Company lists · Data refreshed September 2026

Top 25 Offshore platform maintenance companies worldwide

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

Compiled by the RevenueBase Data Team Data refreshed Sep 29, 2026 4,241 companies tracked

RevenueBase identified 4,241 offshore platform maintenance companies worldwide as of September 2026 and tracks 228,660 professional contacts across them, including 34,955 with verified work emails. The United States is the largest market and Singapore the largest hub.

This list covers offshore platform 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 29, 2026. Country and city lists for offshore platform 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 29, 2026 86% judged on-target in blind review

4,241Companies

228,660Contacts tracked

34,955Verified emails

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The 25 largest offshore platform maintenance companies worldwide

Ranked by team size

Top 25 of 4,241 offshore platform maintenance companies worldwide, ranked by team size, largest first. Data refreshed Sep 29, 2026. RevenueBase Smart Search rates how each company's information relates to offshore platform 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	Transocean	Partial evidence	Zug, SwitzerlandHQ checked Sep 29, 2026	1,001-5,000	10,068 contacts →
	Partial evidence “Transocean is a leading international provider of offshore contract drilling services for oil and gas wells.” Source: RevenueBase Database · checked Sep 29, 2026
2	SBM Offshore	Partial evidence	Amsterdam, NetherlandsHQ checked Sep 29, 2026	5,001-10,000	8,478 contacts →
	Partial evidence “SBM Offshore is the world’s deepwater ocean-infrastructure expert.” Source: RevenueBase Database · checked Sep 29, 2026
3	Noble Corporation	Partial evidence	Houston, TX, United StatesHQ checked Sep 29, 2026	5,001-10,000	5,601 contacts →
	Partial evidence “Noble is a leading offshore drilling contractor for the oil and gas industry.” Source: RevenueBase Database · checked Sep 29, 2026
4	MODEC	Partial evidence	Chuo-ku, JapanHQ checked Sep 29, 2026	5,001-10,000	5,077 contacts →
	Partial evidence “MODEC has been a leading provider of solutions for the floating offshore oil and gas market for over 50 years.” Source: RevenueBase Database · checked Sep 29, 2026
5	Cotemar	Indirect evidence	Ciudad Del Carmen, MexicoHQ checked Sep 29, 2026	5,001-10,000	4,138 contacts →
	Indirect evidence “We are Mexican company specialized in services for the oil industry since 1979.” Source: RevenueBase Database · checked Sep 29, 2026
6	Valaris Limited	Indirect evidence	Houston, TX, United StatesHQ checked Sep 29, 2026	5,001-10,000	3,173 contacts →
	Indirect evidence “We Are Valaris With decades of expertise and strategic commitment built on efficiency, capability and ingenuity, our sights are continually set toward a future built with purpose…” Source: RevenueBase Database · checked Sep 29, 2026
7	Engeman	Indirect evidence	Recife, BrazilHQ checked Sep 29, 2026	5,001-10,000	2,746 contacts →
	Indirect evidence “Fundada em 1983, a Engeman atua com excelência no desenvolvimento de soluções para os diversos setores da indústria.” Source: RevenueBase Database · checked Sep 29, 2026
8	Heerema Marine Contractors	Partial evidence	Leiden, NetherlandsHQ checked Sep 29, 2026	1,001-5,000	2,643 contacts →
	Partial evidence “Heerema Marine Contractors is a world-leading marine contractor in the international offshore energy industry.” Source: RevenueBase Database · checked Sep 29, 2026
9	Allseas	Partial evidence	Châtel-saint-denis, SwitzerlandHQ checked Sep 29, 2026	1,001-5,000	2,554 contacts →
	Partial evidence “Allseas is a world-leading contractor in the offshore energy market.” Source: RevenueBase Database · checked Sep 29, 2026
10	Estrutural	Indirect evidence	Porto Alegre, BrazilHQ checked Sep 29, 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 29, 2026
11	OCYAN	Indirect evidence	Rio De Janeiro, BrazilHQ checked Sep 29, 2026	1,001-5,000	2,427 contacts →
	Indirect evidence “A OCYAN atua há décadas na prestação de serviços para o setor de óleo e gás upstream, estruturando suas operações em três frentes de atuação.” Source: RevenueBase Database · checked Sep 29, 2026
12	Brasfels	Indirect evidence	Angra Dos Reis, BrazilHQ checked Sep 29, 2026	5,001-10,000	2,370 contacts →
	Indirect evidence “Empresa multinacional na área de construção e reparos de navios e plataformas.” Source: RevenueBase Database · checked Sep 29, 2026
13	Zamil Offshore Services Company	Partial evidence	Al-khobar, Saudi ArabiaHQ checked Sep 29, 2026	1,001-5,000	2,312 contacts →
	Partial evidence “Zamil Offshore Services Company has been offering diversified offshore and marine support services to the oil and gas industry since 1977.” Source: RevenueBase Database · checked Sep 29, 2026
14	Free Lancer	Indirect evidence	BrazilHQ checked Sep 29, 2026	n/a	2,224 contacts →
	Indirect evidence “Rov company.” Source: RevenueBase Database · checked Sep 29, 2026
15	Arabian Drilling	Partial evidence	Al-khobar, Saudi ArabiaHQ checked Sep 29, 2026	5,001-10,000	2,042 contacts →
