Company lists · Data refreshed September 2026

Top 25 Marine resource consulting firms based in the United States

Name: Marine resource consulting firms based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 5, 2026 1,243 companies tracked

RevenueBase identified 1,243 marine resource consulting firms headquartered in the United States as of September 2026 and tracks 17,796 professional contacts across them, including 7,803 with verified work emails and 7,973 with mobile numbers. Houston is the largest hub.

This list covers marine resource consulting firms headquartered in the United States, 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 5, 2026.

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 5, 2026 86% judged on-target in blind review

1,243Companies

17,796Contacts tracked

7,803Verified emails

7,973Mobile numbers

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The 25 largest marine resource consulting firms based in the United States

Ranked by team size

Top 25 of 1,243 marine resource consulting firms based in the United States, ranked by team size, largest first. Data refreshed Sep 5, 2026. RevenueBase Smart Search rates how each company's information relates to marine resource 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	Swca Environmental Consultants	Partial evidence	Phoenix, AZ, United StatesHQ checked Sep 5, 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 5, 2026
2	Environmental Science Associates	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 5, 2026	501-1,000	732 contacts →
	Partial evidence “ESA is a 100% employee-owned environmental consulting firm.” Source: RevenueBase Database · checked Sep 5, 2026
3	Anchor QEA	Partial evidence	Seattle, WA, United StatesHQ checked Sep 5, 2026	501-1,000	479 contacts →
	Partial evidence “Headquartered in Seattle, Washington, Anchor QEA is a nationally recognized environmental science and engineering consulting firm specializing in aquatic, shoreline, and water…” Source: RevenueBase Database · checked Sep 5, 2026
4	Rincon Consultants	Partial evidence	Ventura, CA, United StatesHQ checked Sep 5, 2026	501-1,000	479 contacts →
	Partial evidence “Rincon Consultants is a multi-disciplinary environmental sciences, planning, and engineering consulting firm that provides quality professional services to government and industry.” Source: RevenueBase Database · checked Sep 5, 2026
5	Groundwater & Environmental Services, INC	Indirect evidence	Wall Township, NJ, United StatesHQ checked Sep 5, 2026	201-500	447 contacts →
	Indirect evidence “We are Groundwater & Environmental Services, Inc, better known as GES.” Source: RevenueBase Database · checked Sep 5, 2026
6	Environmental Consulting & Technology, Inc. ECT	Partial evidence	Gainesville, FL, United StatesHQ checked Sep 5, 2026	201-500	305 contacts →
	Partial evidence “Environmental Consulting & Technology, Inc.(ECT) is a multi-disciplinary environmental and sustainability consulting firm delivering strategy, permitting, design, and management…” Source: RevenueBase Database · checked Sep 5, 2026
7	Imia, LLC	Partial evidence	Chesapeake, VA, United StatesHQ checked Sep 5, 2026	1,001-5,000	293 contacts →
	Partial evidence “Founded in 1985 and a distinguished part of ARMADA Parent Inc, established itself as a premier marine preservation company, delivering an extensive suite of services to…” Source: RevenueBase Database · checked Sep 5, 2026
8	Resolve Marine	Partial evidence	Fort Lauderdale, FL, United StatesHQ checked Sep 5, 2026	51-200	277 contacts →
	Partial evidence “Resolve Marine, a global leader in vessel salvage, emergency response, compliance and specialized marine services, has served and supported clients and projects for 40 years.” Source: RevenueBase Database · checked Sep 5, 2026
9	Ballard Marine Construction	Partial evidence	Washougal, WA, United StatesHQ checked Sep 5, 2026	51-200	236 contacts →
	Partial evidence “Ballard Marine Construction (Ballard) is a specialty marine and underwater contractor.” Source: RevenueBase Database · checked Sep 5, 2026
10	Global Diving & Salvage, INC	Partial evidence	Seattle, WA, United StatesHQ checked Sep 5, 2026	201-500	217 contacts →
	Partial evidence “Global is a leader in the marine services industry with decades of experience managing complex, critical and technical projects in and around the water.” Source: RevenueBase Database · checked Sep 5, 2026
11	Normandeau Associates, INC	Indirect evidence	Bedford, NH, United StatesHQ checked Sep 5, 2026	201-500	189 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 5, 2026
12	Enviroscience, INC	Indirect evidence	Stow, OH, United StatesHQ checked Sep 5, 2026	51-200	176 contacts →
	Indirect evidence “EnviroScience is a team of over 150 expert biologists, commercial divers, environmental engineers, and environmental scientists that provides biomonitoring, environmental…” Source: RevenueBase Database · checked Sep 5, 2026
13	A.I.S. INC	Partial evidence	North Dartmouth, MA, United StatesHQ checked Sep 5, 2026	201-500	173 contacts →
	Partial evidence “A.I.S, Inc (AIS) supports the stewardship of our nation's ocean resources and their habitats.” Source: RevenueBase Database · checked Sep 5, 2026
14	Phoenix International Holdings, INC	Indirect evidence	Largo, United StatesHQ checked Sep 5, 2026	201-500	170 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 5, 2026
15	Ecorp Consulting, INC	Indirect evidence	Rocklin, CA, United StatesHQ checked Sep 5, 2026	51-200	166 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 5, 2026
16	Mostardi Platt	Indirect evidence	Elmhurst, IL, United StatesHQ checked Sep 5, 2026	51-200	140 contacts →
	Indirect evidence “Since the passage of original environmental legislation nearly four decades ago, both private and public industry have turned to Mostardi Platt for guidance in complying with air…” Source: RevenueBase Database · checked Sep 5, 2026
17	Stabbert Maritime	Partial evidence	Seattle, WA, United StatesHQ checked Sep 5, 2026	201-500	119 contacts →
	Partial evidence “Stabbert Maritime’s group of companies delivers a wide-range of innovative solutions and support services to our offshore, science, subsea energy, and ship repair clients across…” Source: RevenueBase Database · checked Sep 5, 2026
18	SUS	Partial evidence	Baltimore, MD, United StatesHQ checked Sep 5, 2026	11-50	118 contacts →
	Partial evidence “SUS specializes in underwater marine construction including bridges, dams, pipelines, intakes, outfalls, inspection services, piers and wharfs and other public safety and local…” Source: RevenueBase Database · checked Sep 5, 2026
19	Marine Systems Corporation Mscorp	Partial evidence	Boston, MA, United StatesHQ checked Sep 5, 2026	51-200	116 contacts →
	Partial evidence “MSCorp is a privately held Small Business specializing in marine engineering, design, logistical, planning & maintenance support, and computer oriented support to the United…” Source: RevenueBase Database · checked Sep 5, 2026
20	Tdi-Brooks	Indirect evidence	College Station, TX, United StatesHQ checked Sep 5, 2026	51-200	107 contacts →
	Indirect evidence “TDI-Brooks is a 27-year-old research and service company specializing in geotechnical and offshore survey projects; multi-disciplinary oceanographic and environmental projects…” Source: RevenueBase Database · checked Sep 5, 2026
21	Woods Hole Group, INC	Indirect evidence	Bourne, MA, United StatesHQ checked Sep 5, 2026	51-200	105 contacts →
	Indirect evidence “Woods Hole Group brings over 35 years of experience, committed to exceeding client objectives while safeguarding the environmental health of our planet.” Source: RevenueBase Database · checked Sep 5, 2026
22	Techlaw	Partial evidence	Chantilly, VA, United StatesHQ checked Sep 5, 2026	201-500	104 contacts →
	Partial evidence “Established in 1983, TechLaw provides environmental and management consulting services to the public sector nationwide.” Source: RevenueBase Database · checked Sep 5, 2026
23	Glosten	Partial evidence	Seattle, WA, United StatesHQ checked Sep 5, 2026	51-200	104 contacts →
	Partial evidence “Glosten is a full-service naval architecture and marine engineering consultancy with over 65 years of experience successfully taking on one-of-a-kind marine projects.” Source: RevenueBase Database · checked Sep 5, 2026
24	EEE Consulting, Inc. 3e	Partial evidence	Mechanicsville, VA, United StatesHQ checked Sep 5, 2026	11-50	101 contacts →
	Partial evidence “Consulting, Inc.(3e) is a dynamic and progressive certified small business that specializes in environmental studies, environmental engineering, environmental education, and…” Source: RevenueBase Database · checked Sep 5, 2026
25	Ocean Associates, INC	Partial evidence	Arlington, VA, United StatesHQ checked Sep 5, 2026	51-200	100 contacts →
	Partial evidence “OAI provides professional consulting services to government organizations, the private sector, academia, and UN agencies.” Source: RevenueBase Database · checked Sep 5, 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 resource 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 marine resource consulting firms.
Partial evidence: Its own public description names part of marine resource consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name marine resource 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 1,243 marine resource consulting firms based in the United States

