Company lists · Data refreshed October 2026

Top 25 Oil refinery maintenance contractors worldwide

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

Compiled by the RevenueBase Data Team Data refreshed Oct 22, 2026 4,666 companies tracked

RevenueBase identified 4,666 company matches for oil refinery maintenance contractors worldwide as of October 2026 and tracks 178,726 professional contacts across them, including 23,645 with verified work emails. The United States is the largest market and Tehran the largest hub.

This list covers company matches for oil refinery maintenance 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 22, 2026. Country and city lists for oil refinery maintenance 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 22, 2026 How this list was built

4,666Companies

178,726Contacts tracked

23,645Verified emails

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The 25 largest oil refinery maintenance contractors worldwide

Ranked by team size

Top 25 of 4,666 company matches for oil refinery maintenance contractors worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 22, 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	Bonatti	Exact match	Parma, United StatesHQ recorded Oct 22, 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 22, 2026 · View company records in RevenueBase
2	Bilfinger	Exact match	Mannheim, GermanyHQ recorded Oct 22, 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 22, 2026 · View company records in RevenueBase
3	Estrutural	Exact match	Porto Alegre, BrazilHQ recorded Oct 22, 2026	1,001-5,000	2,795 contacts →
	Exact match “Quem somos: Somos uma empresa nacional, com mais de 30 anos no segmento da construção, montagem e manutenção industrial.” Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
4	Qatar Engineering & Construction Company W.L.L	Exact match	Ras Laffan Industrial City (rlic), QatarHQ recorded Oct 22, 2026	5,001-10,000	2,397 contacts →
	Exact match “Qatar Engineering & Construction Company (Qcon) is the leading National EPC & Maintenance Contractor in the Oil & Gas, Petrochemical, Fertilizer and Power industries.” Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
5	ELFE	Exact match	Macaé, BrazilHQ recorded Oct 22, 2026	1,001-5,000	2,006 contacts →
	Exact match “No mercado há mais de duas décadas, a Axia é uma empresa nacional com atuação em operação e manutenção industrial.” Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
6	Brown & Root Industrial Services, LLC	Exact match	Baton Rouge, LA, United StatesHQ recorded Oct 22, 2026	5,001-10,000	1,969 contacts →
	Exact match “Brown & Root Industrial Services offers the full range of industrial services – engineering, construction, maintenance, turnaround, and specialty (painting, scaffolding…” Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
7	EMC Egyptian Maintenance Company	Exact match	New Cairo, EgyptHQ recorded Oct 22, 2026	5,001-10,000	1,949 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
8	Dietsmann	Exact match	Fontvieille, MonacoHQ recorded Oct 22, 2026	5,001-10,000	1,931 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
9	AYTB	Exact match	Jubail Industrial City, Saudi ArabiaHQ recorded Oct 22, 2026	5,001-10,000	1,887 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
10	Confipetrol S.A	Exact match	Bogotá, ColombiaHQ recorded Oct 22, 2026	1,001-5,000	1,727 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
11	Austin Industrial, INC	Exact match	La Porte, TX, United StatesHQ recorded Oct 22, 2026	1,001-5,000	1,719 contacts →
	Exact match “Austin Industrial delivers premier maintenance, construction, and soft craft services to the nation’s leading producers of oil, gas & chemicals; energy; and manufactured goods.” Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
12	Arabian Pipeline & Services Co. Ltd. Anabeeb	Exact match	Dammam, Saudi ArabiaHQ recorded Oct 22, 2026	5,001-10,000	1,610 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
13	Universal Plant Services	Exact match	Deer Park, TX, United StatesHQ recorded Oct 22, 2026	501-1,000	1,360 contacts →
	Exact match “Universal Plant Services (UPS) is the industry's foremost specialists in rotating and reciprocating equipment services.” Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
14	Nexxo S.A	Exact match	Concón, ChileHQ recorded Oct 22, 2026	1,001-5,000	1,357 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
15	Arabian Industries	Exact match	Alkhuwair, OmanHQ recorded Oct 22, 2026	10001+	1,330 contacts →
	Exact match “We deliver engineered solutions for the oil, gas and industrialised sectors through our manufacturing, EPC Projects, Maintenance & Turnarounds, Logistics & Rig Moving and Support…” Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
16	Egyptian Projects Operation And Maintenance Eprom	Exact match	Alexandria, EgyptHQ recorded Oct 22, 2026	1,001-5,000	1,323 contacts →
