Company lists · Data refreshed September 2026

Top 25 Offshore platform maintenance services worldwide

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

Compiled by the RevenueBase Data Team Data refreshed Sep 29, 2026 9,430 companies tracked

RevenueBase identified 9,430 offshore platform maintenance services worldwide as of September 2026 and tracks 489,291 professional contacts across them, including 75,304 with verified work emails. The United States is the largest market and Singapore the largest hub.

This list covers offshore platform maintenance services 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 services 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

9,430Companies

489,291Contacts tracked

75,304Verified emails

Explore this list → Free signup · no credit card · 500 free credits

The 25 largest offshore platform maintenance services worldwide

Ranked by team size

Top 25 of 9,430 offshore platform maintenance services 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 services: 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 29, 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 29, 2026
2	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
3	Lamprell	Partial evidence	Sharjah, United Arab EmiratesHQ checked Sep 29, 2026	5,001-10,000	6,080 contacts →
	Partial 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 29, 2026
4	Nabors Industries	Indirect evidence	Houston, TX, United StatesHQ checked Sep 29, 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 29, 2026
5	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
6	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
7	Seatrium	Partial evidence	United StatesHQ checked Sep 29, 2026	10001+	4,522 contacts →
	Partial evidence “A Premier Global Player with Deep Engineering Expertise in the offshore, marine and energy industries Engineering our Future Together.” Source: RevenueBase Database · checked Sep 29, 2026
8	STORK	Partial evidence	Utrecht, NetherlandsHQ checked Sep 29, 2026	10001+	4,073 contacts →
	Partial evidence “Stork is a global provider of integrated operations, maintenance, modification and asset integrity solutions.” Source: RevenueBase Database · checked Sep 29, 2026
9	CBSI	Indirect evidence	Volta Redonda, BrazilHQ checked Sep 29, 2026	10001+	3,658 contacts →
	Indirect evidence “Somos a CBSI!” Source: RevenueBase Database · checked Sep 29, 2026
10	Ortec Group	Indirect evidence	Aix-en-provence, FranceHQ checked Sep 29, 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 29, 2026
11	ADES	Indirect evidence	Al Khobar, Saudi ArabiaHQ checked Sep 29, 2026	5,001-10,000	3,251 contacts →
	Indirect evidence “ADES is a world-leading international provider of oil and gas drilling services.” Source: RevenueBase Database · checked Sep 29, 2026
12	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
13	Altrad	Indirect evidence	Montpellier, FranceHQ checked Sep 29, 2026	10001+	3,056 contacts →
	Indirect 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 29, 2026
14	DOF	Partial evidence	Bergen, NorwayHQ checked Sep 29, 2026	5,001-10,000	2,942 contacts →
	Partial evidence “With a multi-national workforce of over 5,700 personnel, DOF is an international group of companies which owns and operates a fleet of modern offshore/subsea vessels, with an…” Source: RevenueBase Database · checked Sep 29, 2026
15	Gran Services S.A	Indirect evidence	Macaé, BrazilHQ checked Sep 29, 2026	1,001-5,000	2,752 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 29, 2026
16	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
17	Brand Energy & Infrastructure Services	Partial evidence	GermanyHQ checked Sep 29, 2026	10001+	2,676 contacts →
	Partial evidence “Brand Energy & Infrastructure Services supports customers’ maintenance, turnaround and refurbishment needs as well as new construction, capital-driven upgrades and expansion…” Source: RevenueBase Database · checked Sep 29, 2026
18	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
19	Enermech	Indirect evidence	Aberdeen, United KingdomHQ checked Sep 29, 2026	1,001-5,000	2,640 contacts →
	Indirect evidence “EnerMech delivers integrated specialist services that support critical assets across the energy and infrastructure sectors worldwide.” Source: RevenueBase Database · checked Sep 29, 2026
20	Kaefer	Indirect evidence	Bremen, GermanyHQ checked Sep 29, 2026	10001+	2,624 contacts →
	Indirect evidence “For over a century, KAEFER has been helping clients to protect and extend the life of their most valuable assets, while ensuring operational efficiency and the smooth delivery of…” Source: RevenueBase Database · checked Sep 29, 2026
21	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
22	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
23	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
24	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
25	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

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 services. 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 services.
Partial evidence: Its own public description names part of offshore platform maintenance services, 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 services. 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 9,430 offshore platform maintenance services worldwide

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 75,304 reachable decision-makers.

Free signup · no credit card

View the full list →

Offshore platform maintenance services worldwide at a glance

As of Sep 29, 2026

15.4%Verified-email coverage

51.9Average contacts per company

11-50Median size (employees)

2.6%Largest-city concentration · Singapore

Sep 29, 2026Page data refreshed

Companies by employee count

1-10

2,520

11-50

3,435

51-200

1,985

201-500

764

501-1,000

330

1,001-5,000

278

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 services, 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 services are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “offshore platform maintenance services”. 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 services), 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 services, 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, 75,304 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 services by location

60 lists · largest first

Every Offshore platform maintenance services 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 services, 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 services are there worldwide?

RevenueBase identified 9,430 offshore platform maintenance services 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 offshore platform maintenance services?

The United States leads with 881 companies, followed by Brazil (628) and the United Kingdom (577). Every offshore platform maintenance services list by country and city is linked on this page.

Which city has the most offshore platform maintenance services?

Singapore leads with 249 headquartered companies, followed by Houston (202) and Port Harcourt (174).

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 75,304 verified decision-maker contacts tracked across these 9,430 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.

Ready to reach these companies? Verified emails and direct dials for all 9,430 offshore platform maintenance services worldwide. Start with a free account, no credit card.

Download this list →

Related lists

Browse the directory

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.