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Marine resource consulting firms based in the United States at a glance

As of Sep 5, 2026

43.8%Verified-email coverage

44.8%Mobile-number coverage

14.3Average contacts per company

1-10Median size (employees)

4.1%Largest-city concentration · Houston

Sep 5, 2026Page data refreshed

Companies by employee count

1-10

742

11-50

367

51-200

101

201-500

501-1,000

1,001-5,000

10001+

Freshness & accuracy

How recently the business emails on this list were verified

Email last verified

7,2750–30

48931–60

061–90

090–180

39180+

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 resource 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.
What qualifies: Companies headquartered in the United States whose own description of what they do matches “marine resource 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 marine resource 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 marine resource consulting firms, and records with no verified work email. Companies headquartered outside United States are excluded even when they keep an office there.
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, 7,803 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 5, 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 resource consulting firms by metro

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 resource 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 marine resource consulting firms are there based in the United States?

RevenueBase identified 1,243 marine resource consulting firms headquartered in the United States 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?

Swca Environmental Consultants, headquartered in Phoenix, tops this list with the largest team on record.

Which city has the most marine resource consulting firms?

Houston leads with 51 headquartered companies, followed by Seattle (37) and Miami (27).

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 7,803 verified decision-maker contacts tracked across these 1,243 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 5, 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.