Company lists · Data refreshed September 2026
Top 25 Maritime compliance consulting firms based in the United States
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, 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.
The 25 largest maritime compliance consulting firms based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | Leidos Gibbs & COXPartial evidence | 394 | |||
“Leidos Gibbs & Cox is an engineering and design firm specializing naval architecture, marine engineering, and consulting engineering.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 2 | 304 | ||||
“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: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 3 | 130 | ||||
“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: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 4 | International Register Of ShippingIndirect evidence | 112 | |||
“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: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 5 | GlostenIndirect evidence | 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, 2026Thanks. The Data Team will review it. | |||||
| 6 | 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, 2026Thanks. The Data Team will review it. | |||||
| 7 | Mcquilling Partners, INCIndirect evidence | 96 | |||
Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 8 | 90 | ||||
“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: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 9 | Thomas Quinn, LLPIndirect evidence | 89 | |||
“Thomas Quinn, LLP is founded on the principles of honesty and accountability.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 10 | 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, 2026Thanks. The Data Team will review it. | |||||
| 11 | 84 | ||||
“BSI Consulting offers comprehensive world-class solutions in environmental, health, safety (EHS), supply chain security, and sustainability.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 12 | 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, 2026Thanks. The Data Team will review it. | |||||
| 13 | 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, 2026Thanks. The Data Team will review it. | |||||
| 14 | 76 | ||||
“Baker Marine Solutions is a leading provider of marine assurance, engineering and consulting services, performing DP assurance, OCIMF- OVID inspections, IMCA CMID inspections…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 15 | 64 | ||||
“Capital Ship Solutions provides expert Technical, Engineering and Management Consultancy for diverse stakeholders in the Shipping and Offshore sectors.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 16 | 56 | ||||
“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: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 17 | 55 | ||||
“Entrion provides value-driven services and support that resolve equipment safety and quality challenges in the offshore industry to manufacturers, drilling contractors, and…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 18 | Maritech CommercialPartial evidence | 52 | |||
“MARiTECH Commercial, LLC and its subsidiary companies and partners provide maritime consultancy services to maximize value and minimize lost time for clients.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 19 | Hepburn And Sons LLCIndirect evidence | 52 | |||
“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: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 20 | Gallagher Marine Systems - LLCPartial evidence | 49 | |||
“Gallagher Marine Systems (GMS) is the industry’s most comprehensive source of full-service, in-depth, compliance support.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 21 | 48 | ||||
“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: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 22 | 45 | ||||
“ERGONAV GROUP is an International privately-owned Corporation active in the Maritime Sector, focusing on Environmental Testing & Inspections.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 23 | TBS SafetyPartial evidence | 45 | |||
“TBS Safety is your trusted partner in building safer, stronger operations across the maritime industry and beyond.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 24 | Sabine Surveyors, LTDPartial evidence | 41 | |||
“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: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 25 | J Connor Consulting, INCIndirect evidence | 39 | |||
“The Company J.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
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, 2026Companies by employee count
Verified emails by last verification
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 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 compliance 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 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 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, 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
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 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.
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