- Saudi Arabian Oil Company ( Saudi Aramco )
- Saudi Arabian Basic Industries Corporation ( SABIC )
- Royal Commission of Jubail&Yanbu
- Saudi Water Conversion Company
- Saudi Arabian Mining Company (MA’ADEN)
- Saudi Electricity Company
- Water Desalination Plants
- Cement Plants
- Saudi Telecommunications Company (STC)
- Transportation Sector
- Power Generation Sector
- Saudi Chevron Petrochemicals
- Aramco Sheel Refinery ( SASREF)
- Khafji Joint Operations(KJO)
- Petro Rabigh
- Saline Water Conversion Corporation (SWCC)
- Marafiq
- MAADIN
- Saudi International Petrochemical Company (SIPCHEM)
- Rabigh Refining & Petrochemical Company
- Haliburton
- Mitsubishi Hitachi Power Systems
- Emerson
- Mc Dermott
- King Fahad University of Petroleum & Minerals
- King Faisal University
- Daleel Petroleum Company
- CAT
- Jotun
- ECO
- Al Barghash
- Saudi International Company
- Arcelor Mittal
- McDormott
- Vallourec
- Dhurma Electricity Company
- Ministry of Information, Bahrain
- A Mojil Supply & Services
- Suedrohrbau Saudi Arabia Limited
- Honeywell
- Dar Al-Riyadh Holding Company Limited
- CDC Masdar