Company lists · Data refreshed September 2026

Top 25 Offshore construction contractors based in the United States

Name: Offshore construction contractors 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 599 companies tracked

RevenueBase identified 599 offshore construction contractors headquartered in the United States as of September 2026 and tracks 87,168 professional contacts across them, including 20,394 with verified work emails. Houston is the largest hub.

This list covers offshore construction contractors 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

599Companies

87,168Contacts tracked

20,394Verified emails

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The 25 largest offshore construction contractors based in the United States

Ranked by team size

Top 25 of 599 offshore construction contractors 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 offshore construction contractors: 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	Mcdermott International, LTD	Partial evidence	Houston, TX, United StatesHQ checked Sep 17, 2026	10001+	20,135 contacts →
	Partial evidence “McDermott is a premier provider of engineering and construction solutions to the energy industry.” Source: RevenueBase Database · checked Sep 17, 2026
2	Oceaneering	Partial evidence	Houston, TX, United StatesHQ checked Sep 17, 2026	10001+	12,031 contacts →
	Partial evidence “Oceaneering is a global technology company delivering engineered services and products and robotic solutions to the offshore energy, defense, aerospace, and manufacturing…” Source: RevenueBase Database · checked Sep 17, 2026
3	EXPRO	Indirect evidence	Houston, TX, United StatesHQ checked Sep 17, 2026	5,001-10,000	6,466 contacts →
	Indirect evidence “Long recognized for extraordinary performance, superb safety and long-standing partnerships, and now incorporating Frank’s International, Expro is focused on enabling our…” Source: RevenueBase Database · checked Sep 17, 2026
4	Noble Corporation	Strong evidence	Houston, TX, United StatesHQ checked Sep 17, 2026	5,001-10,000	5,601 contacts →
	Strong evidence “Noble is a leading offshore drilling contractor for the oil and gas industry.” Source: RevenueBase Database · checked Sep 17, 2026
5	FMC Technologies	Indirect evidence	Houston, TX, United StatesHQ checked Sep 17, 2026	10001+	4,749 contacts →
	Indirect evidence “FMC Technologies is now TechnipFMC.” Source: RevenueBase Database · checked Sep 17, 2026
6	Valaris Limited	Indirect evidence	Houston, TX, United StatesHQ checked Sep 17, 2026	5,001-10,000	3,173 contacts →
	Indirect evidence “We Are Valaris With decades of expertise and strategic commitment built on efficiency, capability and ingenuity, our sights are continually set toward a future built with purpose…” Source: RevenueBase Database · checked Sep 17, 2026
7	OIL States International	Indirect evidence	Houston, TX, United StatesHQ checked Sep 17, 2026	5,001-10,000	2,215 contacts →
	Indirect evidence “Oil States International, Inc.” Source: RevenueBase Database · checked Sep 17, 2026
8	Helix Energy Solutions Group	Partial evidence	Houston, TX, United StatesHQ checked Sep 17, 2026	1,001-5,000	1,706 contacts →
	Partial evidence “Helix Energy Solutions, headquartered in Houston, Texas, is an international offshore energy services company that provides specialty services to the offshore energy industry…” Source: RevenueBase Database · checked Sep 17, 2026
9	Weeks Marine, INC	Indirect evidence	Cranford, NJ, United StatesHQ checked Sep 17, 2026	1,001-5,000	847 contacts →
	Indirect evidence “Founded in 1919, Weeks Marine, Inc.” Source: RevenueBase Database · checked Sep 17, 2026
10	KBR Energo Engineering	Partial evidence	Houston, TX, United StatesHQ checked Sep 17, 2026	n/a	789 contacts →
	Partial evidence “Energo Engineering is a KBR Company that provides the full package of structural integrity management (SIM) and advanced structural engineering services for offshore floating and…” Source: RevenueBase Database · checked Sep 17, 2026
11	Modec International INC	Strong evidence	Houston, TX, United StatesHQ checked Sep 17, 2026	201-500	685 contacts →
	Strong evidence “MODEC is a general contractor specializing in engineering, procurement, construction and installation of floating production systems including Floating Production Storage and…” Source: RevenueBase Database · checked Sep 17, 2026
12	Willbros	Strong evidence	Houston, TX, United StatesHQ checked Sep 17, 2026	10001+	665 contacts →
	Strong evidence “Primoris is a specialty energy infrastructure contractor serving the oil and gas and power industries with offerings that primarily include construction, maintenance and…” Source: RevenueBase Database · checked Sep 17, 2026
13	Atwood Oceanics	Indirect evidence	Houston, TX, United StatesHQ checked Sep 17, 2026	501-1,000	639 contacts →
	Indirect evidence “Atwood Oceanics, Inc.” Source: RevenueBase Database · checked Sep 17, 2026
14	Manson Construction CO	Partial evidence	Seattle, WA, United StatesHQ checked Sep 17, 2026	501-1,000	592 contacts →
	Partial evidence “Manson is one of the nation’s leading heavy civil marine construction and dredging companies.” Source: RevenueBase Database · checked Sep 17, 2026
15	Dynamic Industries, INC	Indirect evidence	New Orleans, LA, United StatesHQ checked Sep 17, 2026	1,001-5,000	567 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 17, 2026
16	Pacific Drilling	Indirect evidence	Houston, TX, United StatesHQ checked Sep 17, 2026	501-1,000	538 contacts →
