Company lists · Data refreshed September 2026

Top 25 Offshore construction contractors worldwide

RevenueBase identified 3,895 offshore construction contractors worldwide as of September 2026 and tracks 397,293 professional contacts across them, including 72,458 with verified work emails and 0 with mobile numbers. The United States is the largest market and Singapore the largest hub.

This list covers offshore construction 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 offshore construction 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
3,895Companies
397,293Contacts tracked
72,458Verified emails
0Mobile numbers
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The 25 largest offshore construction contractors worldwide

Ranked by team size
Top 25 of 3,895 offshore construction contractors worldwide, ranked by team size, largest first. Data refreshed Sep 17, 2026. RevenueBase Smart Search rates how each company's information relates to offshore construction 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.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1Strong evidenceMilan, ItalyHQ checked Sep 17, 202610001+34,095 contacts →

Strong 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
2Partial evidenceHouston, TX, United StatesHQ checked Sep 17, 202610001+20,135 contacts →

Partial evidence

“McDermott is a premier provider of engineering and construction solutions to the energy industry.”

Source: RevenueBase Database · checked Sep 17, 2026
3Partial evidenceHouston, TX, United StatesHQ checked Sep 17, 202610001+12,031 contacts →

Partial evidence

“Oceaneering is a global technology company delivering engineered services and products and robotic solutions to the offshore energy, defense, aerospace, and manufacturing…”

Source: RevenueBase Database · checked Sep 17, 2026
4Partial evidenceAmsterdam, NetherlandsHQ checked Sep 17, 20265,001-10,0008,478 contacts →

Partial evidence

“SBM Offshore is the world’s deepwater ocean-infrastructure expert.”

Source: RevenueBase Database · checked Sep 17, 2026
5Indirect evidenceAbu Dhabi, United Arab EmiratesHQ checked Sep 17, 202610001+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
6Indirect evidenceHouston, TX, United StatesHQ checked Sep 17, 20265,001-10,0006,466 contacts →

Indirect evidence

“Long recognized for extraordinary performance, superb safety and long-standing partnerships, and now incorporating Frank’s International, Expro is focused on enabling our…”

Source: RevenueBase Database · checked Sep 17, 2026
7Partial evidenceSharjah, United Arab EmiratesHQ checked Sep 17, 20265,001-10,0006,080 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 17, 2026
8Strong evidenceHouston, TX, United StatesHQ checked Sep 17, 20265,001-10,0005,601 contacts →

Strong evidence

“Noble is a leading offshore drilling contractor for the oil and gas industry.”

Source: RevenueBase Database · checked Sep 17, 2026
9Indirect evidenceHouston, United StatesHQ checked Sep 17, 20261,001-5,0004,845 contacts →

Indirect evidence

“Seadrill is setting the standard in deepwater oil and gas drilling.”

Source: RevenueBase Database · checked Sep 17, 2026
10Indirect evidenceHouston, TX, United StatesHQ checked Sep 17, 202610001+4,749 contacts →

Indirect evidence

“FMC Technologies is now TechnipFMC.”

Source: RevenueBase Database · checked Sep 17, 2026
11Partial evidenceAbu Dhabi, United Arab EmiratesHQ checked Sep 17, 20265,001-10,0004,466 contacts →

Partial evidence

“Target Engineering Construction Company was established in 1975 and operates through its specialized divisions – Power, Oil and Gas Division and Civil & Marine Division.”

Source: RevenueBase Database · checked Sep 17, 2026
12Strong evidence3063 Nh, NetherlandsHQ checked Sep 17, 20265,001-10,0004,364 contacts →

Strong evidence

“Van Oord is a leading international marine contractor focusing on dredging, infrastructure and offshore energy projects.”

