Company lists · Data refreshed September 2026

Top 25 Marine environmental consulting firms worldwide

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

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 18,100 companies tracked

RevenueBase identified 18,100 company matches for marine environmental consulting firms worldwide as of September 2026 and tracks 289,762 professional contacts across them, including 82,856 with verified work emails. The United States is the largest market and Singapore the largest hub.

This list covers company matches for marine environmental consulting firms worldwide, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 28, 2026. Country and city lists for marine environmental consulting firms follow the table.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 RevenueBase SmartSearch · Exact Recorded Sep 28, 2026 How this list was built

18,100Companies

289,762Contacts tracked

82,856Verified emails

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The 25 largest marine environmental consulting firms worldwide

Ranked by team size

Top 25 of 18,100 company matches for marine environmental consulting firms worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 28, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Terracon	Exact match	Olathe, KS, United StatesHQ recorded Sep 28, 2026	5,001-10,000	6,113 contacts →
	Exact match “Terracon is a 100 percent employee-owned consulting engineering firm providing quality services to clients.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
2	Deme Group	Exact match	Beveren-kruibeke-zwijndrecht, BelgiumHQ recorded Sep 28, 2026	5,001-10,000	4,395 contacts →
	Exact match “DEME (Euronext Brussels: DEME) is a leading contractor in the fields of offshore energy, dredging and marine infrastructure, and environmental remediation.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
3	VAN Oord	Exact match	3063 Nh, NetherlandsHQ recorded Sep 28, 2026	5,001-10,000	4,364 contacts →
	Exact match “Van Oord is a leading international marine contractor focusing on dredging, infrastructure and offshore energy projects.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
4	Golder	Exact match	Vancouver, BC, CanadaHQ recorded Sep 28, 2026	5,001-10,000	3,167 contacts →
	Exact match “Golder was acquired by WSP.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
5	Bram Offshore	Exact match	Rio De Janeiro, BrazilHQ recorded Sep 28, 2026	1,001-5,000	2,922 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
6	Brown And Caldwell	Exact match	Walnut Creek, CA, United StatesHQ recorded Sep 28, 2026	1,001-5,000	2,473 contacts →
	Exact match “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.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
7	Geosyntec Consultants	Exact match	Boca Raton, FL, United StatesHQ recorded Sep 28, 2026	1,001-5,000	2,393 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
8	Zamil Offshore Services Company	Exact match	Al-khobar, Saudi ArabiaHQ recorded Sep 28, 2026	1,001-5,000	2,312 contacts →
	Exact match “Zamil Offshore Services Company has been offering diversified offshore and marine support services to the oil and gas industry since 1977.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
9	Free Lancer	Exact match	BrazilHQ recorded Sep 28, 2026	n/a	2,224 contacts →
	Exact match “Rov company.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
10	Executive Ship Management	Exact match	SingaporeHQ recorded Sep 28, 2026	5,001-10,000	1,915 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
11	Grupo CBO	Exact match	Niterói, BrazilHQ recorded Sep 28, 2026	1,001-5,000	1,847 contacts →
	Exact match “O Grupo CBO é uma das maiores empresas de apoio marítimo do Brasil.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
12	Swca Environmental Consultants	Exact match	Phoenix, AZ, United StatesHQ recorded Sep 28, 2026	1,001-5,000	1,629 contacts →
	Exact match “Founded on a commitment to sound science and creative solutions, SWCA is a leader in environmental and management consulting services.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
13	Montrose Environmental Group	Exact match	Little Rock, AR, United StatesHQ recorded Sep 28, 2026	1,001-5,000	1,529 contacts →
	Exact match “Onterris (formerly Montrose Environmental Group) was one of the first to see environmental responsibility as not just an imperative but as a strategic asset.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
14	DHI	Exact match	Hørsholm, DenmarkHQ recorded Sep 28, 2026	1,001-5,000	1,427 contacts →
	Exact match “There is no substitute for water.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
15	Maersk Supply Service	Exact match	Rio De Janeiro, BrazilHQ recorded Sep 28, 2026	201-500	1,407 contacts →
	Exact match “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.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
16	Wallem Group	Exact match	Hong KongHQ recorded Sep 28, 2026	501-1,000	1,313 contacts →
	Exact match “First established in Shanghai in 1903, Wallem Group has a 120-year maritime heritage with a presence in 19 countries globally.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
17	DGE Danmark	Exact match	Højbjerg, DenmarkHQ recorded Sep 28, 2026	n/a	1,176 contacts →
	Exact match “Miljø er vores kernekompetence og vores ansvar.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
18	Verdantas	Exact match	Tampa, FL, United StatesHQ recorded Sep 28, 2026	1,001-5,000	1,139 contacts →
	Exact match “At Verdantas, we blend engineering and environmental science together with advanced technology and world-renowned labs to create solutions with the big picture in mind.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
19	Apex Companies	Exact match	Rockville, MD, United StatesHQ recorded Sep 28, 2026	1,001-5,000	1,137 contacts →
	Exact match “Who is Apex?” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
20	Philippine Transmarine Carriers, INC	Exact match	Makati City, PhilippinesHQ recorded Sep 28, 2026	501-1,000	1,102 contacts →
	Exact match “People at the heart.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
21	Barr Engineering CO	Exact match	Minneapolis, MN, United StatesHQ recorded Sep 28, 2026	1,001-5,000	1,088 contacts →
	Exact match “Barr provides engineering and environmental consulting services to clients across the Midwest, throughout the Americas, and around the world.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
22	Shearwater Geoservices	Exact match	Laksevåg, NorwayHQ recorded Sep 28, 2026	1,001-5,000	1,031 contacts →
	Exact match “Shearwater is a global marine geoscience and technology business.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
23	WSP EN Chile	Exact match	Vitacura, ChileHQ recorded Sep 28, 2026	10001+	988 contacts →
	Exact match “WSP en una empresa líder en servicios profesionales de consultoría en recursos hídricos, ingeniería, medio ambiente y sustentabilidad.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
24	Trinity Consultants	Exact match	Dallas, TX, United StatesHQ recorded Sep 28, 2026	1,001-5,000	961 contacts →
	Exact match “Trinity Consultants is a global team of experts helping organizations solve complex challenges in environmental compliance, ecological protection, infrastructure performance, and…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
25	Alliance Technical Group	Exact match	Decatur, AL, United StatesHQ recorded Sep 28, 2026	1,001-5,000	956 contacts →
	Exact match “Alliance is a new kind of environmental services company-powered by innovation, focused on service, and committed to client success.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “marine environmental consulting firms”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 18,100 marine environmental consulting firms worldwide

