Company lists · Data refreshed September 2026

Top 25 Naval engineering firms based in the United States

Name: Naval engineering 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 17, 2026 269 companies tracked

RevenueBase identified 269 naval engineering firms headquartered in the United States as of September 2026 and tracks 38,331 professional contacts across them, including 2,209 with verified work emails. Seattle is the largest hub.

This list covers naval engineering 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 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

269Companies

38,331Contacts tracked

2,209Verified emails

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The 25 largest naval engineering firms based in the United States

Ranked by team size

Top 25 of 269 naval engineering firms 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 naval engineering 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	General Dynamics Electric Boat	Indirect evidence	Groton, CT, United StatesHQ checked Sep 17, 2026	10001+	8,318 contacts →
	Indirect evidence “General Dynamics Electric Boat is a business unit of General Dynamics with headquarters in Groton, CT.” Source: RevenueBase Database · checked Sep 17, 2026
2	Newport News Shipbuilding, A Division Of HII	Indirect evidence	Newport News, VA, United StatesHQ checked Sep 17, 2026	10001+	7,430 contacts →
	Indirect evidence “For 137 years, the ships built at Newport News Shipbuilding, like the American shipbuilders who built them, have served our nation in peace and war, in times of adversity and in…” Source: RevenueBase Database · checked Sep 17, 2026
3	General Dynamics Nassco	Indirect evidence	San Diego, CA, United StatesHQ checked Sep 17, 2026	1,001-5,000	1,484 contacts →
	Indirect evidence “General Dynamics NASSCO traces its beginnings to the working waterfront of beautiful and historic San Diego Bay.” Source: RevenueBase Database · checked Sep 17, 2026
4	Bollinger Shipyards	Indirect evidence	Lockport, United StatesHQ checked Sep 17, 2026	5,001-10,000	853 contacts →
	Indirect evidence “Bollinger Shipyards is the leading provider of quality new construction, repair and conversion products and services to both the military and commercial marine industry.” Source: RevenueBase Database · checked Sep 17, 2026
5	Fairbanks Morse Defense	Partial evidence	Beloit, WI, United StatesHQ checked Sep 17, 2026	1,001-5,000	679 contacts →
	Partial evidence “Fairbanks Morse Defense (FMD) is the leading provider of the highest value equipment for naval defense customers.” Source: RevenueBase Database · checked Sep 17, 2026
6	Amsec Llc, A Subsidiary Of Huntington Ingalls Industries	Partial evidence	Virginia Beach, VA, United StatesHQ checked Sep 17, 2026	1,001-5,000	627 contacts →
	Partial evidence “The Fleet Support Group has more than 2,500 employees in over 35 locations across the globe, providing maintenance, modernization, unmanned systems development, engineering…” Source: RevenueBase Database · checked Sep 17, 2026
7	Hanwha Philly Shipyard	Indirect evidence	Philadelphia, PA, United StatesHQ checked Sep 17, 2026	1,001-5,000	486 contacts →
	Indirect evidence “Trusted U.S.” Source: RevenueBase Database · checked Sep 17, 2026
8	Leidos Gibbs & COX	Strong evidence	Arlington, VA, United StatesHQ checked Sep 17, 2026	201-500	394 contacts →
	Strong evidence “Leidos Gibbs & Cox is an engineering and design firm specializing naval architecture, marine engineering, and consulting engineering.” Source: RevenueBase Database · checked Sep 17, 2026
9	WR Systems	Partial evidence	Fairfax, VA, United StatesHQ checked Sep 17, 2026	201-500	372 contacts →
	Partial evidence “Engineering and Technical Services As a leader in navigation and geospatial engineering, WR is on the forefront of maritime innovation, designing and integrating PNT systems…” Source: RevenueBase Database · checked Sep 17, 2026
10	Delphinus Engineering, INC	Indirect evidence	Eddystone, PA, United StatesHQ checked Sep 17, 2026	501-1,000	357 contacts →
	Indirect evidence “Founded in 1994 as a small, diversified professional services company, Delphinus today employs more than 650 professional and technical personnel supporting a customer base that…” Source: RevenueBase Database · checked Sep 17, 2026
11	Eastern Shipbuilding Group, INC	Indirect evidence	Panama City, FL, United StatesHQ checked Sep 17, 2026	1,001-5,000	317 contacts →
	Indirect evidence “Eastern Shipbuilding Group, Inc.(ESG) is an American owned and operated shipbuilder with three shipyards on the Florida Gulf Coast.” Source: RevenueBase Database · checked Sep 17, 2026
12	Q.E.D. Systems, INC	Indirect evidence	Virginia Beach, VA, United StatesHQ checked Sep 17, 2026	501-1,000	284 contacts →
	Indirect evidence “Quod Erat Demonstrandum (QED) – “That which has been demonstrated or proven” – QED Systems Inc.” Source: RevenueBase Database · checked Sep 17, 2026
13	Colonna's Shipyard	Indirect evidence	Norfolk, VA, United StatesHQ checked Sep 17, 2026	501-1,000	276 contacts →
	Indirect evidence “We are Colonna's.” Source: RevenueBase Database · checked Sep 17, 2026
14	Reliability & Performance Technologies R&p	Indirect evidence	Dublin, PA, United StatesHQ checked Sep 17, 2026	201-500	241 contacts →
