Company lists · Data refreshed September 2026

Top 25 Maritime security compliance firms based in the United States

Name: Maritime security compliance 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 28, 2026 208 companies tracked

RevenueBase identified 208 maritime security compliance firms headquartered in the United States as of September 2026 and tracks 2,426 professional contacts across them, including 545 with verified work emails. Houston is the largest hub.

This list covers maritime security compliance 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 28, 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 28, 2026 86% judged on-target in blind review

208Companies

2,426Contacts tracked

545Verified emails

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

Ranked by team size

Top 25 of 208 maritime security compliance firms based in the United States, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to maritime security compliance 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	American Guard Services, INC	Partial evidence	Gardena, CA, United StatesHQ checked Sep 28, 2026	501-1,000	484 contacts →
	Partial evidence “American Guard Services is an established, reliable and accredited security protection firm.” Source: RevenueBase Database · checked Sep 28, 2026
2	ABS Wavesight	Partial evidence	Spring, TX, United StatesHQ checked Sep 28, 2026	201-500	125 contacts →
	Partial evidence “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: RevenueBase Database · checked Sep 28, 2026
3	International Register Of Shipping	Indirect evidence	Miami, FL, United StatesHQ checked Sep 28, 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 28, 2026
4	Terminal Security Solutions, INC	Partial evidence	Long Beach, CA, United StatesHQ checked Sep 28, 2026	501-1,000	103 contacts →
	Partial 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 28, 2026
5	NCB	Indirect evidence	New York, NY, United StatesHQ checked Sep 28, 2026	51-200	89 contacts →
	Indirect evidence “NCB is an independent, not-for-profit organization dedicated to safeguarding life and cargo through safer, smarter supply chains.” Source: RevenueBase Database · checked Sep 28, 2026
6	BSI Consulting	Partial evidence	Herndon, VA, United StatesHQ checked Sep 28, 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 28, 2026
7	Trident Group America, INC	Strong evidence	Fort Walton Beach, VA, United StatesHQ checked Sep 28, 2026	51-200	65 contacts →
	Strong evidence “Maritime Security Services.” Source: RevenueBase Database · checked Sep 28, 2026
8	Gallagher Marine Systems - LLC	Partial evidence	Moorestown Township, NJ, United StatesHQ checked Sep 28, 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 28, 2026
9	Ergonav Group	Partial evidence	New York, United StatesHQ checked Sep 28, 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 28, 2026
10	TBS Safety	Partial evidence	Daphne, AL, United StatesHQ checked Sep 28, 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 28, 2026
11	Sabine Surveyors, LTD	Partial evidence	Metairie, LA, United StatesHQ checked Sep 28, 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 28, 2026
12	SIX Maritime	Strong evidence	San Diego, CA, United StatesHQ checked Sep 28, 2026	51-200	40 contacts →
	Strong evidence “Six Maritime is a service disabled, veteran-owned maritime security and training company specializing in advanced waterfront protection, autonomous systems integration, and…” Source: RevenueBase Database · checked Sep 28, 2026
13	Westar Marine Services	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 28, 2026	51-200	35 contacts →
	Partial evidence “Westar Marine Services has been catering to the San Francisco Maritime Community since it was founded in 1976.” Source: RevenueBase Database · checked Sep 28, 2026
14	Global Maritek Systems, INC	Indirect evidence	St. Augustine, FL, United StatesHQ checked Sep 28, 2026	51-200	31 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 28, 2026
15	Fathom Resources LLC	Indirect evidence	New Bedford, MA, United StatesHQ checked Sep 28, 2026	11-50	31 contacts →
	Indirect evidence “Fathom Resources (Fathom), is a marine service provider established in 2002 with offices located in New Bedford, Massachusetts and Middletown, Rhode Island.” Source: RevenueBase Database · checked Sep 28, 2026
16	Offshore Technical Compliance LLC	Partial evidence	Covington, LA, United StatesHQ checked Sep 28, 2026	11-50	30 contacts →
	Partial evidence “Offshore Technical Compliance is rapidly positioning itself as the global offshore industry’s leader in supplying compliance-related services.” Source: RevenueBase Database · checked Sep 28, 2026
17	DLS Marine	Indirect evidence	Metairie, LA, United StatesHQ checked Sep 28, 2026	51-200	28 contacts →
