Company lists · Data refreshed September 2026

Top 25 Marine environmental engineering companies worldwide

Name: Marine environmental engineering companies worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 17, 2026 11,735 companies tracked

RevenueBase identified 11,735 marine environmental engineering companies worldwide as of September 2026 and tracks 358,941 professional contacts across them, including 97,189 with verified work emails and 0 with mobile numbers. The United States is the largest market and Singapore the largest hub.

This list covers marine environmental engineering 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 17, 2026. Country and city lists for marine environmental engineering 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 17, 2026 86% judged on-target in blind review

11,735Companies

358,941Contacts tracked

97,189Verified emails

0Mobile numbers

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The 25 largest marine environmental engineering companies worldwide

Ranked by team size

Top 25 of 11,735 marine environmental engineering companies worldwide, ranked by team size, largest first. Data refreshed Sep 17, 2026. RevenueBase Smart Search rates how each company's information relates to marine environmental engineering 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	Saipem	Partial evidence	Milan, ItalyHQ checked Sep 17, 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 17, 2026
2	Tetra Tech	Strong evidence	Pasadena, CA, United StatesHQ checked Sep 17, 2026	10001+	12,999 contacts →
	Strong evidence “Tetra Tech is the leader in water, environment and sustainable infrastructure, providing high-end technical and engineering services for projects worldwide.” Source: RevenueBase Database · checked Sep 17, 2026
3	Kongsberg Maritime	Partial evidence	Kongsberg, NorwayHQ checked Sep 17, 2026	5,001-10,000	5,555 contacts →
	Partial evidence “Kongsberg Maritime is your trusted partner in navigating the complexities of the maritime industry.” Source: RevenueBase Database · checked Sep 17, 2026
4	Deme Group	Strong evidence	Beveren-kruibeke-zwijndrecht, BelgiumHQ checked Sep 17, 2026	5,001-10,000	4,395 contacts →
	Strong 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 17, 2026
5	VAN Oord	Partial evidence	3063 Nh, NetherlandsHQ checked Sep 17, 2026	5,001-10,000	4,364 contacts →
	Partial evidence “Van Oord is a leading international marine contractor focusing on dredging, infrastructure and offshore energy projects.” Source: RevenueBase Database · checked Sep 17, 2026
6	DAMEN	Indirect evidence	Gorinchem, NetherlandsHQ checked Sep 17, 2026	10001+	4,210 contacts →
	Indirect evidence “Oceans, seas, lakes and rivers offer growing possibilities in the areas of trade, food, energy and recreation.” Source: RevenueBase Database · checked Sep 17, 2026
7	MAN Energy Solutions	Indirect evidence	Augsburg, GermanyHQ checked Sep 17, 2026	10001+	4,076 contacts →
	Indirect evidence “MAN Energy Solutions enables its customers to achieve sustainable value creation in the transition towards a carbon neutral future.” Source: RevenueBase Database · checked Sep 17, 2026
8	Boskalis	Partial evidence	Papendrecht, NetherlandsHQ checked Sep 17, 2026	10001+	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 17, 2026
9	Golder	Indirect evidence	Vancouver, BC, CanadaHQ checked Sep 17, 2026	5,001-10,000	3,167 contacts →
	Indirect evidence “Golder was acquired by WSP.” Source: RevenueBase Database · checked Sep 17, 2026
10	Bram Offshore	Indirect evidence	Rio De Janeiro, BrazilHQ checked Sep 17, 2026	1,001-5,000	2,922 contacts →
	Indirect evidence “Somos a Bram Offshore Transportes Marítimos, a maior empresa representante do Grupo Edison Chouest Offshore no Brasil, reconhecida como o fornecedor de soluções de transporte…” Source: RevenueBase Database · checked Sep 17, 2026
11	Heerema Marine Contractors	Partial evidence	Leiden, NetherlandsHQ checked Sep 17, 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 17, 2026
12	Allseas	Indirect evidence	Châtel-saint-denis, SwitzerlandHQ checked Sep 17, 2026	1,001-5,000	2,554 contacts →
	Indirect evidence “Allseas is a world-leading contractor in the offshore energy market.” Source: RevenueBase Database · checked Sep 17, 2026
13	Brown And Caldwell	Indirect evidence	Walnut Creek, CA, United StatesHQ checked Sep 17, 2026	1,001-5,000	2,473 contacts →
	Indirect evidence “Headquartered in Walnut Creek, Calif, Brown and Caldwell is an employee-owned firm with 2,100+ professionals serving clients locally and globally from 52 locations.” Source: RevenueBase Database · checked Sep 17, 2026
14	Geosyntec Consultants	Strong evidence	Boca Raton, FL, United StatesHQ checked Sep 17, 2026	1,001-5,000	2,393 contacts →
	Strong evidence “Geosyntec is a consulting and engineering firm that works with private and public sector clients to address new ventures and complex problems involving our environment, natural…” Source: RevenueBase Database · checked Sep 17, 2026
15	Zamil Offshore Services Company	Partial evidence	Al-khobar, Saudi ArabiaHQ checked Sep 17, 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 17, 2026
16	Providence	Strong evidence	Baton Rouge, LA, United StatesHQ checked Sep 17, 2026	n/a	2,232 contacts →
	Strong evidence “Providence is an employee-owned engineering and environmental consulting firm.” Source: RevenueBase Database · checked Sep 17, 2026
17	Chantiers DE L'atlantique	Partial evidence	Saint-nazaire, FranceHQ checked Sep 17, 2026	1,001-5,000	2,004 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
18	Executive Ship Management	Indirect evidence	SingaporeHQ checked Sep 17, 2026	5,001-10,000	1,915 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 17, 2026
19	Grupo CBO	Indirect evidence	Niterói, BrazilHQ checked Sep 17, 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 17, 2026
20	Carollo Engineers	Indirect evidence	Walnut Creek, CA, United StatesHQ checked Sep 17, 2026	1,001-5,000	1,718 contacts →
	Indirect evidence “For more than 90 years, Carollo Engineers has been dedicated exclusively to water and wastewater solutions.” Source: RevenueBase Database · checked Sep 17, 2026
21	Royal IHC	Partial evidence	Kinderdijk, NetherlandsHQ checked Sep 17, 2026	1,001-5,000	1,712 contacts →
	Partial evidence “Royal IHC is a leading supplier of maritime technology and expert craftsmanship.” Source: RevenueBase Database · checked Sep 17, 2026
22	Swca Environmental Consultants	Partial evidence	Phoenix, AZ, United StatesHQ checked Sep 17, 2026	1,001-5,000	1,629 contacts →
	Partial evidence “Founded on a commitment to sound science and creative solutions, SWCA is a leader in environmental and management consulting services.” Source: RevenueBase Database · checked Sep 17, 2026
23	Sembcorp Marine LTD	Strong evidence	SingaporeHQ checked Sep 17, 2026	1,001-5,000	1,610 contacts →
	Strong evidence “Delivering Sustainable Synergies for Global Possibilities Sembcorp Marine is an integrated brand offering one-stop engineering solutions for the offshore, marine and energy…” Source: RevenueBase Database · checked Sep 17, 2026
24	Weston Solutions, INC	Partial evidence	West Chester, PA, United StatesHQ checked Sep 17, 2026	1,001-5,000	1,441 contacts →
	Partial evidence “Weston Solutions, Inc.(Weston) is a 100% employee-owned environmental and infrastructure services firm committed to safety and providing measurable client value.” Source: RevenueBase Database · checked Sep 17, 2026
25	Maersk Supply Service	Indirect evidence	Rio De Janeiro, BrazilHQ checked Sep 17, 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 17, 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: marine environmental engineering 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 marine environmental engineering companies.
Partial evidence: Its own public description names part of marine environmental engineering companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name marine environmental engineering 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 11,735 marine environmental engineering companies worldwide

