Company lists · Data refreshed September 2026

Top 25 Refinery maintenance companies worldwide

Name: Refinery maintenance companies worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 3,607 companies tracked

RevenueBase identified 3,607 refinery maintenance companies worldwide as of September 2026 and tracks 134,209 professional contacts across them, including 18,238 with verified work emails. The United States is the largest market and Houston the largest hub.

This list covers refinery maintenance companies 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 21, 2026. Country and city lists for refinery maintenance companies 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 21, 2026 86% judged on-target in blind review

3,607Companies

134,209Contacts tracked

18,238Verified emails

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The 25 largest refinery maintenance companies worldwide

Ranked by team size

Top 25 of 3,607 refinery maintenance companies worldwide, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to refinery maintenance companies: 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	Estrutural	Indirect evidence	Porto Alegre, BrazilHQ checked Sep 21, 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 21, 2026
2	Qatar Engineering & Construction Company W.L.L	Partial evidence	Ras Laffan Industrial City (rlic), QatarHQ checked Sep 21, 2026	5,001-10,000	2,222 contacts →
	Partial evidence “Qatar Engineering & Construction Company (Qcon) is the leading National EPC & Maintenance Contractor in the Oil & Gas, Petrochemical, Fertilizer and Power industries.” Source: RevenueBase Database · checked Sep 21, 2026
3	EMC Egyptian Maintenance Company	Strong evidence	New Cairo, EgyptHQ checked Sep 21, 2026	5,001-10,000	2,003 contacts →
	Strong evidence “Since its foundation in 1997, EMC has become a well-known maintenance and modification service provider to major oil, gas and petrochemical companies, pipeline and refinery…” Source: RevenueBase Database · checked Sep 21, 2026
4	Brown & Root Industrial Services, LLC	Partial evidence	Baton Rouge, LA, United StatesHQ checked Sep 21, 2026	5,001-10,000	1,940 contacts →
	Partial evidence “Brown & Root Industrial Services offers the full range of industrial services – engineering, construction, maintenance, turnaround, and specialty (painting, scaffolding…” Source: RevenueBase Database · checked Sep 21, 2026
5	ELFE	Indirect evidence	Macaé, BrazilHQ checked Sep 21, 2026	1,001-5,000	1,898 contacts →
	Indirect evidence “No mercado há mais de duas décadas, a Axia é uma empresa nacional com atuação em operação e manutenção industrial.” Source: RevenueBase Database · checked Sep 21, 2026
6	Dietsmann	Partial evidence	Fontvieille, MonacoHQ checked Sep 21, 2026	5,001-10,000	1,843 contacts →
	Partial evidence “Dietsmann is the leading independent specialist in Operation & Maintenance services for continuous-production plant in the oil & gas and power industries with over 40 years of…” Source: RevenueBase Database · checked Sep 21, 2026
7	Groupe Ponticelli Frères	Indirect evidence	FranceHQ checked Sep 21, 2026	5,001-10,000	1,829 contacts →
	Indirect evidence “The Ponticelli Frères Group is one of the main European service suppliers to companies in the energy (oil and gas, nuclear, renewable energy), industrial (chemical, steelworks…” Source: RevenueBase Database · checked Sep 21, 2026
8	AYTB	Indirect evidence	Jubail Industrial City, Saudi ArabiaHQ checked Sep 21, 2026	5,001-10,000	1,812 contacts →
	Indirect evidence “AYTB had recognized the Saudi Dream 45 years ago when the Royal Commission for Jubail and Yanbu was set up with a vision to build a huge petrochemical industry to catapult Saudi…” Source: RevenueBase Database · checked Sep 21, 2026
9	Arabian Pipeline & Services Co. Ltd. Anabeeb	Indirect evidence	Dammam, Saudi ArabiaHQ checked Sep 21, 2026	5,001-10,000	1,587 contacts →
	Indirect evidence “ANABEEB is on a mission to become the best in the industry, together with our highly-dedicated workforce and global partners, we will deliver added value to our customers without…” Source: RevenueBase Database · checked Sep 21, 2026
10	Confipetrol S.A	Indirect evidence	Bogotá, ColombiaHQ checked Sep 21, 2026	1,001-5,000	1,580 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 21, 2026
11	Bilfinger North America	Partial evidence	The Woodlands, TX, United StatesHQ checked Sep 21, 2026	10001+	1,400 contacts →
	Partial evidence “As a leading construction and maintenance provider, Bilfinger aims to enhance the efficiency of assets and lower operational costs.” Source: RevenueBase Database · checked Sep 21, 2026
12	Universal Plant Services	Indirect evidence	Deer Park, TX, United StatesHQ checked Sep 21, 2026	501-1,000	1,371 contacts →
	Indirect evidence “Universal Plant Services (UPS) is the industry's foremost specialists in rotating and reciprocating equipment services.” Source: RevenueBase Database · checked Sep 21, 2026
13	Arabian Industries	Partial evidence	Alkhuwair, OmanHQ checked Sep 21, 2026	10001+	1,329 contacts →
	Partial evidence “We deliver engineered solutions for the oil, gas and industrialised sectors through our manufacturing, EPC Projects, Maintenance & Turnarounds, Logistics & Rig Moving and Support…” Source: RevenueBase Database · checked Sep 21, 2026
14	Egyptian Projects Operation And Maintenance Eprom	Strong evidence	Alexandria, EgyptHQ checked Sep 21, 2026	1,001-5,000	1,288 contacts →
	Strong evidence “EPROM has been actively involved in the maintenance and operation of major projects within or outside Egypt offering services for refineries, petrochemical plants, fertilizers…” Source: RevenueBase Database · checked Sep 21, 2026
15	Attock Refinery Limited	Partial evidence	Rawalpindi, PakistanHQ checked Sep 21, 2026	501-1,000	1,270 contacts →
	Partial evidence “Attock Refinery Limited (ARL) is the pioneer and pacesetter in Pakistan’s petroleum refining sector.” Source: RevenueBase Database · checked Sep 21, 2026
16	Nexxo S.A	Indirect evidence	Concón, ChileHQ checked Sep 21, 2026	1,001-5,000	1,225 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 21, 2026
17	Chennai Petroleum Corp. LTD Indian OIL	Indirect evidence	Chennai, IndiaHQ checked Sep 21, 2026	1,001-5,000	1,194 contacts →
	Indirect evidence “Chennai Petroleum Corporation Limited (CPCL) is a subsidiary of IOCL with world class refining technologies and a dominant presence in South India.” Source: RevenueBase Database · checked Sep 21, 2026
18	Cr3	Indirect evidence	Nikonpattana, ThailandHQ checked Sep 21, 2026	5,001-10,000	1,167 contacts →
	Indirect evidence “The CR3 Group is a leading provider of energy engineering solutions, catering to world-class customers in sectors such as energy production, chemical processing, power, renewables…” Source: RevenueBase Database · checked Sep 21, 2026
19	Strike	Partial evidence	Spring, TX, United StatesHQ checked Sep 21, 2026	1,001-5,000	1,155 contacts →
	Partial evidence “Strike safely and reliably delivers the specialized asset maintenance, construction, and contracting services that are business-critical to the energy, chemical, manufacturing…” Source: RevenueBase Database · checked Sep 21, 2026
20	National Refinery Limited	Partial evidence	Karachi, PakistanHQ checked Sep 21, 2026	1,001-5,000	1,097 contacts →
	Partial evidence “National Refinery Limited ( NRL ) was incorporated on August 19, 1963 as a public limited company.” Source: RevenueBase Database · checked Sep 21, 2026
21	Irmãos Passaúra S A	Indirect evidence	Curitiba, BrazilHQ checked Sep 21, 2026	1,001-5,000	1,075 contacts →
	Indirect evidence “Empresa de Montagem e Manutenção Industrial” Source: RevenueBase Database · checked Sep 21, 2026
22	Emdad Group	Indirect evidence	Abu Dhabi, United Arab EmiratesHQ checked Sep 21, 2026	1,001-5,000	1,027 contacts →
	Indirect evidence “Emdad LLC is a leading UAE-based service provider in the Oil & Gas sector, delivering integrated solutions that support upstream and downstream operations.” Source: RevenueBase Database · checked Sep 21, 2026
23	Sapref	Indirect evidence	Prospecton, South AfricaHQ checked Sep 21, 2026	501-1,000	944 contacts →
	Indirect evidence “SAPREF is a joint venture between Shell SA Refining and BP Southern Africa.” Source: RevenueBase Database · checked Sep 21, 2026
24	Novus Bolashak	Partial evidence	Atyrau, KazakhstanHQ checked Sep 21, 2026	1,001-5,000	938 contacts →
	Partial evidence “Novus Bolashak are a Full Service Systems Completion & Long Term Maintenance & Operations Contractor, including Procurement, Sub-contracting, Punch Identification & Clearing, Pre…” Source: RevenueBase Database · checked Sep 21, 2026
25	Sindus Andritz	Partial evidence	Porto Alegre, BrazilHQ checked Sep 21, 2026	1,001-5,000	932 contacts →
	Partial evidence “A Sindus ANDRITZ é uma empresa do Grupo ANDRITZ, onde atuam equipes das divisões Maintenance & Performance, ANDRITZ Automation e Metris Technology, além do suporte a outras…” Source: RevenueBase Database · checked Sep 21, 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: refinery maintenance companies. 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 refinery maintenance companies.
Partial evidence: Its own public description names part of refinery maintenance companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name refinery maintenance companies. 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 3,607 refinery maintenance companies worldwide

