Company lists · Data refreshed September 2026

Top 25 Oil and gas infrastructure builders worldwide

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

Compiled by the RevenueBase Data Team Data refreshed Sep 17, 2026 6,904 companies tracked

RevenueBase identified 6,904 oil and gas infrastructure builders worldwide as of September 2026 and tracks 483,740 professional contacts across them, including 99,259 with verified work emails and 0 with mobile numbers. The United States is the largest market and Houston the largest hub.

This list covers oil and gas infrastructure builders worldwide, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 17, 2026. Country and city lists for oil and gas infrastructure builders follow the table.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, 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 HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 17, 2026 86% judged on-target in blind review

6,904Companies

483,740Contacts tracked

99,259Verified emails

0Mobile numbers

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The 25 largest oil and gas infrastructure builders worldwide

Ranked by team size

Top 25 of 6,904 oil and gas infrastructure builders worldwide, ranked by team size, largest first. Data refreshed Sep 17, 2026. RevenueBase Smart Search rates how each company's information relates to oil and gas infrastructure builders: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Saipem	Partial evidence	Milan, ItalyHQ checked Sep 17, 2026	10001+	34,095 contacts →
	Partial evidence “Saipem is a global leader in the engineering and construction of major projects for the energy and infrastructure sectors, both offshore and onshore.” Source: RevenueBase Database · checked Sep 17, 2026
2	Mcdermott International, LTD	Indirect evidence	Houston, TX, United StatesHQ checked Sep 17, 2026	10001+	20,135 contacts →
	Indirect evidence “McDermott is a premier provider of engineering and construction solutions to the energy industry.” Source: RevenueBase Database · checked Sep 17, 2026
3	Aker Solutions	Indirect evidence	Fornebu, NorwayHQ checked Sep 17, 2026	10001+	15,774 contacts →
	Indirect evidence “Aker Solutions is a global engineering and technology company known for delivering complex energy projects with trusted quality and predictable results.” Source: RevenueBase Database · checked Sep 17, 2026
4	Petrofac	Indirect evidence	London, United KingdomHQ checked Sep 17, 2026	5,001-10,000	13,261 contacts →
	Indirect evidence “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.” Source: RevenueBase Database · checked Sep 17, 2026
5	Tecnicas Reunidas	Strong evidence	Madrid, SpainHQ checked Sep 17, 2026	10001+	10,588 contacts →
	Strong evidence “TR is an international general contractor engaged in the engineering and construction of industrial facilities in the fields of-Oil & Gas -Refining & Petrochemical -Power…” Source: RevenueBase Database · checked Sep 17, 2026
6	Kinder Morgan, INC	Partial evidence	Houston, TX, United StatesHQ checked Sep 17, 2026	10001+	8,314 contacts →
	Partial evidence “Kinder Morgan, Inc.(NYSE: KMI) is one of the largest energy infrastructure companies in North America.” Source: RevenueBase Database · checked Sep 17, 2026
7	KENT	Indirect evidence	Dubai, United Arab EmiratesHQ checked Sep 17, 2026	10001+	7,045 contacts →
	Indirect evidence “We design, build and maintain the assets that power the world for today and make it future-ready for tomorrow.” Source: RevenueBase Database · checked Sep 17, 2026
8	Zachry Group	Indirect evidence	San Antonio, TX, United StatesHQ checked Sep 17, 2026	10001+	6,824 contacts →
	Indirect evidence “Zachry Group is North America's pacesetter in turnkey engineering, construction, maintenance, turnaround and fabrication services to the energy, chemicals, power, manufacturing…” Source: RevenueBase Database · checked Sep 17, 2026
9	Lamprell	Strong evidence	Sharjah, United Arab EmiratesHQ checked Sep 17, 2026	5,001-10,000	6,080 contacts →
	Strong evidence “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.” Source: RevenueBase Database · checked Sep 17, 2026
10	Nabors Industries	Indirect evidence	Houston, TX, United StatesHQ checked Sep 17, 2026	10001+	5,865 contacts →
	Indirect evidence “Nabors Industries is a leading provider of advanced technology for the energy industry.” Source: RevenueBase Database · checked Sep 17, 2026
11	Aesa A-Evangelista SA	Indirect evidence	Canning, IndiaHQ checked Sep 17, 2026	5,001-10,000	5,012 contacts →
	Indirect evidence “Since 1948 we specialize in projects for the energy industry.” Source: RevenueBase Database · checked Sep 17, 2026
12	Bonatti	Indirect evidence	Parma, United StatesHQ checked Sep 17, 2026	5,001-10,000	4,895 contacts →
	Indirect evidence “Bonatti is an International Contractor providing services to energy industry with over 75 years of experience.” Source: RevenueBase Database · checked Sep 17, 2026
13	ONEOK	Indirect evidence	Tulsa, OK, United StatesHQ checked Sep 17, 2026	5,001-10,000	4,443 contacts →
	Indirect evidence “At ONEOK (NYSE: OKE), we deliver energy products and services vital to an advancing world.” Source: RevenueBase Database · checked Sep 17, 2026
14	PT Elnusa TBK	Strong evidence	Jakarta Selatan, IndonesiaHQ checked Sep 17, 2026	1,001-5,000	3,932 contacts →
	Strong evidence “We are the one and only national company that possesses combined competencies in oil & gas services: seismic, drilling and oilfield.” Source: RevenueBase Database · checked Sep 17, 2026
15	AIBEL	Partial evidence	Stavanger, NorwayHQ checked Sep 17, 2026	1,001-5,000	3,879 contacts →
	Partial evidence “Aibel builds and maintains critical infrastructure for the energy sector and is one of the largest supplier companies in Norway.” Source: RevenueBase Database · checked Sep 17, 2026
16	S&b	Indirect evidence	Houston, TX, United StatesHQ checked Sep 17, 2026	5,001-10,000	3,510 contacts →
	Indirect evidence “S&B is an engineer and constructor that designs and builds some of the largest and most complex industrial facilities in the world.” Source: RevenueBase Database · checked Sep 17, 2026
17	Megha Engineering & Infrastructures LTD	Indirect evidence	Hyderabad, IndiaHQ checked Sep 17, 2026	n/a	3,506 contacts →
	Indirect evidence “EPC Contractor in Irrigation, Water, Hydrocarbon and Power sectors.” Source: RevenueBase Database · checked Sep 17, 2026
18	ADES	Strong evidence	Al Khobar, Saudi ArabiaHQ checked Sep 17, 2026	5,001-10,000	3,251 contacts →
	Strong evidence “ADES is a world-leading international provider of oil and gas drilling services.” Source: RevenueBase Database · checked Sep 17, 2026
19	Enerflex LTD	Strong evidence	Calgary, CanadaHQ checked Sep 17, 2026	1,001-5,000	3,207 contacts →
	Strong evidence “Enerflex is a premier integrated global provider of energy infrastructure and energy transition solutions, deploying natural gas, low-carbon, and treated water solutions – from…” Source: RevenueBase Database · checked Sep 17, 2026
20	Nbtc Group	Indirect evidence	Shuaiba Industrial, KuwaitHQ checked Sep 17, 2026	10001+	3,164 contacts →
	Indirect evidence “Being established in 1977, NBTC had flourished its self as a leading EPC contracting company through a combination of highly empowered attributes via entrepreneurial leadership…” Source: RevenueBase Database · checked Sep 17, 2026
21	Murphy	Partial evidence	London, United KingdomHQ checked Sep 17, 2026	1,001-5,000	3,095 contacts →
	Partial evidence “Murphy is a leading international, multi-disciplined engineering and construction company founded in 1951 that improves life by delivering world-class infrastructure.” Source: RevenueBase Database · checked Sep 17, 2026
22	Altrad	Strong evidence	Montpellier, FranceHQ checked Sep 17, 2026	10001+	3,056 contacts →
	Strong evidence “ALTRAD AT A GLANCE Altrad is a world leader in the provision of industrial services, generating high-added value solutions principally for the Energy, Power Generation, Oil & Gas…” Source: RevenueBase Database · checked Sep 17, 2026
23	Precision Drilling	Strong evidence	Calgary, AB, CanadaHQ checked Sep 17, 2026	5,001-10,000	2,471 contacts →
	Strong evidence “Precision is a leading provider of safe and High Performance, High-Value services to the oil and gas industry.” Source: RevenueBase Database · checked Sep 17, 2026
24	Estrutural	Indirect evidence	Porto Alegre, BrazilHQ checked Sep 17, 2026	1,001-5,000	2,461 contacts →
	Indirect evidence “Quem somos: Somos uma empresa nacional, com mais de 30 anos no segmento da construção, montagem e manutenção industrial.” Source: RevenueBase Database · checked Sep 17, 2026
25	Archer	Indirect evidence	Sandnes, NorwayHQ checked Sep 17, 2026	5,001-10,000	2,373 contacts →
	Indirect evidence “Archer is a company providing drilling and well services to the global energy industry.” Source: RevenueBase Database · checked Sep 17, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: oil and gas infrastructure builders. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names oil and gas infrastructure builders.
Partial evidence: Its own public description names part of oil and gas infrastructure builders, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name oil and gas infrastructure builders. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 6,904 oil and gas infrastructure builders worldwide

