Company lists · Data refreshed September 2026

Top 25 Maritime compliance consulting firms based in the United States

Name: Maritime compliance 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 519 companies tracked

RevenueBase identified 519 maritime compliance consulting firms headquartered in the United States as of September 2026 and tracks 5,687 professional contacts across them, including 1,579 with verified work emails and 2,078 with mobile numbers. Houston is the largest hub.

This list covers maritime compliance 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

519Companies

5,687Contacts tracked

1,579Verified emails

2,078Mobile numbers

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The 25 largest maritime compliance consulting firms based in the United States

Ranked by team size

Top 25 of 519 maritime compliance 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 maritime compliance 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	Leidos Gibbs & COX	Partial evidence	Arlington, VA, United StatesHQ checked Sep 5, 2026	201-500	394 contacts →
	Partial evidence “Leidos Gibbs & Cox is an engineering and design firm specializing naval architecture, marine engineering, and consulting engineering.” Source: RevenueBase Database · checked Sep 5, 2026
2	Drew Marine	Strong evidence	Waterbury, CT, United StatesHQ checked Sep 5, 2026	201-500	304 contacts →
	Strong evidence “Drew Marine is a global leader in maritime water treatment, fuel management, refrigerant compliance, cleaning solutions, and technical services trusted by ship owners, operators…” Source: RevenueBase Database · checked Sep 5, 2026
3	CGI Coastal Gulf & International	Indirect evidence	Saint Rose, LA, United StatesHQ checked Sep 5, 2026	201-500	130 contacts →
	Indirect evidence “Since 1978, Coastal Gulf & International, Inc.(CGI) has been a trusted leader in independent inspection, testing, and technical services for the energy, petrochemical, and marine…” Source: RevenueBase Database · checked Sep 5, 2026
4	International Register Of Shipping	Indirect evidence	Miami, FL, United StatesHQ checked Sep 5, 2026	51-200	112 contacts →
	Indirect evidence “Established in 1993, the International Register of Shipping (INTLREG) is an independent classification society working with the objective of safeguarding life, property and the…” Source: RevenueBase Database · checked Sep 5, 2026
5	Glosten	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 5, 2026	51-200	104 contacts →
	Indirect 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
6	Terminal Security Solutions, INC	Indirect evidence	Long Beach, CA, United StatesHQ checked Sep 5, 2026	501-1,000	103 contacts →
	Indirect evidence “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: RevenueBase Database · checked Sep 5, 2026
7	Mcquilling Partners, INC	Indirect evidence	New York, NY, United StatesHQ checked Sep 5, 2026	51-200	96 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 5, 2026
8	BC Service	Indirect evidence	Miami, FL, United StatesHQ checked Sep 5, 2026	51-200	90 contacts →
	Indirect evidence “BC Service has been committed to Safety of Life at Sea for over 70 years as an LSA Service Provider and Manufacturer; besides its lead role in LSA, BC Service continues to develop…” Source: RevenueBase Database · checked Sep 5, 2026
9	Thomas Quinn, LLP	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 5, 2026	11-50	89 contacts →
	Indirect evidence “Thomas Quinn, LLP is founded on the principles of honesty and accountability.” Source: RevenueBase Database · checked Sep 5, 2026
10	Moran Shipping Agencies	Indirect evidence	Providence, RI, United StatesHQ checked Sep 5, 2026	51-200	87 contacts →
	Indirect evidence “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: RevenueBase Database · checked Sep 5, 2026
11	BSI Consulting	Partial evidence	Herndon, VA, United StatesHQ checked Sep 5, 2026	1,001-5,000	84 contacts →
	Partial evidence “BSI Consulting offers comprehensive world-class solutions in environmental, health, safety (EHS), supply chain security, and sustainability.” Source: RevenueBase Database · checked Sep 5, 2026
12	Cummins Cederberg	Indirect evidence	Coral Gables, FL, United StatesHQ checked Sep 5, 2026	51-200	82 contacts →
	Indirect evidence “Cummins Cederberg is a leader in coastal and marine engineering, delivering solutions for some of the most complex and high-impact waterfront projects.” Source: RevenueBase Database · checked Sep 5, 2026
13	Elliott BAY Design Group	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 5, 2026	51-200	80 contacts →
	Indirect evidence “Elliott Bay Design Group (EBDG) is a full-service, employee-owned naval architecture and marine engineering firm that supports owners, operators and shipyards.” Source: RevenueBase Database · checked Sep 5, 2026
14	Baker Marine Solutions, LLC	Partial evidence	Covington, LA, United StatesHQ checked Sep 5, 2026	11-50	76 contacts →
	Partial evidence “Baker Marine Solutions is a leading provider of marine assurance, engineering and consulting services, performing DP assurance, OCIMF- OVID inspections, IMCA CMID inspections…” Source: RevenueBase Database · checked Sep 5, 2026
15	Capital Ship Solutions - CSS	Indirect evidence	Miami, FL, United StatesHQ checked Sep 5, 2026	51-200	64 contacts →
	Indirect evidence “Capital Ship Solutions provides expert Technical, Engineering and Management Consultancy for diverse stakeholders in the Shipping and Offshore sectors.” Source: RevenueBase Database · checked Sep 5, 2026
