Company lists · Data refreshed October 2026

Top 25 Oil and gas contractors worldwide

Name: Oil and gas contractors worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Oct 19, 2026 17,442 companies tracked

RevenueBase identified 17,442 company matches for oil and gas contractors worldwide as of October 2026 and tracks 973,027 professional contacts across them, including 142,594 with verified work emails. The United States is the largest market and Tehran the largest hub.

This list covers company matches for oil and gas contractors worldwide, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed October 19, 2026. Country and city lists for oil and gas contractors follow the table.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list RevenueBase SmartSearch · Exact Recorded Oct 19, 2026 How this list was built

17,442Companies

973,027Contacts tracked

142,594Verified emails

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The 25 largest oil and gas contractors worldwide

Ranked by team size

Top 25 of 17,442 company matches for oil and gas contractors worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 19, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Saipem	Exact match	Milan, ItalyHQ recorded Oct 19, 2026	10001+	35,555 contacts →
	Exact match “Saipem is a global leader in the engineering and construction of major projects for the energy and infrastructure sectors, both offshore and onshore.” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
2	Mcdermott International, LTD	Exact match	Houston, TX, United StatesHQ recorded Oct 19, 2026	10001+	21,087 contacts →
	Exact match “McDermott is a premier provider of engineering and construction solutions to the energy industry.” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
3	Aker Solutions	Exact match	Fornebu, NorwayHQ recorded Oct 19, 2026	10001+	16,152 contacts →
	Exact match “Aker Solutions is a global engineering and technology company known for delivering complex energy projects with trusted quality and predictable results.” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
4	Amec Foster Wheeler	Exact match	Aberdeen, United KingdomHQ recorded Oct 19, 2026	10001+	15,181 contacts →
	Exact match “Wood Group has combined with Amec Foster Wheeler to form a new global leader in the delivery of project, engineering and technical services to energy and industrial markets.” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
5	Orascom Construction PLC	Exact match	Cairo, EgyptHQ recorded Oct 19, 2026	10001+	13,992 contacts →
	Exact match “Orascom Construction PLC is a leading global engineering and construction contractor primarily focused on infrastructure, industrial and high-end commercial projects in the Middle…” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
6	Petrofac	Exact match	London, United KingdomHQ recorded Oct 19, 2026	5,001-10,000	11,863 contacts →
	Exact match “We are a leading international service provider to the energy industry, with a diverse client portfolio including many of the world’s leading energy companies.” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
7	Tecnicas Reunidas	Exact match	Madrid, SpainHQ recorded Oct 19, 2026	10001+	11,378 contacts →
	Exact match “TR is an international general contractor engaged in the engineering and construction of industrial facilities in the fields of-Oil & Gas -Refining & Petrochemical -Power…” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
8	Samsung E&a	Exact match	Gangdong-gu, South KoreaHQ recorded Oct 19, 2026	5,001-10,000	7,325 contacts →
	Exact match “SAMSUNG E&A is one of the world’s leading engineering, procurement, construction and project management (EPC & PM) companies.” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
9	Nmdc Energy	Exact match	Abu Dhabi, United Arab EmiratesHQ recorded Oct 19, 2026	10001+	7,167 contacts →
	Exact match “Established in 1973, NMDC Energy (formerly NPCC) is a leading EPC company working in the energy sector.” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
10	Zachry Group	Exact match	San Antonio, TX, United StatesHQ recorded Oct 19, 2026	10001+	7,053 contacts →
	Exact match “Zachry Group is North America's pacesetter in turnkey engineering, construction, maintenance, turnaround and fabrication services to the energy, chemicals, power, manufacturing…” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
11	Lamprell	Exact match	Sharjah, United Arab EmiratesHQ recorded Oct 19, 2026	5,001-10,000	6,375 contacts →
	Exact match “With 50 years of experience, Lamprell is a key player in the global offshore wind and oil & gas markets, delivering high-quality, complex energy infrastructure projects.” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
12	Nesma & Partners	Exact match	Khobar, Saudi ArabiaHQ recorded Oct 19, 2026	10001+	5,837 contacts →
	Exact match “Nesma & Partners group is the leading provider of integrated project solutions in the Kingdom of Saudi Arabia.” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
13	GS E&c	Exact match	Seoul, South KoreaHQ recorded Oct 19, 2026	5,001-10,000	5,758 contacts →
	Exact match “GS E&C is Korea`s representative global contractor leveraging its experience in Civil Engineering, Building, Oil & Gas, Power Plants and Renewable Energy to continually provide…” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
14	Monadelphous	Exact match	Perth, AustraliaHQ recorded Oct 19, 2026	5,001-10,000	5,398 contacts →
	Exact match “Monadelphous is a leading Australian ASX-200 engineering group providing construction, maintenance and industrial services to the resources, energy and infrastructure sectors.” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
15	Bonatti	Exact match	Parma, United StatesHQ recorded Oct 19, 2026	5,001-10,000	5,233 contacts →
	Exact match “Bonatti is an International Contractor providing services to energy industry with over 75 years of experience.” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
16	Aesa A-Evangelista SA	Exact match	Canning, IndiaHQ recorded Oct 19, 2026	5,001-10,000	5,219 contacts →
	Exact match “Since 1948 we specialize in projects for the energy industry.” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
17	Seatrium	Exact match	United StatesHQ recorded Oct 19, 2026	10001+	4,979 contacts →
	Exact match “A Premier Global Player with Deep Engineering Expertise in the offshore, marine and energy industries Engineering our Future Together.” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
18	Target Engineering Construction CO LLC	Exact match	Abu Dhabi, United Arab EmiratesHQ recorded Oct 19, 2026	5,001-10,000	4,647 contacts →
	Exact match “Target Engineering Construction Company was established in 1975 and operates through its specialized divisions – Power, Oil and Gas Division and Civil & Marine Division.” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
19	Bilfinger	Exact match	Mannheim, GermanyHQ recorded Oct 19, 2026	10001+	4,268 contacts →
	Exact match “Bilfinger is an international industrial services provider with a vision to be the No.” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
20	PT Elnusa TBK	Exact match	Jakarta Selatan, IndonesiaHQ recorded Oct 19, 2026	1,001-5,000	4,167 contacts →
	Exact match “We are the one and only national company that possesses combined competencies in oil & gas services: seismic, drilling and oilfield.” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
21	Galfar Engineering & Contracting Saog	Exact match	Muscat, OmanHQ recorded Oct 19, 2026	10001+	4,138 contacts →
	Exact match “Galfar Engineering & Contracting SAOG is one of the largest, multi-disciplined engineering, contracting and construction company in the Sultanate of Oman.” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
22	CBSI	Exact match	Volta Redonda, BrazilHQ recorded Oct 19, 2026	10001+	3,994 contacts →
	Exact match “Somos a CBSI!” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
23	UTC Engenharia	Exact match	São Paulo, BrazilHQ recorded Oct 19, 2026	10001+	3,755 contacts →
	Exact match “The Company operates in sundry markets, taking the lead in such sectors as oil & gas production and processing, petrochemicals, power generation, steel production, paper & pulp…” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
24	S&b	Exact match	Houston, TX, United StatesHQ recorded Oct 19, 2026	5,001-10,000	3,615 contacts →
	Exact match “S&B is an engineer and constructor that designs and builds some of the largest and most complex industrial facilities in the world.” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
25	Team, INC	Exact match	Sugar Land, TX, United StatesHQ recorded Oct 19, 2026	5,001-10,000	3,530 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “oil and gas contractors”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 17,442 oil and gas contractors worldwide

