Company lists · Data refreshed September 2026

Top 25 Maritime engineering consultants based in the United States

Name: Maritime engineering consultants based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 17, 2026 4,128 companies tracked

RevenueBase identified 4,128 maritime engineering consultants headquartered in the United States as of September 2026 and tracks 301,264 professional contacts across them, including 128,978 with verified work emails. Houston is the largest hub.

This list covers maritime engineering consultants 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 17, 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 17, 2026 86% judged on-target in blind review

4,128Companies

301,264Contacts tracked

128,978Verified emails

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The 25 largest maritime engineering consultants based in the United States

Ranked by team size

Top 25 of 4,128 maritime engineering consultants based in the United States, ranked by team size, largest first. Data refreshed Sep 17, 2026. RevenueBase Smart Search rates how each company's information relates to maritime engineering consultants: 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	AECOM	Indirect evidence	Dallas, TX, United StatesHQ checked Sep 17, 2026	10001+	63,914 contacts →
	Indirect evidence “AECOM is the global infrastructure leader, committed to delivering a better world.” Source: RevenueBase Database · checked Sep 17, 2026
2	Tetra Tech	Partial evidence	Pasadena, CA, United StatesHQ checked Sep 17, 2026	10001+	12,999 contacts →
	Partial 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	URS Corporation, An Aecom Company	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 17, 2026	10001+	7,706 contacts →
	Indirect evidence “URS Corporation operations are now affiliated with AECOM.” Source: RevenueBase Database · checked Sep 17, 2026
4	CDM Smith	Indirect evidence	Boston, MA, United StatesHQ checked Sep 17, 2026	5,001-10,000	7,527 contacts →
	Indirect evidence “CDM Smith is shaping what’s next, now, with world class solutions in water, environment, transportation and energy to public and private clients worldwide.” Source: RevenueBase Database · checked Sep 17, 2026
5	Terracon	Partial evidence	Olathe, KS, United StatesHQ checked Sep 17, 2026	5,001-10,000	6,113 contacts →
	Partial evidence “Terracon is a 100 percent employee-owned consulting engineering firm providing quality services to clients.” Source: RevenueBase Database · checked Sep 17, 2026
6	Michael Baker International	Partial evidence	Pittsburgh, PA, United StatesHQ checked Sep 17, 2026	5,001-10,000	4,362 contacts →
	Partial evidence “Michael Baker International is a leading provider of engineering, consulting, and technology services spanning four Verticals: Infrastructure, Places and Facilities, Federal and…” Source: RevenueBase Database · checked Sep 17, 2026
7	Power Engineers	Indirect evidence	Hailey, ID, United StatesHQ checked Sep 17, 2026	1,001-5,000	4,013 contacts →
	Indirect evidence “POWER Engineers is now part of WSP.” Source: RevenueBase Database · checked Sep 17, 2026
8	STV	Indirect evidence	New York, NY, United StatesHQ checked Sep 17, 2026	1,001-5,000	3,556 contacts →
	Indirect evidence “STV offers professional services for the infrastructure that powers our lives.” Source: RevenueBase Database · checked Sep 17, 2026
9	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
10	Geosyntec Consultants	Partial evidence	Boca Raton, FL, United StatesHQ checked Sep 17, 2026	1,001-5,000	2,393 contacts →
	Partial 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
11	ECS Group Of Companies	Partial evidence	Chantilly, VA, United StatesHQ checked Sep 17, 2026	1,001-5,000	2,210 contacts →
	Partial evidence “ECS Group of Companies is a Chantilly, VA-based consulting engineering firm.” Source: RevenueBase Database · checked Sep 17, 2026
12	KCI	Partial evidence	Sparks, NC, United StatesHQ checked Sep 17, 2026	1,001-5,000	2,207 contacts →
	Partial evidence “KCI is a 100-percent employee-owned engineering, consulting and construction firm serving clients throughout the United States and beyond.” Source: RevenueBase Database · checked Sep 17, 2026
13	Olsson	Partial evidence	Lincoln, NE, United StatesHQ checked Sep 17, 2026	1,001-5,000	2,108 contacts →
	Partial evidence “Olsson is an engineering firm made up of people who craft expert solutions and designs that improve communities.” Source: RevenueBase Database · checked Sep 17, 2026
14	Colliers Engineering & Design	Partial evidence	Holmdel, NJ, United StatesHQ checked Sep 17, 2026	1,001-5,000	2,049 contacts →
	Partial evidence “Colliers Engineering & Design, an affiliate of Colliers, is a trusted provider of multi-discipline engineering and architecture, design and consulting services to public and…” Source: RevenueBase Database · checked Sep 17, 2026
15	IMEG	Partial evidence	Rock Island, IL, United StatesHQ checked Sep 17, 2026	1,001-5,000	1,985 contacts →
	Partial evidence “Leaders in Engineering and Innovation.” Source: RevenueBase Database · checked Sep 17, 2026