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Marine environmental consulting firms worldwide at a glance

As of Sep 28, 2026

28.6%Verified-email coverage

16.0Average contacts per company

1-10Median size (employees)

1.2%Largest-city concentration · Singapore

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

10,378

11-50

5,435

51-200

1,550

201-500

413

501-1,000

123

1,001-5,000

5,001-10,000

10001+

Email recency is reported on each country list linked below.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
Coverage: Every country. Country and city lists for marine environmental consulting firms are linked below.
What qualifies: Company records worldwide whose business descriptions match “marine environmental consulting firms” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 82,856 professional contacts with verified work emails across the full matched dataset. 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 28, 2026. Lists refresh periodically as the graph is re-checked.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Marine environmental consulting firms by location

88 lists · largest first

Every Marine environmental 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 SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “marine environmental consulting firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many marine environmental consulting firms are there worldwide?

RevenueBase identified 18,100 company matches for marine environmental consulting firms worldwide as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Terracon tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which country has the most marine environmental consulting firms?

The United States leads with 3,248 companies, followed by Brazil (1,769) and the United Kingdom (984). Every marine environmental consulting firms list by country and city is linked on this page.

Which city has the most marine environmental consulting firms?

Singapore leads with 221 company records, followed by Rio De Janeiro (158) and Sao Paulo (157).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 82,856 professional contacts with verified work emails tracked across these 18,100 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 28, 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 SmartSearch, 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.