Company lists · Data refreshed September 2026

Top 25 Oil and gas processing plant contractors worldwide

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

Compiled by the RevenueBase Data Team Data refreshed Sep 17, 2026 8,328 companies tracked

RevenueBase identified 8,328 oil and gas processing plant contractors worldwide as of September 2026 and tracks 597,707 professional contacts across them, including 104,239 with verified work emails and 0 with mobile numbers. The United States is the largest market and Tehran the largest hub.

This list covers oil and gas processing plant contractors 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 processing plant contractors 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

8,328Companies

597,707Contacts tracked

104,239Verified emails

0Mobile numbers

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The 25 largest oil and gas processing plant contractors worldwide

Ranked by team size

Top 25 of 8,328 oil and gas processing plant contractors 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 processing plant contractors: 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	Indirect evidence	Milan, ItalyHQ checked Sep 17, 2026	10001+	34,095 contacts →
	Indirect 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	Amec Foster Wheeler	Indirect evidence	Aberdeen, United KingdomHQ checked Sep 17, 2026	10001+	14,368 contacts →
	Indirect evidence “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.” Source: RevenueBase Database · checked Sep 17, 2026
5	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
6	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
7	Turner Industries	Indirect evidence	Baton Rouge, LA, United StatesHQ checked Sep 17, 2026	10001+	8,018 contacts →
	Indirect evidence “Turner Industries provides a single solution in heavy industrial construction, maintenance, turnaround, pipe and module fabrication, equipment, rigging and specialized…” Source: RevenueBase Database · checked Sep 17, 2026
8	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
9	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
10	Nmdc Energy	Indirect evidence	Abu Dhabi, United Arab EmiratesHQ checked Sep 17, 2026	10001+	6,786 contacts →
	Indirect evidence “Established in 1973, NMDC Energy (formerly NPCC) is a leading EPC company working in the energy sector.” Source: RevenueBase Database · checked Sep 17, 2026
11	Petrojet	Indirect evidence	Cairo, EgyptHQ checked Sep 17, 2026	10001+	6,535 contacts →
	Indirect evidence “The Petroleum Projects and Technical Consultations Company PETROJET is the largest state-owned joint-stock company in the Egyptian construction market established in 1975 as one…” Source: RevenueBase Database · checked Sep 17, 2026
12	Descon Engineering Limited	Indirect evidence	PakistanHQ checked Sep 17, 2026	n/a	6,099 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 17, 2026
13	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
14	Nesma & Partners	Indirect evidence	Khobar, Saudi ArabiaHQ checked Sep 17, 2026	10001+	5,767 contacts →
	Indirect evidence “Nesma & Partners group is the leading provider of integrated project solutions in the Kingdom of Saudi Arabia.” Source: RevenueBase Database · checked Sep 17, 2026
15	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
16	Monadelphous	Indirect evidence	Perth, AustraliaHQ checked Sep 17, 2026	5,001-10,000	4,996 contacts →
	Indirect evidence “Monadelphous is a leading Australian ASX-200 engineering group providing construction, maintenance and industrial services to the resources, energy and infrastructure sectors.” Source: RevenueBase Database · checked Sep 17, 2026
17	Bonatti	Partial evidence	Parma, United StatesHQ checked Sep 17, 2026	5,001-10,000	4,895 contacts →
	Partial evidence “Bonatti is an International Contractor providing services to energy industry with over 75 years of experience.” Source: RevenueBase Database · checked Sep 17, 2026
18	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
19	Megha Engineering & Infrastructures LTD	Partial evidence	Hyderabad, IndiaHQ checked Sep 17, 2026	n/a	3,506 contacts →
	Partial evidence “EPC Contractor in Irrigation, Water, Hydrocarbon and Power sectors.” Source: RevenueBase Database · checked Sep 17, 2026
20	Ortec Group	Indirect evidence	Aix-en-provence, FranceHQ checked Sep 17, 2026	10001+	3,436 contacts →
	Indirect evidence “En conjuguant depuis sa création audace et rigueur, le groupe Ortec est devenu aujourd’hui un des leaders des services à l’industrie, l’énergie et l’environnement.” Source: RevenueBase Database · checked Sep 17, 2026
21	ENPPI	Strong evidence	Nasr City 1, United StatesHQ checked Sep 17, 2026	1,001-5,000	3,370 contacts →
	Strong evidence “Enppi is globally recognized as a major engineering, EPC main contractor, and management contractor, with decades of experience in onshore and offshore projects in the oil and…” Source: RevenueBase Database · checked Sep 17, 2026
22	UTC Engenharia	Strong evidence	São Paulo, BrazilHQ checked Sep 17, 2026	10001+	3,176 contacts →
	Strong evidence “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…” Source: RevenueBase Database · checked Sep 17, 2026
23	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
24	Murphy	Indirect evidence	London, United KingdomHQ checked Sep 17, 2026	1,001-5,000	3,095 contacts →
	Indirect 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
25	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

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 processing plant contractors. 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 processing plant contractors.
Partial evidence: Its own public description names part of oil and gas processing plant contractors, 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 processing plant contractors. 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 8,328 oil and gas processing plant contractors worldwide

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Oil and gas processing plant contractors worldwide at a glance

As of Sep 17, 2026

17.4%Verified-email coverage

71.8Average contacts per company

11-50Median size (employees)

3.7%Largest-city concentration · Tehran

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

1,613

11-50

2,838

51-200

2,062

201-500

924

501-1,000

380

1,001-5,000

366

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 processing plant contractors, 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: 41 countries, largest first: the United States, India, Nigeria, Canada, the United Arab Emirates, Iran, Italy, Saudi Arabia, the United Kingdom, Türkiye and 31 more. Country and city lists for oil and gas processing plant contractors are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “oil and gas processing plant contractors”. 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 processing plant contractors), 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 processing plant contractors, 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, 104,239 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 processing plant contractors by location

56 lists · largest first

Every Oil and gas processing plant 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 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 processing plant contractors, 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 processing plant contractors are there worldwide?

RevenueBase identified 8,328 oil and gas processing plant contractors 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 processing plant contractors?

The United States leads with 1,708 companies, followed by India (601) and Nigeria (576). Every oil and gas processing plant contractors list by country and city is linked on this page.

Which city has the most oil and gas processing plant contractors?

Tehran leads with 305 headquartered companies, followed by Houston (214) and Port Harcourt (173).

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 104,239 verified decision-maker contacts tracked across these 8,328 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.