Source: RevenueBase Database · checked Sep 17, 2026
13Strong evidenceNasr City 1, United StatesHQ checked Sep 17, 20261,001-5,0003,370 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
14Indirect evidenceAl Khobar, Saudi ArabiaHQ checked Sep 17, 20265,001-10,0003,251 contacts →

Indirect evidence

“ADES is a world-leading international provider of oil and gas drilling services.”

Source: RevenueBase Database · checked Sep 17, 2026
15Indirect evidenceHouston, TX, United StatesHQ checked Sep 17, 20265,001-10,0003,173 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 17, 2026
16Partial evidenceBergen, NorwayHQ checked Sep 17, 20265,001-10,0002,942 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 17, 2026
17Indirect evidenceMacaé, BrazilHQ checked Sep 17, 20261,001-5,0002,752 contacts →

Indirect evidence

Source: RevenueBase Database · checked Sep 17, 2026
18Strong evidenceLeiden, NetherlandsHQ checked Sep 17, 20261,001-5,0002,643 contacts →

Strong evidence

“Heerema Marine Contractors is a world-leading marine contractor in the international offshore energy industry.”

Source: RevenueBase Database · checked Sep 17, 2026
19Indirect evidencePorto Alegre, BrazilHQ checked Sep 17, 20261,001-5,0002,461 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 17, 2026
20Indirect evidenceRio De Janeiro, BrazilHQ checked Sep 17, 20261,001-5,0002,427 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 17, 2026
21Indirect evidenceAngra Dos Reis, BrazilHQ checked Sep 17, 20265,001-10,0002,370 contacts →

Indirect evidence

“Empresa multinacional na área de construção e reparos de navios e plataformas.”

Source: RevenueBase Database · checked Sep 17, 2026
22Partial evidenceAl-khobar, Saudi ArabiaHQ checked Sep 17, 20261,001-5,0002,312 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 17, 2026
23Indirect evidenceHouston, TX, United StatesHQ checked Sep 17, 20265,001-10,0002,215 contacts →

Indirect evidence

“Oil States International, Inc.”

Source: RevenueBase Database · checked Sep 17, 2026
24Partial evidenceAl-khobar, Saudi ArabiaHQ checked Sep 17, 20265,001-10,0002,042 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 17, 2026
25Partial evidenceSaint-nazaire, FranceHQ checked Sep 17, 20261,001-5,0002,004 contacts →

Partial evidence

“Installée sur la façade Atlantique, Chantiers de l’Atlantique est une entreprise de construction maritime (paquebots, sous-stations…) et de services aux flottes.”

Source: RevenueBase Database · checked Sep 17, 2026

Showing 25 of 3,895 offshore construction contractors worldwide

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Offshore construction contractors worldwide at a glance

As of Sep 17, 2026
18.2%Verified-email coverage
102.0Average contacts per company
11-50Median size (employees)
5.0%Largest-city concentration · Singapore
Sep 17, 2026Page data refreshed

Companies by employee count

1-10
965
11-50
1,272
51-200
844
201-500
383
501-1,000
183
1,001-5,000
169
5,001-10,000
33
10001+
34

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 construction 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
26 countries, largest first: the United States, the United Kingdom, Nigeria, the United Arab Emirates, Norway, Singapore, Brazil, the Netherlands, India, Malaysia and 16 more. Country and city lists for offshore construction contractors are linked below.
What qualifies
Companies worldwide whose own description of what they do matches “offshore construction 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 offshore construction 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 offshore construction 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, 72,458 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.

Offshore construction contractors by location

27 lists · largest first

Every Offshore construction 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 offshore construction 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 offshore construction contractors are there worldwide?

RevenueBase identified 3,895 offshore construction 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 offshore construction contractors?

The United States leads with 599 companies, followed by the United Kingdom (486) and Nigeria (321). Every offshore construction contractors list by country and city is linked on this page.

Which city has the most offshore construction contractors?

Singapore leads with 193 headquartered companies, followed by Houston (148) and Port Harcourt (89).

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 72,458 verified decision-maker contacts tracked across these 3,895 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.