- A+A Group of Companies - Civil and industrial construction is the main direction of its work. Provides different types of services.
- ADO-G Group of Companies - Provides a fully integrated system for production, planning, architecture, design, engineering, estimation, construction, etc.
- ASPI Consulting Engineers, Inc. - An international firm that provides exceptional engineering and consultant services for clients around the globe.
- AZFEN - Performing first-class construction and engineering work for oil companies.
- Caspian Wireline Services, Ltd. - Providing wireline logging and perforating services to oil production companies in Azerbaijan, Kazakhstan, and Georgia.
- Construction Repair Company - Provides diversified construction services for heavy/civil construction, commercial, industrial, and institutional projects.
- Encotec - A general engineering company providing multi discipline design engineering services, consulting & project management.
- Kiber Ltd - Offers Solutions in industrial and civil engineering, design work on developing of machine-building and oil industry equipment.
- Mapet Mechanical - Accomplishes numerous construction contracts for mechanical installations and related projects.
- Narmin - The leader of producing equipment for ecology controlling, portal gas analyzer.
- Nasiraddin Tusi Ltd. - Delivers cost-effective and high-quality turnkey solutions in project management in the international oil and gas industry.
- Rapid Solutions - One of the premier service & related product suppliers in the Caspian region to the Oil & Gas, Industrial & Commercial markets.
- SDL Denholm - Denholm Oilfield Services is focussed on providing support services to the oil, gas and petrochemical industry around the world.
- Siemens in Azerbaijan - The company has launched a number of projects primarily in the Power, Medical, and Transportation segments.
- TelcoPlus - Provides high quality engineering and technical consulting services to all customers.
- Weir Oil & Gas - Provides superior solutions to Oil & Gas Companies in upstream, production, transportation, refining and related industries.