16	LJA	Indirect evidence	Houston, TX, United StatesHQ checked Sep 17, 2026	1,001-5,000	1,932 contacts →
	Indirect evidence “Employee-Owned.” Source: RevenueBase Database · checked Sep 17, 2026
17	JMT	Indirect evidence	Serving Clients Across The Us, MD, United StatesHQ checked Sep 17, 2026	1,001-5,000	1,688 contacts →
	Indirect evidence “Johnson, Mirmiran & Thompson is an employee owned, multi-disciplined firm offering a full array of planning, design, and construction phase consulting services for infrastructure…” Source: RevenueBase Database · checked Sep 17, 2026
18	Bowman Consulting	Partial evidence	Reston, VA, United StatesHQ checked Sep 17, 2026	1,001-5,000	1,666 contacts →
	Partial evidence “Headquartered in Reston, Virginia, Bowman is a national engineering services firm delivering infrastructure solutions to customers who own, develop and maintain the built…” Source: RevenueBase Database · checked Sep 17, 2026
19	CHA Consulting, INC	Partial evidence	Albany, NY, United StatesHQ checked Sep 17, 2026	1,001-5,000	1,639 contacts →
	Partial evidence “CHA Consulting, Inc.(CHA) is an innovative, full-service engineering, design, consulting, and program/construction management firm providing a wide range of technology-enhanced…” Source: RevenueBase Database · checked Sep 17, 2026
20	GEI Consultants, INC	Indirect evidence	Woburn, MA, United StatesHQ checked Sep 17, 2026	1,001-5,000	1,604 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 17, 2026
21	UES	Partial evidence	Orlando, FL, United StatesHQ checked Sep 17, 2026	1,001-5,000	1,595 contacts →
	Partial evidence “UES provides professional engineering, environmental, testing and inspection services to clients across the United States.” Source: RevenueBase Database · checked Sep 17, 2026
22	Garver	Partial evidence	North Little Rock, AR, United StatesHQ checked Sep 17, 2026	1,001-5,000	1,499 contacts →
	Partial evidence “Founded in 1919, Garver is an employee-owned engineering, planning, and environmental services firm focused on aviation, transportation, buildings, federal, water and wastewater…” Source: RevenueBase Database · checked Sep 17, 2026
23	Kpff Consulting Engineers	Partial evidence	Seattle, WA, United StatesHQ checked Sep 17, 2026	1,001-5,000	1,487 contacts →
	Partial evidence “KPFF is a multi-office, multi-discipline engineering firm.” Source: RevenueBase Database · checked Sep 17, 2026
24	Labella Associates	Indirect evidence	Rochester, NY, United StatesHQ checked Sep 17, 2026	1,001-5,000	1,459 contacts →
	Indirect evidence “At LaBella Associates, our job is to create – structures, plans, ideas, results.” Source: RevenueBase Database · checked Sep 17, 2026
25	Davey Resource Group, INC	Indirect evidence	Kent, OH, United StatesHQ checked Sep 17, 2026	1,001-5,000	1,395 contacts →
	Indirect evidence “Davey Resource Group, Inc.(DRG) provides innovative consulting and field services that support utility infrastructure and environmental stewardship.” 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: maritime engineering consultants. 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 maritime engineering consultants.
Partial evidence: Its own public description names part of maritime engineering consultants, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name maritime engineering consultants. 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 4,128 maritime engineering consultants based in the United States

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Maritime engineering consultants based in the United States at a glance

As of Sep 17, 2026

42.8%Verified-email coverage

73.0Average contacts per company

11-50Median size (employees)

4.1%Largest-city concentration · Houston

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

1,706

11-50

1,464

51-200

644

201-500

146

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 4,128 companies.

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 maritime engineering consultants, 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 “maritime engineering consultants”. 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 maritime engineering consultants), 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 maritime engineering consultants, 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, 128,978 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.

Maritime engineering consultants 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 maritime engineering consultants, 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 maritime engineering consultants are there based in the United States?

RevenueBase identified 4,128 maritime engineering consultants 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?

AECOM, headquartered in Dallas, tops this list with the largest team on record.

Which city has the most maritime engineering consultants?

Houston leads with 171 headquartered companies, followed by New York (79) and Miami (63).

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 128,978 verified decision-maker contacts tracked across these 4,128 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.