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Refinery maintenance companies worldwide at a glance

As of Sep 21, 2026

13.6%Verified-email coverage

37.2Average contacts per company

11-50Median size (employees)

1.9%Largest-city concentration · Houston

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

962

11-50

1,321

51-200

763

201-500

273

501-1,000

124

1,001-5,000

121

5,001-10,000

10001+

Email recency is reported on each country list linked below.

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 refinery maintenance companies, 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: Every country. Country and city lists for refinery maintenance companies are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “refinery maintenance companies”. 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 refinery maintenance companies), 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 refinery maintenance companies, 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, 18,238 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 21, 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.

Refinery maintenance companies by location

21 lists · largest first

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

Countries

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 refinery maintenance companies, 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 refinery maintenance companies are there worldwide?

RevenueBase identified 3,607 refinery maintenance companies 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?

Estrutural, headquartered in Porto Alegre, tops this list with the largest team on record.

Which country has the most refinery maintenance companies?

The United States leads with 517 companies, followed by Brazil (270) and India (132). Every refinery maintenance companies list by country and city is linked on this page.

Which city has the most refinery maintenance companies?

Houston leads with 67 headquartered companies, followed by Tehran (49) and Port Harcourt (41).

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 18,238 verified decision-maker contacts tracked across these 3,607 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 21, 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.