16	Athens Group Services	Indirect evidence	Houston, TX, United StatesHQ checked Sep 5, 2026	11-50	56 contacts →
	Indirect evidence “Athens Group Services is a comprehensive global provider of performance and safety assurance services to assist the offshore energy and marine industries design, construct, and…” Source: RevenueBase Database · checked Sep 5, 2026
17	Entrion	Indirect evidence	Houston, TX, United StatesHQ checked Sep 5, 2026	51-200	55 contacts →
	Indirect evidence “Entrion provides value-driven services and support that resolve equipment safety and quality challenges in the offshore industry to manufacturers, drilling contractors, and…” Source: RevenueBase Database · checked Sep 5, 2026
18	Maritech Commercial	Partial evidence	Kenner, LA, United StatesHQ checked Sep 5, 2026	51-200	52 contacts →
	Partial evidence “MARiTECH Commercial, LLC and its subsidiary companies and partners provide maritime consultancy services to maximize value and minimize lost time for clients.” Source: RevenueBase Database · checked Sep 5, 2026
19	Hepburn And Sons LLC	Indirect evidence	Manassas, VA, United StatesHQ checked Sep 5, 2026	51-200	52 contacts →
	Indirect evidence “Founded in 2010, Hepburn and Sons LLC, in the Commonwealth of Virginia as an S-Corp Small Business, our focus is in naval engineering and architecture.” Source: RevenueBase Database · checked Sep 5, 2026
20	Gallagher Marine Systems - LLC	Partial evidence	Moorestown Township, NJ, United StatesHQ checked Sep 5, 2026	51-200	49 contacts →
	Partial evidence “Gallagher Marine Systems (GMS) is the industry’s most comprehensive source of full-service, in-depth, compliance support.” Source: RevenueBase Database · checked Sep 5, 2026
21	Alliance Infinite	Indirect evidence	New York, United StatesHQ checked Sep 5, 2026	1,001-5,000	48 contacts →
	Indirect evidence “Alliance Infinite has consistently maintained its position among the world’s very best quality service providers for Third Party Inspection, Testing, Calibration and Management…” Source: RevenueBase Database · checked Sep 5, 2026
22	Ergonav Group	Partial evidence	New York, United StatesHQ checked Sep 5, 2026	501-1,000	45 contacts →
	Partial evidence “ERGONAV GROUP is an International privately-owned Corporation active in the Maritime Sector, focusing on Environmental Testing & Inspections.” Source: RevenueBase Database · checked Sep 5, 2026
23	TBS Safety	Partial evidence	Daphne, AL, United StatesHQ checked Sep 5, 2026	11-50	45 contacts →
	Partial evidence “TBS Safety is your trusted partner in building safer, stronger operations across the maritime industry and beyond.” Source: RevenueBase Database · checked Sep 5, 2026
24	Sabine Surveyors, LTD	Partial evidence	Metairie, LA, United StatesHQ checked Sep 5, 2026	51-200	41 contacts →
	Partial evidence “Since 1968, Sabine Surveyors has provided the maritime industry with a wide array of services through our highly trained, educated, competent, and dedicated staff of marine…” Source: RevenueBase Database · checked Sep 5, 2026
25	J Connor Consulting, INC	Indirect evidence	Houston, TX, United StatesHQ checked Sep 5, 2026	51-200	39 contacts →
	Indirect evidence “The Company J.” 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: maritime compliance 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 maritime compliance consulting firms.
Partial evidence: Its own public description names part of maritime compliance consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name maritime compliance 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 519 maritime compliance consulting firms based in the United States

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Maritime compliance consulting firms based in the United States at a glance

As of Sep 5, 2026

27.8%Verified-email coverage

36.5%Mobile-number coverage

11.0Average contacts per company

1-10Median size (employees)

7.3%Largest-city concentration · Houston

Sep 5, 2026Page data refreshed

Companies by employee count

1-10

318

11-50

145

51-200

201-500

501-1,000

1,001-5,000

Freshness & accuracy

How recently the business emails on this list were verified

Email last verified

1,4630–30

10231–60

061–90

090–180

14180+

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 compliance 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 “maritime compliance 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 maritime compliance 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 maritime compliance 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, 1,579 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 compliance consulting firms by metro

Maritime compliance consulting firms in Houston38

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 compliance 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 maritime compliance consulting firms are there based in the United States?

RevenueBase identified 519 maritime compliance 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?

Leidos Gibbs & COX, headquartered in Arlington, tops this list with the largest team on record.

Which city has the most maritime compliance consulting firms?

Houston leads with 38 headquartered companies, followed by Miami (24) and Fort Lauderdale (19).

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 1,579 verified decision-maker contacts tracked across these 519 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.