- Abu Dhabi Fund for Development, UAE
- Abu Dhabi Gas Industries Co (GASCO), U.A.E.
- Abu Dhabi Municipality, U.A.E.
- Abu Dhabi Ports Company (ADPC)
- ADNOC- Abu Dhabi National Oil Company, UAE
- Agip, Kazakhstan (Agip KCO)
- Agrium Inc. with ECHEM), EgyptM), Egypt
- Alexandria Port Authority, Egypt
- Arab Potash Co. Ltd., Jordan
- Council for Development and Reconstruction, Lebanon
- Cyprus Ports Authority
- Damietta International Port Company, Egypt
- Dubai Drydocks, U.A.E.
- Dubai Municipality, U.A.E.
- Dubai Ports Authority, UAE
- Dubai Supply Authority, U.A.E., U.A.E.
- DUBAL- Dubai Aluminium Company, U.A.E.
- Egyptian Electricity Authority
- Electricity Authority of Cyprus
- Emirates Aluminium (EMAL), U.A.E.
- General Electricity Company of Libya (GECOL)
- Libyan Maritime and Ports Authority
- MIDTAP-MIDOR, Egypt
- Ministry of Communications, Saudi Arabia
- Ministry of Irrigation, Egypt
- Ministry of Transport & Communications, Oman
- Ministry of Works and Agriculture, Bahrain
- Mobil Oil Company, Saudi Arabia
- National Water and Sanitation Authority, Yemen
- OBO (Bureau of Overseas Buildings Operations),US
- Oman-India Fertilizer Company, Oman
- Oman LNG L.L.C.
- Palm Island Developers (Nakheel), Dubai, UAE
- Port Said Port Authority, Egypt
- Public Utilities Board, Singapore
- Qatar Fuel Additives Company Ltd. (QAFAC)
- Qatar Liquified Gas Company Ltd.
- Qatar Petroleum
- Red Sea Ports Authority, Egypt
- Royal Commission of Jubail & Yanbu, Saudi Ar.
- Sabic Terminal Services (SabTank), Saudi Ar.
- Saline Water Conversion Corporation, Saudi Arabia(SWCC)
- Saudi Aramco
- Saudi Basic Industries Corporation (SABIC)
- Saudi Electricity Company
- Saudi Ports Authority
- Saudi Railroads Organization (SRO)
- Saudi Railway Company (SAR)
- Shell (Qatar GTL Ltd.), Qatar
- Shoaiba Water & Electricity Company, Saudi Ar.
- Suez Canal Container Terminal SAE
- Total (Qatofin Co. Ltd.), Qatar
- Works Department, Abu Dhabi, U.A.E.
- Yemen Ports Authority
- Zabeel Investment LLC
- National Company Aktau International Marine Trade Port (Aktau Port), Kazakhstan
- Alstom Power (ABB)
- Ansaldo Energia
- Arab Contractors
- Bechtel International Inc.
- Belleli
- Bin Laden Group
- Chiyoda,Japan
- Clough Engineering
- CCC
- Daewoo
- General Electric
- GTM
- Doosan (Hanjung), Korea
- Hochtief
- Hyundai
- Linde
- Mitsubishi Heavy Industries Ltd.
- Mitsui Engineering and Shipbuilding Co.
- Nippon Steel
- Petrojet
- Saipem
- Samsung
- Siemens
- Shell International
- Skanska
- Snamprogetti
- Taisei Corporation
- Techint
- Technip, France
- Technip, Italy
- Technodomiki
- Wimpey-Tarmac
- A. M. Al-Issa (Al Issa-Kuljian) Consulting Engineers, Saudi Arabia
- Abalkhail – SWECO, Saudi Arabia
- Allot & Lomax Consulting Engineers,U.K.
- Arabian Consulting Engineering Center, Saudi Arabia
- Arcadis Euro Consult in Association with Darwish Consulting Engineers, Cairo, Egypt
- Associated Consulting Engineers International, Dubai, U.A.E.
- Atkins & Partners Overseas, U.A.E.
- BCEOM, Paris, France
- Bechtel International, U. S. A., U.K.
- Berger II, Berger Sarl &Jordanou, Limassol, Cyprus
- Buro Happold Consulting Engineers, Saudi Arabia
- Cansult ,Canada
- CIMS Project Management Consultancy, Dubai, U.A.E.
- Consortium of Tractebel Gas Engg. and Enppi, Egypt
- Consulting Engineering Services L.L.C., Muscat, Oman
- Coode & Partners Royal Oak House,England
- COWI A/S, Denmark
- Dar Al-Handasah (Dar Consultants) Lebanon, U.K.
- Delta Marine Consultants B.V., Netherlands
- Electrowatt Ekono A.G., Switzerland
- ENERGO Engineering and Consulting, U.A.E
- Ewbank Preece Power and Water Ltd., U.K.
- Fichtner Gmbh & Co KG, Germany
- Sir Alexander Gibb & Partners, U.K.
- Halcrow Group, U.K.
- Hamza Associates, Egypt
- Han-Padron Associates, U.S.A.
- High Point Rendel, U.K.
- Inter Engineering (Holland), Hospitalia (W. Germany, Doxiadis Associates, Greece).
- International Hydraulic Overseas, Saudi Arabia
- Jacobs Engineering UK Limited
- Lahmeyer International of Germany
- Lockwood Greene International, U.S.A
- Maunsell Consultancy Services Ltd., Dubai
- Mott Macdonald, U.K.
- MWH Consultants PTE Ltd., Singapore
- Netherlands Engineering Consultants (NEDECO), Dubai, U.A.E.
- Posford Duvivier, U.K.
- Poyry, Zurich, Switzerland
- Royal Haskoning, Netherlands
- SAK Engineering Consultants, Saudi Arabia
- Saudi Consulting Services (SAUD CONSULT)
- Saudi Technical Geology and Engineering Consultants, Saudi Arabia
- Scott Wilson Kirkpatric & Co. Ltd., Dubai
- Shell Internationale Petroleum Maatschappij B.V.
- Soros Associates Inc., Chicago, USA
- Technital International General Engineering, Saudi Arabia
- The Louis Berger Group Inc. in J.V. with Canarail Consultants Inc. Systra S.A.and SCEC K & A , Saudi Arabia
- Weidleplan Consulting, W. Germany
- Zuhair Fayez & Associates, Saudi Arabia
