Company lists · Data refreshed September 2026

Top 25 Subsea consulting firms worldwide

Name: Subsea consulting firms worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 29, 2026 8,218 companies tracked

RevenueBase identified 8,218 subsea consulting firms worldwide as of September 2026 and tracks 300,935 professional contacts across them, including 54,952 with verified work emails. The United Kingdom is the largest market and Houston the largest hub.

This list covers subsea consulting firms 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 subsea consulting firms 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

8,218Companies

300,935Contacts tracked

54,952Verified emails

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The 25 largest subsea consulting firms worldwide

Ranked by team size

Top 25 of 8,218 subsea consulting firms worldwide, ranked by team size, largest first. Data refreshed Sep 29, 2026. RevenueBase Smart Search rates how each company's information relates to subsea consulting firms: 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	Indirect evidence	Milan, ItalyHQ checked Sep 29, 2026	10001+	34,095 contacts →
	Indirect 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	Amec Foster Wheeler	Indirect evidence	Aberdeen, United KingdomHQ checked Sep 29, 2026	10001+	14,368 contacts →
	Indirect evidence “Wood Group has combined with Amec Foster Wheeler to form a new global leader in the delivery of project, engineering and technical services to energy and industrial markets.” Source: RevenueBase Database · checked Sep 29, 2026
3	Technip Former Company	Indirect evidence	United KingdomHQ checked Sep 29, 2026	10001+	11,255 contacts →
	Indirect evidence “Technip is a former company that was separated into two independent companies: TechnipFMC and Technip Energies, which now operate with no capital ties.” Source: RevenueBase Database · checked Sep 29, 2026
4	EXPRO	Indirect evidence	Houston, TX, United StatesHQ checked Sep 29, 2026	5,001-10,000	6,466 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 29, 2026
5	Lamprell	Indirect evidence	Sharjah, United Arab EmiratesHQ checked Sep 29, 2026	5,001-10,000	6,080 contacts →
	Indirect 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
6	Seatrium	Indirect evidence	United StatesHQ checked Sep 29, 2026	10001+	4,522 contacts →
	Indirect 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
7	ENPPI	Indirect evidence	Nasr City 1, United StatesHQ checked Sep 29, 2026	1,001-5,000	3,370 contacts →
	Indirect 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 29, 2026
8	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
9	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
10	Heerema Marine Contractors	Indirect evidence	Leiden, NetherlandsHQ checked Sep 29, 2026	1,001-5,000	2,643 contacts →
	Indirect evidence “Heerema Marine Contractors is a world-leading marine contractor in the international offshore energy industry.” 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	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
13	Oceanica	Indirect evidence	Macaé - Rj, BrazilHQ checked Sep 29, 2026	1,001-5,000	2,213 contacts →
	Indirect evidence “OCEÂNICA is a Brazilian company dedicated to providing services and engineering technology solutions for companies with underwater activities” Source: RevenueBase Database · checked Sep 29, 2026
14	Aarvi Encon	Indirect evidence	Mumbai, IndiaHQ checked Sep 29, 2026	5,001-10,000	1,890 contacts →
	Indirect evidence “Aarvi Encon has established it's leadership in providing Engineering Consultancy and Technical Assistance to Oil & Gas, Refinery, Petrochemical, Pipelines, Power & Infrastructure…” Source: RevenueBase Database · checked Sep 29, 2026
15	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
16	Helix Energy Solutions Group	Indirect evidence	Houston, TX, United StatesHQ checked Sep 29, 2026	1,001-5,000	1,706 contacts →
	Indirect 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
17	Tp-Otc	Indirect evidence	Çankaya, TürkiyeHQ checked Sep 29, 2026	501-1,000	1,501 contacts →
	Indirect 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
18	RENCO	Indirect evidence	Pesaro, ItalyHQ checked Sep 29, 2026	1,001-5,000	1,494 contacts →
	Indirect evidence “Renco S.p.A, an Italian company founded in 1979, is continually committed to providing its Clients with sound business solutions in an ever increasingly complex and challenging…” Source: RevenueBase Database · checked Sep 29, 2026
19	Deepocean	Indirect evidence	Oslo, NorwayHQ checked Sep 29, 2026	1,001-5,000	1,375 contacts →
	Indirect evidence “DeepOcean is a technology-driven, independent solution provider in the ocean space.” Source: RevenueBase Database · checked Sep 29, 2026
20	Dragados Offshore	Indirect evidence	11510 Puerto Real, SpainHQ checked Sep 29, 2026	1,001-5,000	1,348 contacts →
	Indirect evidence “Founded in 1972, Dragados Offshore S.A.” Source: RevenueBase Database · checked Sep 29, 2026
21	CCC Underwater Engineering S.A.L	Indirect evidence	Abu Dhabi, United Arab EmiratesHQ checked Sep 29, 2026	201-500	1,279 contacts →
	Indirect evidence “(Underwater Engineering) S.A.L was established in 1976.” Source: RevenueBase Database · checked Sep 29, 2026
22	Abraj Energy Services	Indirect evidence	Muscat, OmanHQ checked Sep 29, 2026	1,001-5,000	1,244 contacts →
	Indirect evidence “Abraj Energy Services ("Abraj"), was founded in May 2006 and has taken major strides.” Source: RevenueBase Database · checked Sep 29, 2026
23	AL Turki Enterprises L.L.C	Indirect evidence	United StatesHQ checked Sep 29, 2026	1,001-5,000	1,226 contacts →
	Indirect evidence “At Al Turki’s Oil and Gas Division, we carry out multi-disciplined Engineering Design, Procurement and Construction service in the southern region of Oman with our Off-plot…” Source: RevenueBase Database · checked Sep 29, 2026
24	Aries Marine And Engineering Services	Indirect evidence	United Arab EmiratesHQ checked Sep 29, 2026	1,001-5,000	1,216 contacts →
	Indirect evidence “Aries is the largest Engineering, Inspection & Maintenance firm in the Middle East.” Source: RevenueBase Database · checked Sep 29, 2026
25	Zuhair Fayez	Partial evidence	Riyadh, Saudi ArabiaHQ checked Sep 29, 2026	1,001-5,000	1,113 contacts →
	Partial evidence “Zuhair Fayez stands as the region's foremost engineering and consulting firm, renowned for our innovative approach in architecture, project management, and oil and gas services.” 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: subsea consulting firms. 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 subsea consulting firms.
Partial evidence: Its own public description names part of subsea consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name subsea consulting firms. 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 8,218 subsea consulting firms worldwide

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Subsea consulting firms worldwide at a glance

As of Sep 29, 2026

18.3%Verified-email coverage

36.6Average contacts per company

11-50Median size (employees)

3.3%Largest-city concentration · Houston

Sep 29, 2026Page data refreshed

Companies by employee count

1-10

3,695

11-50

2,642

51-200

1,178

201-500

378

501-1,000

143

1,001-5,000

115

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 subsea consulting firms, 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 subsea consulting firms are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “subsea consulting firms”. 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 subsea consulting firms), 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 subsea consulting firms, 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, 54,952 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.

Subsea consulting firms by location

53 lists · largest first

Every Subsea consulting firms 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 subsea consulting firms, 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 subsea consulting firms are there worldwide?

RevenueBase identified 8,218 subsea consulting firms 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 subsea consulting firms?

The United Kingdom leads with 980 companies, followed by the United States (973) and Nigeria (407). Every subsea consulting firms list by country and city is linked on this page.

Which city has the most subsea consulting firms?

Houston leads with 272 headquartered companies, followed by Singapore (190) and Aberdeen (156).

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 54,952 verified decision-maker contacts tracked across these 8,218 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.