Company lists · Data refreshed September 2026

Top 25 Maritime consulting firms based in the United States

Name: Maritime 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 1,010 companies tracked

RevenueBase identified 1,010 maritime consulting firms headquartered in the United States as of September 2026 and tracks 11,626 professional contacts across them, including 3,632 with verified work emails and 4,377 with mobile numbers. Houston is the largest hub.

This list covers maritime 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, how directly it supports the match, 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 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 HQ checked on every row Match evidence on every row Refreshed Sep 5, 2026 86% judged on-target in blind review

1,010Companies

11,626Contacts tracked

3,632Verified emails

4,377Mobile numbers

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The 25 largest maritime consulting firms based in the United States

Ranked by team size

Top 25 of 1,010 maritime consulting firms based in the United States, ranked by team size, largest first. Data refreshed Sep 5, 2026. Evidence rates how directly each company's own description names maritime consulting firms: strong (names it), partial (names part of it), indirect (matched on its full profile rather than the summary shown). Click a count to unlock that company's people.
#	Company	Headquarters	Employees	Contacts
1	Foss Maritime CompanyPartial evidence	Seattle, WA, United StatesHQ checked Sep 5, 2026	501-1,000	531
	“Foss Maritime provides comprehensive marine transportation and logistics services.” Source: company website · checked Sep 5, 2026
2	Leidos Gibbs & COXPartial evidence	Arlington, VA, United StatesHQ checked Sep 5, 2026	201-500	394
	“Leidos Gibbs & Cox is an engineering and design firm specializing naval architecture, marine engineering, and consulting engineering.” Source: company website · checked Sep 5, 2026
3	The Vane Brothers CompanyPartial evidence	Baltimore, MD, United StatesHQ checked Sep 5, 2026	501-1,000	363
	“The Vane Brothers Company has served the maritime industry for more than 125 years, providing a wide range of services that includes ship bunkering and lightering; the delivery of…” Source: company website · checked Sep 5, 2026
4	Global Diving & Salvage, INCIndirect evidence	Seattle, WA, United StatesHQ checked Sep 5, 2026	201-500	217
	“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: company website · checked Sep 5, 2026
5	Curtin Maritime, CorpPartial evidence	Long Beach, CA, United StatesHQ checked Sep 5, 2026	201-500	178
	“Curtin Maritime is an American-owned and operated marine solutions company, committed to innovation, efficiency, and integrity across every element of maritime operations.” Source: company website · checked Sep 5, 2026
6	HMM AmericaIndirect evidence	Irving, TX, United StatesHQ checked Sep 5, 2026	1,001-5,000	171
	“Hyundai Merchant Marine (HMM) is a leading global shipping company operating over 130 state-of-the-art vessels encompassing more than 50 sea routes to over 100 ports of call.” Source: company website · checked Sep 5, 2026
7	Bellingham MarineIndirect evidence	Jacksonville, FL, United StatesHQ checked Sep 5, 2026	201-500	163
	“Bellingham Marine is an established leader in the marine construction world.” Source: company website · checked Sep 5, 2026
8	Signet Maritime CorporationPartial evidence	Houston, TX, United StatesHQ checked Sep 5, 2026	201-500	153
	“Signet Maritime Corporation is a diverse international marine transportation and logistics services company.” Source: company website · checked Sep 5, 2026
9	Patriot MaritimePartial evidence	Concord, CA, United StatesHQ checked Sep 5, 2026	11-50	138
	“Patriot Maritime is a leading maritime contractor to the U.S.” Source: company website · checked Sep 5, 2026
10	ABS WavesightPartial evidence	Spring, TX, United StatesHQ checked Sep 5, 2026	201-500	125
	“ABS Wavesight™ is a maritime software-as-a-service (SaaS) company, built on the foundation of ABS, one of the world's leading ship classification organizations with a 160+ year…” Source: company website · checked Sep 5, 2026
11	Reinauer Transportation Companies, LLCPartial evidence	Staten Island, United StatesHQ checked Sep 5, 2026	501-1,000	124
	“Reinauer Transportation Companies is a leader in the maritime industry.” Source: company website · checked Sep 5, 2026
12	Lanier & Associates Consulting Engineers, INCIndirect evidence	New Orleans, LA, United StatesHQ checked Sep 5, 2026	51-200	122
	“Lanier & Associates is a multi-disciplined engineering firm that specializes in industrial marine projects with civil, structural, mechanical, electrical and instrumentation…” Source: company website · checked Sep 5, 2026
13	Stabbert MaritimePartial evidence	Seattle, WA, United StatesHQ checked Sep 5, 2026	201-500	119
	“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: company website · checked Sep 5, 2026
14	Marine Systems Corporation MscorpIndirect evidence	Boston, MA, United StatesHQ checked Sep 5, 2026	51-200	116