	Indirect evidence “DLS Marine is a worldwide marine surveying firm that has served the industry for over 50 years with offices in New Orleans, Houston, Tampa and Norfolk.” Source: RevenueBase Database · checked Sep 28, 2026
18	Commonwealth Trading Partners, INC	Partial evidence	Herndon, VA, United StatesHQ checked Sep 28, 2026	11-50	22 contacts →
	Partial evidence “Global Trade & Security Solutions Excellence in the Public & Private Sector A proud V3-certified company ISOA Women, Peace, and Security Certified Company Since 1993, the experts…” Source: RevenueBase Database · checked Sep 28, 2026
19	Maritime Professional Training	Partial evidence	Fort Lauderdale, FL, United StatesHQ checked Sep 28, 2026	51-200	20 contacts →
	Partial evidence “Founded in 1983, Maritime Professional Training (MPT) is the largest private maritime training school in the United States, serving more than students per year, providing training…” Source: RevenueBase Database · checked Sep 28, 2026
20	Marine Safety Consultants, INC	Indirect evidence	Fairhaven, MA, United StatesHQ checked Sep 28, 2026	11-50	19 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 28, 2026
21	meridian.us	Indirect evidence	Mobile, AL, United StatesHQ checked Sep 28, 2026	51-200	16 contacts →
	Indirect evidence “In 2009, Meridian.us was formed to provide a cost-effective solution to combating piracy.” Source: RevenueBase Database · checked Sep 28, 2026
22	Seaguard Security	Partial evidence	Miami, FL, United StatesHQ checked Sep 28, 2026	51-200	16 contacts →
	Partial evidence “Since March of 2011, Seaguard Security LLC (SGS) has specialized in providing affordable armed security solutions for vessels operating in high-risk waters including the Gulf of…” Source: RevenueBase Database · checked Sep 28, 2026
23	Nielsen Beaumont Marine, INC	Indirect evidence	San Diego, CA, United StatesHQ checked Sep 28, 2026	51-200	15 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 28, 2026
24	Mm-Seas	Partial evidence	Williamsburg, VA, United StatesHQ checked Sep 28, 2026	11-50	13 contacts →
	Partial evidence “MM-SEAS is a team of nearly 30 maritime professionals, credentialing specialists, and engineers working to make USCG licensing something no mariner, office team, or instructor has…” Source: RevenueBase Database · checked Sep 28, 2026
25	Capital Register Of Shipping CRS Class	Partial evidence	Houston, TX, United StatesHQ checked Sep 28, 2026	11-50	13 contacts →
	Partial evidence “CRS Class is a marine classification society promoting safer shipping and cleaner seas through state-of-the-art technology and expert classification services, focusing on maritime…” Source: RevenueBase Database · checked Sep 28, 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 security compliance 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 security compliance firms.
Partial evidence: Its own public description names part of maritime security compliance firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name maritime security compliance 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 208 maritime security compliance firms based in the United States

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

As of Sep 28, 2026

22.5%Verified-email coverage

11.7Average contacts per company

1-10Median size (employees)

7.2%Largest-city concentration · Houston

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

128

11-50

51-200

201-500

501-1,000

1,001-5,000

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 208 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 security compliance 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 security compliance 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 security compliance 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 security compliance 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, 545 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 28, 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.

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 security compliance 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 security compliance firms are there based in the United States?

RevenueBase identified 208 maritime security compliance 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?

American Guard Services, INC, headquartered in Gardena, tops this list with the largest team on record.

Which city has the most maritime security compliance firms?

Houston leads with 15 headquartered companies, followed by Fort Lauderdale (7) and Miami (5).

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 545 verified decision-maker contacts tracked across these 208 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 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 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.