- ABB Automation
- Abu Dhabi Distribution Company (ADDC)
- Abu Dhabi Investment Authority (ADIA)
- Abu Dhabi Transmission and Dispatch (TRANSCO)
- Abu Dhabi Water & Electricity Authority (ADWEA)
- Ajman Investment Management Services (AIMS)
- Al Ain Distribution Company (AADC)
- Al Asab Est. General Transporting and Contracting
- Al Dhafra Petroleum Operation Co. Ltd.
- Al Mirfa Power Company (AMPC)
- Al Moghera
- Al Rees Oil & Gas Services
- Arab Potash Company
- Atlantis
- AVA S.p.A.
- Badreddin
- Bahrain Petroleum Co.
- Bellelli Engineering S.p.A.
- China Petroleum Engineering & Construction Corporation
- DAEWOO Engineering and Construction Co. Ltd.
- Descon Engineering Limited
- Dresser-Rand
- Dry Docks World
- Dubai Electricity & Water Authority (DEWA)
- Dubai Aluminium (DUBAL)
- ELSAG Bailey
- EMARAT Oil
- EMOCHEM
- Fujairah Asia Power Company
- Fujairah Municipality
- General Headquarters – Police UAE GHQ
- Gulf Contractors
- Kuwait Oil Co.
- Kuwait Petroleum
- Oil & Gas Development Company Limited
- National Corporation for Tourism & Hotels
- Occidental Petroleum Corporation (OXY)
- Oren Hydrocarbon
- Petrochem Performance Chemicals
- Petroleum Institute
- Safelift LLC
- SAMSUNG Engineering
- Saudi Aramco Thru Arabian Establishment for Trade and Shipping
- Shuweihat Asia power company (SAPCO)
- SIEMENS
- Super Power Technology (SPT)
- Tanajib Petroleum Services Est
- TARGET Engineering Construction Company
- TAWEELAH Asia Power Company
- Umm Al Quwain Municipality
- Yemen Petroleum