Company lists · Data refreshed September 2026

Top 25 Marine geotechnical firms worldwide

RevenueBase identified 11,719 marine geotechnical firms worldwide as of September 2026 and tracks 234,815 professional contacts across them, including 64,378 with verified work emails. The United States is the largest market and Singapore the largest hub.

This list covers marine geotechnical 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 20, 2026. Country and city lists for marine geotechnical 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 20, 2026 86% judged on-target in blind review
11,719Companies
234,815Contacts tracked
64,378Verified emails
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The 25 largest marine geotechnical firms worldwide

Ranked by team size
Top 25 of 11,719 marine geotechnical firms worldwide, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to marine geotechnical 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.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1Indirect evidenceOlathe, KS, United StatesHQ checked Sep 20, 20265,001-10,0006,113 contacts →

Indirect evidence

“Terracon is a 100 percent employee-owned consulting engineering firm providing quality services to clients.”

Source: RevenueBase Database · checked Sep 20, 2026
2Partial evidenceBeveren-kruibeke-zwijndrecht, BelgiumHQ checked Sep 20, 20265,001-10,0004,395 contacts →

Partial evidence

“DEME (Euronext Brussels: DEME) is a leading contractor in the fields of offshore energy, dredging and marine infrastructure, and environmental remediation.”

Source: RevenueBase Database · checked Sep 20, 2026
3Partial evidence3063 Nh, NetherlandsHQ checked Sep 20, 20265,001-10,0004,364 contacts →

Partial evidence

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

Source: RevenueBase Database · checked Sep 20, 2026
4Partial evidenceLondon, United KingdomHQ checked Sep 20, 20265,001-10,0003,960 contacts →

Partial evidence

“Every day, people around the world live, work and play on ground prepared by Keller, the world's largest geotechnical specialist contractor.”

Source: RevenueBase Database · checked Sep 20, 2026
5Partial evidenceBeijing, ChinaHQ checked Sep 20, 20265,001-10,0003,835 contacts →

Partial evidence

“CHEC is focused on basic infrastructure construction, such as Marine Engineering, Dredging and Reclamation, Road and Bridge, Railways, Airports, Complete Plant, and other works.”

Source: RevenueBase Database · checked Sep 20, 2026
6Partial evidencePapendrecht, NetherlandsHQ checked Sep 20, 202610001+3,366 contacts →

Partial evidence

“Boskalis is a leading global services provider operating in the dredging, maritime infrastructure and maritime services sectors.”

Source: RevenueBase Database · checked Sep 20, 2026
7Partial evidenceLeiden, NetherlandsHQ checked Sep 20, 20261,001-5,0002,643 contacts →

Partial evidence

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

Source: RevenueBase Database · checked Sep 20, 2026
8Indirect evidenceMumbai, IndiaHQ checked Sep 20, 20261,001-5,0002,620 contacts →

Indirect evidence

Source: RevenueBase Database · checked Sep 20, 2026
9Indirect evidenceChâtel-saint-denis, SwitzerlandHQ checked Sep 20, 20261,001-5,0002,554 contacts →

Indirect evidence

“Allseas is a world-leading contractor in the offshore energy market.”

Source: RevenueBase Database · checked Sep 20, 2026
10Partial evidenceMusaffah Industrial, United Arab EmiratesHQ checked Sep 20, 20261,001-5,0002,365 contacts →

Partial evidence

“NMDC Dredging & Marine was established in 1976 as a dredging division of Abu Dhabi National Oil Company (ADNOC).”

Source: RevenueBase Database · checked Sep 20, 2026
11Indirect evidenceBrazilHQ checked Sep 20, 2026n/a2,224 contacts →

Indirect evidence

“Rov company.”

Source: RevenueBase Database · checked Sep 20, 2026
12Indirect evidenceChantilly, VA, United StatesHQ checked Sep 20, 20261,001-5,0002,210 contacts →

Indirect evidence

“ECS Group of Companies is a Chantilly, VA-based consulting engineering firm.”

Source: RevenueBase Database · checked Sep 20, 2026
13Indirect evidenceNiterói, BrazilHQ checked Sep 20, 20261,001-5,0001,847 contacts →

Indirect evidence

“O Grupo CBO é uma das maiores empresas de apoio marítimo do Brasil.”

Source: RevenueBase Database · checked Sep 20, 2026
14Partial evidenceAmman, JordanHQ checked Sep 20, 20261,001-5,0001,476 contacts →

Partial evidence

“At ACES, we offer a wide range of specialized engineering services including site and geotechnical investigation, materials technology and testing, quality control of projects…”

Source: RevenueBase Database · checked Sep 20, 2026
15Indirect evidenceAbu Dhabi, United Arab EmiratesHQ checked Sep 20, 2026201-5001,279 contacts →

Indirect evidence

“(Underwater Engineering) S.A.L was established in 1976.”

