahar Jacorossi Engg. & Contg.
- Integrated Services Company (ISCO)
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- 3B Engineering & Contracting
- Mustafa Karam Trading & Contracting Co., Ahmadi
- Naser M Al-Baddah Trading & Contg., Ahmadi
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- Sepam Specialist Company
- Global Professional Engineers
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- Gulf Strategic Partners
- Technosteel Engineering
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- Tatweer Petroleum
- Aradous Engineering Company
- Advanced Modular Power Systems
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- Husseini Contractors W.L.L.
- Mohammed Jalal & Sons
- Kontra Interior Designers & Contractors
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