	Partial evidence “We are the region’s trusted onshore and offshore oil & gas drilling company with an extensive track record of operational excellence and advanced capabilities that have enabled…” Source: RevenueBase Database · checked Sep 29, 2026
16	EMC Egyptian Maintenance Company	Partial evidence	New Cairo, EgyptHQ checked Sep 29, 2026	5,001-10,000	2,003 contacts →
	Partial 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 29, 2026
17	ELFE	Indirect evidence	Macaé, BrazilHQ checked Sep 29, 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 29, 2026
18	Grupo CBO	Indirect evidence	Niterói, BrazilHQ checked Sep 29, 2026	1,001-5,000	1,847 contacts →
	Indirect evidence “O Grupo CBO é uma das maiores empresas de apoio marítimo do Brasil.” Source: RevenueBase Database · checked Sep 29, 2026
19	Dietsmann	Partial evidence	Fontvieille, MonacoHQ checked Sep 29, 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 29, 2026
20	Groupe Ponticelli Frères	Indirect evidence	FranceHQ checked Sep 29, 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 29, 2026
21	Helix Energy Solutions Group	Partial evidence	Houston, TX, United StatesHQ checked Sep 29, 2026	1,001-5,000	1,706 contacts →
	Partial evidence “Helix Energy Solutions, headquartered in Houston, Texas, is an international offshore energy services company that provides specialty services to the offshore energy industry…” Source: RevenueBase Database · checked Sep 29, 2026
22	Rawabi Vallianz Offshore Services	Partial evidence	Al Khobar, Saudi ArabiaHQ checked Sep 29, 2026	1,001-5,000	1,664 contacts →
	Partial evidence “With an extensive fleet of over 200 vessels worldwide, Rawabi Vallianz Offshore Services leverages Rawabi’s expertise to ensure exceptional quality and on-time delivery.” Source: RevenueBase Database · checked Sep 29, 2026
23	Bumi Armada	Indirect evidence	Kuala Lumpur, MalaysiaHQ checked Sep 29, 2026	1,001-5,000	1,628 contacts →
	Indirect evidence “At Bumi Armada, we amplify competency to resonate with the changing Oil & Gas industry demands, values and expectations.” Source: RevenueBase Database · checked Sep 29, 2026
24	Tp-Otc	Partial evidence	Çankaya, TürkiyeHQ checked Sep 29, 2026	501-1,000	1,501 contacts →
	Partial evidence “TP-OTC is established to provide all engineering and technology services for offshore operations in oil and gas industry.” Source: RevenueBase Database · checked Sep 29, 2026
25	Maersk Supply Service	Indirect evidence	Rio De Janeiro, BrazilHQ checked Sep 29, 2026	201-500	1,407 contacts →
	Indirect evidence “With more than 50 years of legacy, Maersk Supply Service celebrates a new important milestone: from November 1st, our headquarters are officially located in Brazil.” Source: RevenueBase Database · checked Sep 29, 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: offshore platform 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 offshore platform maintenance companies.
Partial evidence: Its own public description names part of offshore platform maintenance companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name offshore platform 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 4,241 offshore platform maintenance companies worldwide

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Offshore platform maintenance companies worldwide at a glance

As of Sep 29, 2026

15.3%Verified-email coverage

53.9Average contacts per company

11-50Median size (employees)

4.0%Largest-city concentration · Singapore

Sep 29, 2026Page data refreshed

Companies by employee count

1-10

1,217

11-50

1,568

51-200

825

201-500

313

501-1,000

136

1,001-5,000

125

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 offshore platform 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 offshore platform maintenance companies are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “offshore platform 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 offshore platform 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 offshore platform 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, 34,955 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 29, 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.

Offshore platform maintenance companies by location

32 lists · largest first

Every Offshore platform maintenance companies 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 offshore platform 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 offshore platform maintenance companies are there worldwide?

RevenueBase identified 4,241 offshore platform 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?

Transocean, headquartered in Zug, tops this list with the largest team on record.

Which country has the most offshore platform maintenance companies?

The United States leads with 379 companies, followed by Brazil (271) and the United Arab Emirates (252). Every offshore platform maintenance companies list by country and city is linked on this page.

Which city has the most offshore platform maintenance companies?

Singapore leads with 169 headquartered companies, followed by Dubai (101) and Houston (80).

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 34,955 verified decision-maker contacts tracked across these 4,241 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 29, 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.