Source: RevenueBase Database · checked Sep 20, 2026
16Indirect evidenceRueil-malmaison, FranceHQ checked Sep 20, 20265,001-10,0001,222 contacts →

Indirect evidence

“Soletanche Bachy is a world benchmark in foundations and soil technologies, and is involved in over projects every year.”

Source: RevenueBase Database · checked Sep 20, 2026
17Indirect evidenceUnited Arab EmiratesHQ checked Sep 20, 20261,001-5,0001,216 contacts →

Indirect evidence

“Aries is the largest Engineering, Inspection & Maintenance firm in the Middle East.”

Source: RevenueBase Database · checked Sep 20, 2026
18Indirect evidenceMatriz, BrazilHQ checked Sep 20, 20261,001-5,0001,108 contacts →

Indirect evidence

“A Belov Engenharia foi criada em 1981 em Salvador/BA, pelo engenheiro Aleixo Belov, que à época desfrutava de uma experiência de 15 anos de participação na condução das maiores…”

Source: RevenueBase Database · checked Sep 20, 2026
19Partial evidenceLaksevåg, NorwayHQ checked Sep 20, 20261,001-5,0001,031 contacts →

Partial evidence

“Shearwater is a global marine geoscience and technology business.”

Source: RevenueBase Database · checked Sep 20, 2026
20Indirect evidenceHouston, TX, United StatesHQ checked Sep 20, 20261,001-5,000916 contacts →

Indirect evidence

“Great Lakes Dredge & Dock (GLDD) is the largest provider of dredging services in the United States and the only U.S.”

Source: RevenueBase Database · checked Sep 20, 2026
21Indirect evidenceNorwood, MA, United StatesHQ checked Sep 20, 2026501-1,000880 contacts →

Indirect evidence

“Founded in 1964 as a soils and foundations specialty consultant, GZA GeoEnvironmental, Inc.(GZA) has grown into a full-service company providing its clients with highly…”

Source: RevenueBase Database · checked Sep 20, 2026
22Partial evidenceCranford, NJ, United StatesHQ checked Sep 20, 20261,001-5,000847 contacts →

Partial evidence

“Founded in 1919, Weeks Marine, Inc.”

Source: RevenueBase Database · checked Sep 20, 2026
23Partial evidenceRavenna, ItalyHQ checked Sep 20, 2026201-500841 contacts →

Partial evidence

“MICOPERI has been active in the marine sector since 1946 when the company was incorporated as a salvage company to free the shipping routes from vessels sunk during the Second…”

Source: RevenueBase Database · checked Sep 20, 2026
24Partial evidenceAbu Dhabi, United Arab EmiratesHQ checked Sep 20, 20261,001-5,000793 contacts →

Partial evidence

“With offices in Abu Dhabi, Dubai, Qatar and Singapore, Allianz Middle East Ship Management LLC(Allianz-ME) is a well-established marine contractors providing modern Offshore…”

Source: RevenueBase Database · checked Sep 20, 2026
25Indirect evidenceHouston, TX, United StatesHQ checked Sep 20, 2026n/a789 contacts →

Indirect evidence

“Energo Engineering is a KBR Company that provides the full package of structural integrity management (SIM) and advanced structural engineering services for offshore floating and…”

Source: RevenueBase Database · checked Sep 20, 2026

Showing 25 of 11,719 marine geotechnical firms worldwide

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Marine geotechnical firms worldwide at a glance

As of Sep 20, 2026
27.4%Verified-email coverage
20.0Average contacts per company
11-50Median size (employees)
1.2%Largest-city concentration · Singapore
Sep 20, 2026Page data refreshed

Companies by employee count

1-10
5,481
11-50
4,025
51-200
1,523
201-500
408
501-1,000
119
1,001-5,000
66
5,001-10,000
14
10001+
15

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 marine geotechnical 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 marine geotechnical firms are linked below.
What qualifies
Companies worldwide whose own description of what they do matches “marine geotechnical 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 marine geotechnical 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 marine geotechnical 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, 64,378 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 20, 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.

Marine geotechnical firms by location

43 lists · largest first

Every Marine geotechnical 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 marine geotechnical 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 marine geotechnical firms are there worldwide?

RevenueBase identified 11,719 marine geotechnical 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?

Terracon, headquartered in Olathe, tops this list with the largest team on record.

Which country has the most marine geotechnical firms?

The United States leads with 1,846 companies, followed by the United Kingdom (867) and Brazil (680). Every marine geotechnical firms list by country and city is linked on this page.

Which city has the most marine geotechnical firms?

Singapore leads with 144 headquartered companies, followed by Dubai (94) and Sao Paulo (90).

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 64,378 verified decision-maker contacts tracked across these 11,719 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 20, 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.