	Indirect evidence “Reliability & Performance Technologies (R&P) in 2025 celebrates our 25th anniversary of supporting nearly every U.S.” Source: RevenueBase Database · checked Sep 17, 2026
15	Sayres Defense	Indirect evidence	Washington, DC, United StatesHQ checked Sep 17, 2026	201-500	221 contacts →
	Indirect evidence “Sayres Defense has been providing excellence in service to the federal government since 2001.” Source: RevenueBase Database · checked Sep 17, 2026
16	Conrad Shipyard	Indirect evidence	Morgan City, LA, United StatesHQ checked Sep 17, 2026	201-500	218 contacts →
	Indirect evidence “Conrad Shipyard specializes in the construction, conversion and repair of a wide variety of steel and aluminum marine vessels for commercial and governmental customers.” Source: RevenueBase Database · checked Sep 17, 2026
17	Bellingham Marine	Indirect evidence	Jacksonville, FL, United StatesHQ checked Sep 17, 2026	201-500	163 contacts →
	Indirect evidence “Bellingham Marine is an established leader in the marine construction world.” Source: RevenueBase Database · checked Sep 17, 2026
18	Tech-Marine Business, Inc. TMB	Indirect evidence	Washington, DC, United StatesHQ checked Sep 17, 2026	51-200	158 contacts →
	Indirect evidence “Tech-Marine Business, Inc.(TMB) was founded in 1997 with a focus on delivery of Subject Matter Expert support to Navy Shipbuilding Program Managers.” Source: RevenueBase Database · checked Sep 17, 2026
19	Pacific Ship Repair And Fabrication, INC	Indirect evidence	San Diego, United StatesHQ checked Sep 17, 2026	51-200	130 contacts →
	Indirect evidence “San Diego based ship repair facility” Source: RevenueBase Database · checked Sep 17, 2026
20	Lanier & Associates Consulting Engineers, INC	Partial evidence	New Orleans, LA, United StatesHQ checked Sep 17, 2026	51-200	122 contacts →
	Partial evidence “Lanier & Associates is a multi-disciplined engineering firm that specializes in industrial marine projects with civil, structural, mechanical, electrical and instrumentation…” Source: RevenueBase Database · checked Sep 17, 2026
21	Marine Systems Corporation Mscorp	Partial evidence	Boston, MA, United StatesHQ checked Sep 17, 2026	51-200	116 contacts →
	Partial evidence “MSCorp is a privately held Small Business specializing in marine engineering, design, logistical, planning & maintenance support, and computer oriented support to the United…” Source: RevenueBase Database · checked Sep 17, 2026
22	BAY Ship & Yacht CO	Indirect evidence	Alameda, CA, United StatesHQ checked Sep 17, 2026	201-500	108 contacts →
	Indirect evidence “Bay Ship & Yacht Co.(BSY) was founded in 1977 by Bill Elliott with primary focus on the construction and repair of wooden ships.” Source: RevenueBase Database · checked Sep 17, 2026
23	Swiftships	Partial evidence	Morgan City, LA, United StatesHQ checked Sep 17, 2026	201-500	107 contacts →
	Partial evidence “Swiftships is an ISO 9001 certified, USA shipbuilder, and global defense contractor which offers end-to-end engineering, shipbuilding, testing, and delivery services for new…” Source: RevenueBase Database · checked Sep 17, 2026
24	Glosten	Strong evidence	Seattle, WA, United StatesHQ checked Sep 17, 2026	51-200	104 contacts →
	Strong 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 17, 2026
25	Elliott BAY Design Group	Strong evidence	Seattle, WA, United StatesHQ checked Sep 17, 2026	51-200	80 contacts →
	Strong 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 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: naval engineering 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 naval engineering firms.
Partial evidence: Its own public description names part of naval engineering firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name naval engineering 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 269 naval engineering firms based in the United States

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Naval engineering firms based in the United States at a glance

As of Sep 17, 2026

5.8%Verified-email coverage

142.5Average contacts per company

11-50Median size (employees)

3.7%Largest-city concentration · Seattle

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

119

11-50

51-200

201-500

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 269 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 naval engineering 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 “naval engineering 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 naval engineering 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 naval engineering 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, 2,209 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.

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 naval engineering 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 naval engineering firms are there based in the United States?

RevenueBase identified 269 naval engineering 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?

General Dynamics Electric Boat, headquartered in Groton, tops this list with the largest team on record.

Which city has the most naval engineering firms?

Seattle leads with 10 headquartered companies, followed by Fort Lauderdale (8) and Houston (8).

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 2,209 verified decision-maker contacts tracked across these 269 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.