	“MSCorp is a privately held Small Business specializing in marine engineering, design, logistical, planning & maintenance support, and computer oriented support to the United…” Source: company website · checked Sep 5, 2026
15	GlostenIndirect evidence	Seattle, WA, United StatesHQ checked Sep 5, 2026	51-200	104
	“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: company website · checked Sep 5, 2026
16	Terminal Security Solutions, INCIndirect evidence	Long Beach, CA, United StatesHQ checked Sep 5, 2026	501-1,000	103
	“TSS is a private security firm specializing in customer service, partnership focused cruise terminal, cargo facility and port authority security services, as well as crew…” Source: company website · checked Sep 5, 2026
17	Ocean Associates, INCPartial evidence	Arlington, VA, United StatesHQ checked Sep 5, 2026	51-200	100
	“OAI provides professional consulting services to government organizations, the private sector, academia, and UN agencies.” Source: company website · checked Sep 5, 2026
18	Mcquilling Partners, INCIndirect evidence	New York, NY, United StatesHQ checked Sep 5, 2026	51-200	96
	Source: company website · checked Sep 5, 2026
19	Thomas Quinn, LLPIndirect evidence	San Francisco, CA, United StatesHQ checked Sep 5, 2026	11-50	89
	“Thomas Quinn, LLP is founded on the principles of honesty and accountability.” Source: company website · checked Sep 5, 2026
20	East Coast Repair & Fabrication, LLCIndirect evidence	Newport News, VA, United StatesHQ checked Sep 5, 2026	51-200	88
	“East Coast Repair and Fabrication (ECR) has been a leading force in the marine, industrial and commercial sectors since We have an established and proven track record with the…” Source: company website · checked Sep 5, 2026
21	Moran Shipping AgenciesIndirect evidence	Providence, RI, United StatesHQ checked Sep 5, 2026	51-200	87
	“Moran Shipping Agencies, Inc is a family owned business that began operations in 1937 and has since grown to become the largest privately owned vessel agency in the United States.” Source: company website · checked Sep 5, 2026
22	Seaport AgenciesIndirect evidence	Miami, FL, United StatesHQ checked Sep 5, 2026	51-200	87
	“Welcome to Seaport Agencies, a privately owned shipping agency company established in 1998.” Source: company website · checked Sep 5, 2026
23	AMI InternationalIndirect evidence	Bremerton, WA, United StatesHQ checked Sep 5, 2026	11-50	83
	“Proven Edge in the Global Naval Market A.” Source: company website · checked Sep 5, 2026
24	Cummins CederbergIndirect evidence	Coral Gables, FL, United StatesHQ checked Sep 5, 2026	51-200	82
	“Cummins Cederberg is a leader in coastal and marine engineering, delivering solutions for some of the most complex and high-impact waterfront projects.” Source: company website · checked Sep 5, 2026
25	Elliott BAY Design GroupIndirect evidence	Seattle, WA, United StatesHQ checked Sep 5, 2026	51-200	80
	“Elliott Bay Design Group (EBDG) is a full-service, employee-owned naval architecture and marine engineering firm that supports owners, operators and shipyards.” Source: company website · checked Sep 5, 2026

Showing 25 of 1,010 maritime consulting firms based in the United States

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Maritime consulting firms based in the United States at a glance

As of Sep 5, 2026

1-10Median size (employees)

HoustonLargest hub · 62 HQs

4,377Contacts with mobile numbers

Sep 5, 2026Data refreshed

Companies by employee count

1-10

605

11-50

281

51-200

201-500

501-1,000

1,001-5,000

10001+

Verified emails by last verification

0–30

3,374

31–60

223

61–90

90–180

180+

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 consulting firms, so some rows will be adjacent to the category rather than pure plays. The description and evidence 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 SmartSearch, 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 consulting firms”. Matching reads each company's description, not its industry code or its name.
What we exclude: Companies whose own description does not clearly place them among maritime 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 an evidence 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, 3,632 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.

Maritime consulting firms by metro

Frequently asked

How many maritime consulting firms are there based in the United States?

RevenueBase identified 1,010 maritime 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?

Foss Maritime Company, headquartered in Seattle, tops this list with the largest team on record.

Which city has the most maritime consulting firms?

Houston leads with 62 headquartered companies, followed by Miami (48) and Fort Lauderdale (45).

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 3,632 verified decision-maker contacts tracked across these 1,010 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 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.