Waste Disposal Services
- Ballast Nedam Groep
- British Aerospace Co. (BAC)
- Saudi Petrochemical Co. (SADAF)
- National Chemical Fertilizer Co.
- Saudi Arabian Oil Co. (ARAMCO)
- US Army
- British Army
- Saudi Aramco Mobil Refinery (SAMREF)
- Fluor Arabia (YANPET Expansion)
- King Fahd Causeway Authority
- National Methanol Co.
- Fibertech
- Saudi Chevron Co.
- Saudi Arabian Bechtel Co. (Gazlan PP)
Catalyst Services
- Saudi Iron & Steel Co. (HADEED)
- Qatar Petrochemical Co. (QAPCO)
- Saudi Arabian Oil Co. (Saudi Aramco)
- SABIC (SAFCO Dammam)
- Saudi Aramco (Ras Tanura Refinery)
- GASCO (Habshan, UAE)
- SABIC Services Ltd (Ibn Al-Baytar)
- Arabian Petrochemical Co. (PETROKEMYA)
- Al-Jubail Petrochemical Co. (KEMYA)
- Qatar Fertilizer Co. (QAFCO, Qatar)
- Descon Engineering Co. (GASCO Ruwais, UAE)
- FERTIL Ruwais (UAE)
- Saudi Arabian Fertilizer Co. (SAFCO Dammam)
- AYTB (National Industrial Gas Plant)
- Saudi Aramco (Ju’aimah Gas Plant)
- National Oil Distribution Co. (NODCO Qatar)
- General Fertilizer Co. (Syria)
- Gulf Petrochemical Industries Co. (GPIC Bahrain)
- National Methanol Co. (IBN SINA)
- Jubail Fertilizer Co. (SAMAD)
- Descon Engineering Co. (ADNOC Ruwais, UAE)
Industrial Services
- Saudi Iron & Steel Co. (HADEED)
- SABIC Services Ltd.
- Saudi Arabian Oil Co. (Saudi Aramco)
- Halliburton Energy Services
- Dowell Schlumberger Co.
- EXEL
- Pipe & Well Services
- SABIC (SAFCO III Jubail)
- MARAFIQ (Yanbu Power Plant)
- Arabian Petrochemical Co. (PETROKEMYA)
- A.F. Al-Qahtani
- Pool Arabia
- Saudi Bin Ladin
- Royal Commission of Yanbu (Power Plant)
- S.W.C.C.
- Saudi Aramco
- Gulf Petrochemical Industries Co. (GPIC Bahrain)
- VETCO
- National Methanol Co. (IBN SINA)
- Saudi Petrochemical Co. (SADAF)
- ANABEEB
- NADRICO