	Indirect evidence “On April 15, 2021, Noble Corporation plc completed its acquisition of Pacific Drilling Company LLC.” Source: RevenueBase Database · checked Sep 17, 2026
17	Sunland Construction, Inc. And Affiliates	Partial evidence	Eunice, LA, United StatesHQ checked Sep 17, 2026	1,001-5,000	364 contacts →
	Partial evidence “Our Mission: To be the premier provider for energy related construction services through a commitment to excellence in safety, production, and quality, with the resolve to…” Source: RevenueBase Database · checked Sep 17, 2026
18	Performance Energy Services, LLC	Partial evidence	Houma, LA, United StatesHQ checked Sep 17, 2026	501-1,000	305 contacts →
	Partial evidence “Performance Energy Services, a Danos company, was formed in to deliver safe, client-focused support to the onshore and offshore energy markets.” Source: RevenueBase Database · checked Sep 17, 2026
19	B&e Resources, LLC	Partial evidence	Beaumont, TX, United StatesHQ checked Sep 17, 2026	501-1,000	286 contacts →
	Partial evidence “B&E Resources is an oil field service company specializing in industrial construction and custom fabrication.” Source: RevenueBase Database · checked Sep 17, 2026
20	Crosby Energy Services	Indirect evidence	Cut Off, LA, United StatesHQ checked Sep 17, 2026	201-500	272 contacts →
	Indirect evidence “Founded as C&D Wireline in 1968, with C&D Production Specialist joining the business in 1993, today Crosby Energy Services is a certified Women’s Business Enterprise National…” Source: RevenueBase Database · checked Sep 17, 2026
21	Offshore Inland Marine & Oilfield Services, INC	Strong evidence	Pensacola, FL, United StatesHQ checked Sep 17, 2026	51-200	266 contacts →
	Strong evidence “Offshore Inland Marine & Oilfield Services, Inc.(OIMO) corporate headquarters in Pensacola,FL provides a full range of Drilling Rig services and construction support activities…” Source: RevenueBase Database · checked Sep 17, 2026
22	Trendsetter Engineering, INC	Indirect evidence	Houston, TX, United StatesHQ checked Sep 17, 2026	201-500	259 contacts →
	Indirect evidence “Trendsetter is a global provider of specialized subsea solutions to the oil and gas industry's toughest challenges.” Source: RevenueBase Database · checked Sep 17, 2026
23	Gulfspan Industrial LLC	Partial evidence	Houston, TX, United StatesHQ checked Sep 17, 2026	1,001-5,000	251 contacts →
	Partial evidence “Gulfspan Industrial, LLC is a mechanical construction and industrial services company that specializes in performing turnarounds, capital projects, and maintenance.” Source: RevenueBase Database · checked Sep 17, 2026
24	Ballard Marine Construction	Strong evidence	Washougal, WA, United StatesHQ checked Sep 17, 2026	51-200	236 contacts →
	Strong evidence “Ballard Marine Construction (Ballard) is a specialty marine and underwater contractor.” Source: RevenueBase Database · checked Sep 17, 2026
25	Seatrium Amfels, INC	Partial evidence	Brownsville, TX, United StatesHQ checked Sep 17, 2026	1,001-5,000	229 contacts →
	Partial evidence “Seatrium AmFELS is an industry pioneer committed to sustainability by providing cleaner offshore & marine solutions, offshore renewables, and new energy, generating long-term…” 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: offshore construction contractors. 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 offshore construction contractors.
Partial evidence: Its own public description names part of offshore construction contractors, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name offshore construction contractors. 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 599 offshore construction contractors based in the United States

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Offshore construction contractors based in the United States at a glance

As of Sep 17, 2026

23.4%Verified-email coverage

145.5Average contacts per company

11-50Median size (employees)

24.5%Largest-city concentration · Houston

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

165

11-50

184

51-200

146

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 599 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 offshore construction contractors, 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 “offshore construction contractors”. 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 offshore construction contractors), 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 offshore construction contractors, 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, 20,394 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.

Offshore construction contractors by metro

Offshore construction contractors in Houston147

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 offshore construction contractors, 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 offshore construction contractors are there based in the United States?

RevenueBase identified 599 offshore construction contractors 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?

Mcdermott International, LTD, headquartered in Houston, tops this list with the largest team on record.

Which city has the most offshore construction contractors?

Houston leads with 147 headquartered companies, followed by Katy (11) and Houma (10).

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 20,394 verified decision-maker contacts tracked across these 599 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.