Energy engineering and contractor companies

Skanska AB () is a multinational construction and development company based in Sweden. It was established in 1887 as a concrete product manufacturer.

Bechtel Corporation () is an American engineering, procurement, construction (EPC) and project management company founded in San Francisco, California in 1898. It is headquartered in Reston, Virginia, in the Washington, DC, metropolitan area. , the Engineering News-Record ranked Bechtel as the second largest construction company in the United States, following Turner Construction. Bechtel has over 50,000 employees as of May 2025.

Saipem S.p.A. (Società Azionaria Italiana Perforazioni E Montaggi lit. Drilling and Assembly Italian Public Limited Company) is an Italian multinational oilfield services company and one of the largest in the world. Until 2016 it was a subsidiary of Italian oil and gas supermajor Eni, which retains approximately 30% of Saipem's shares.

thumb|Greenway Plaza, the location of Transocean's [[Houston offices]]

American engineering, procurement, and construction company.

Technip S.A. was a company that carried out project management, engineering and construction for the energy industry; in 2017 it completed a merger with FMC Technologies to form TechnipFMC. Its headquarters were in the 16th arrondissement of Paris. It has about 38,000 employees and operates in 48 countries.

global group of companies selling systems and services to the offshore oil and gas industry

offshore engineering, construction, and services company based in the United Kingdom

engineering company

Australian public company

British multinational engineering and consulting business

company

International engineering contractor and industrial company headquartered in Athens, Greece

DeepOcean is an Oslo, Norway - based company which provides subsea services to the global offshore industries such as Inspection Maintenance and Repair (IMR), Subsea Construction, Cable Lay, and Subsea Trenching. Its 1,537 employees project manage and operate a fleet of Vessels, ROV's and subsea Trenchers.

OneSubsea is a SLB company, headquartered in Oslo, Norway and Houston, Texas, United States. The company is a subsea supplier for the subsea oil and gas market.