	Exact match “EPROM has been actively involved in the maintenance and operation of major projects within or outside Egypt offering services for refineries, petrochemical plants, fertilizers…” Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
17	Attock Refinery Limited	Exact match	Rawalpindi, PakistanHQ recorded Oct 22, 2026	501-1,000	1,322 contacts →
	Exact match “Attock Refinery Limited (ARL) is the pioneer and pacesetter in Pakistan’s petroleum refining sector.” Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
18	Strike	Exact match	Spring, TX, United StatesHQ recorded Oct 22, 2026	1,001-5,000	1,212 contacts →
	Exact match “Strike safely and reliably delivers the specialized asset maintenance, construction, and contracting services that are business-critical to the energy, chemical, manufacturing…” Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
19	Chennai Petroleum Corp. LTD Indian OIL	Exact match	Chennai, IndiaHQ recorded Oct 22, 2026	1,001-5,000	1,210 contacts →
	Exact match “Chennai Petroleum Corporation Limited (CPCL) is a subsidiary of IOCL with world class refining technologies and a dominant presence in South India.” Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
20	Cr3	Exact match	Nikonpattana, ThailandHQ recorded Oct 22, 2026	5,001-10,000	1,180 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
21	Irmãos Passaúra S A	Exact match	Curitiba, BrazilHQ recorded Oct 22, 2026	1,001-5,000	1,167 contacts →
	Exact match “Empresa de Montagem e Manutenção Industrial” Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
22	Emdad Group	Exact match	Abu Dhabi, United Arab EmiratesHQ recorded Oct 22, 2026	1,001-5,000	1,074 contacts →
	Exact match “Emdad LLC is a leading UAE-based service provider in the Oil & Gas sector, delivering integrated solutions that support upstream and downstream operations.” Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
23	Petromaint	Exact match	Alexandria, EgyptHQ recorded Oct 22, 2026	5,001-10,000	977 contacts →
	Exact match “Petromaint is an Egyptian General Petroleum Corporation “EGPC” investment company established in 1997, under the provisions of investment Law No.” Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
24	Adyard ABU Dhabi LLC	Exact match	Abu Dhabi, United Arab EmiratesHQ recorded Oct 22, 2026	1,001-5,000	968 contacts →
	Exact match “Adyard is one of the United Arab Emirates (UAE) leading providers of services to the oil and gas, power, and water industries.” Recorded in the RevenueBase company graph · Oct 22, 2026 · View company records in RevenueBase
25	Sapref	Exact match	Prospecton, South AfricaHQ recorded Oct 22, 2026	501-1,000	967 contacts →
	Exact match “SAPREF is a joint venture between Shell SA Refining and BP Southern Africa.” Recorded in the RevenueBase company graph · Oct 22, 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 refinery maintenance 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 4,666 oil refinery maintenance contractors worldwide

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Oil refinery maintenance contractors worldwide at a glance

As of Oct 22, 2026

13.2%Verified-email coverage

38.3Average contacts per company

11-50Median size (employees)

2.1%Largest-city concentration · Tehran

Oct 22, 2026Page data refreshed

Companies by employee count

1-10

1,174

11-50

1,687

51-200

1,014

201-500

394

501-1,000

174

1,001-5,000

163

5,001-10,000

10001+

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 refinery maintenance contractors are linked below.
What qualifies: Company records worldwide whose business descriptions match “oil refinery maintenance 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 23,645 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 22, 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 refinery maintenance contractors by location

31 lists · largest first

Every Oil refinery maintenance 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 refinery maintenance contractors”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many oil refinery maintenance contractors are there worldwide?

RevenueBase identified 4,666 company matches for oil refinery maintenance 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?

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

Which country has the most oil refinery maintenance contractors?

The United States leads with 691 companies, followed by Brazil (310) and Italy (171). Every oil refinery maintenance contractors list by country and city is linked on this page.

Which city has the most oil refinery maintenance contractors?

Tehran leads with 96 company records, followed by Houston (80) and Abu Dhabi (58).

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 23,645 professional contacts with verified work emails tracked across these 4,666 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 22, 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.