See the full list, filter by size, metro and specialty, and access 142,594 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Oil and gas contractors worldwide at a glance

As of Oct 19, 2026

14.7%Verified-email coverage

55.8Average contacts per company

11-50Median size (employees)

2.2%Largest-city concentration · Tehran

Oct 19, 2026Page data refreshed

Companies by employee count

1-10

4,127

11-50

5,964

51-200

4,045

201-500

1,637

501-1,000

711

1,001-5,000

665

5,001-10,000

136

10001+

104

Email recency is reported on each country list linked below.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
Coverage: Every country. Country and city lists for oil and gas contractors are linked below.
What qualifies: Company records worldwide whose business descriptions match “oil and gas contractors” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every displayed company carries at least one verified work email. RevenueBase tracks 142,594 professional contacts with verified work emails across the full matched dataset. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on October 19, 2026. Lists refresh periodically as the graph is re-checked.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Oil and gas contractors by location

91 lists · largest first

Every Oil and gas contractors list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

Cities

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “oil and gas contractors”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many oil and gas contractors are there worldwide?

RevenueBase identified 17,442 company matches for oil and gas contractors worldwide as of October 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Saipem tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which country has the most oil and gas contractors?

The United States leads with 2,420 companies, followed by Nigeria (989) and Brazil (890). Every oil and gas contractors list by country and city is linked on this page.

Which city has the most oil and gas contractors?

Tehran leads with 385 company records, followed by Houston (331) and Port Harcourt (273).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 142,594 professional contacts with verified work emails tracked across these 17,442 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on October 19, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase SmartSearch, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.