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Oil and gas infrastructure builders worldwide at a glance

As of Sep 17, 2026

20.5%Verified-email coverage

70.1Average contacts per company

11-50Median size (employees)

3.9%Largest-city concentration · Houston

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

1,395

11-50

2,354

51-200

1,701

201-500

758

501-1,000

301

1,001-5,000

278

5,001-10,000

10001+

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among oil and gas infrastructure builders, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
Coverage: 33 countries, largest first: the United States, Canada, Nigeria, India, the United Arab Emirates, Italy, Iran, the United Kingdom, Brazil, Germany and 23 more. Country and city lists for oil and gas infrastructure builders are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “oil and gas infrastructure builders”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names oil and gas infrastructure builders), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among oil and gas infrastructure builders, and records with no verified work email.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
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 listed company carries at least one verified work email, 99,259 across the full list. 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 September 17, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Oil and gas infrastructure builders by location

38 lists · largest first

Every Oil and gas infrastructure builders 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 Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names oil and gas infrastructure builders, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many oil and gas infrastructure builders are there worldwide?

RevenueBase identified 6,904 oil and gas infrastructure builders worldwide as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Saipem, headquartered in Milan, tops this list with the largest team on record.

Which country has the most oil and gas infrastructure builders?

The United States leads with 2,005 companies, followed by Canada (564) and Nigeria (410). Every oil and gas infrastructure builders list by country and city is linked on this page.

Which city has the most oil and gas infrastructure builders?

Houston leads with 267 headquartered companies, followed by Tehran (158) and Calgary (156).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 99,259 verified decision-maker contacts tracked across these 6,904 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 17, 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 Smart Search, 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.