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Marine environmental engineering companies worldwide at a glance

As of Sep 17, 2026

27.1%Verified-email coverage

30.6Average contacts per company

11-50Median size (employees)

2.4%Largest-city concentration · Singapore

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

5,357

11-50

4,023

51-200

1,538

201-500

449

501-1,000

156

1,001-5,000

122

5,001-10,000

10001+

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 environmental engineering 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: 44 countries, largest first: the United States, Brazil, the United Kingdom, India, Türkiye, Italy, France, the Netherlands, Australia, Canada and 34 more. Country and city lists for marine environmental engineering companies are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “marine environmental engineering 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 marine environmental engineering 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 marine environmental engineering 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, 97,189 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.

Marine environmental engineering companies by location

56 lists · largest first

Every Marine environmental engineering 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 marine environmental engineering 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 marine environmental engineering companies are there worldwide?

RevenueBase identified 11,735 marine environmental engineering 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?

Saipem, headquartered in Milan, tops this list with the largest team on record.

Which country has the most marine environmental engineering companies?

The United States leads with 1,974 companies, followed by Brazil (1,145) and the United Kingdom (827). Every marine environmental engineering companies list by country and city is linked on this page.

Which city has the most marine environmental engineering companies?

Singapore leads with 279 headquartered companies, followed by Istanbul (150) and Dubai (137).

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 97,189 verified decision-maker contacts tracked across these 11,735 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.