Company lists · Data refreshed September 2026

Top 25 Refinery expansion contractors based in Houston, United States

Name: Refinery expansion contractors based in Houston, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 17, 2026 177 companies tracked

RevenueBase identified 177 refinery expansion contractors headquartered in Houston, United States as of September 2026 and tracks 36,352 professional contacts across them, including 7,988 with verified work emails. Houston is the largest hub.

This list covers refinery expansion contractors headquartered in Houston, 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

177Companies

36,352Contacts tracked

7,988Verified emails

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The 25 largest refinery expansion contractors based in Houston, United States

Ranked by team size

Top 25 of 177 refinery expansion contractors based in Houston, United States, ranked by team size, largest first. Data refreshed Sep 17, 2026. RevenueBase Smart Search rates how each company's information relates to refinery expansion 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	Indirect evidence	Houston, TX, United StatesHQ checked Sep 17, 2026	10001+	20,135 contacts →
	Indirect evidence “McDermott is a premier provider of engineering and construction solutions to the energy industry.” Source: RevenueBase Database · checked Sep 17, 2026
2	S&b	Indirect evidence	Houston, TX, United StatesHQ checked Sep 17, 2026	5,001-10,000	3,510 contacts →
	Indirect evidence “S&B is an engineer and constructor that designs and builds some of the largest and most complex industrial facilities in the world.” Source: RevenueBase Database · checked Sep 17, 2026
3	Audubon Companies	Indirect evidence	Houston, TX, United StatesHQ checked Sep 17, 2026	1,001-5,000	1,488 contacts →
	Indirect evidence “Founded in 1997, Audubon Companies LLC provides EPC, consulting, fabrication, and field services to energy and industrial operators across the globe.” Source: RevenueBase Database · checked Sep 17, 2026
4	Gulf Companies	Indirect evidence	Houston, TX, United StatesHQ checked Sep 17, 2026	1,001-5,000	1,046 contacts →
	Indirect evidence “At Gulf Companies, we are driven by our mission to serve a vital role in the global energy industry.” Source: RevenueBase Database · checked Sep 17, 2026
5	Wyatt Field Service Company	Indirect evidence	Houston, TX, United StatesHQ checked Sep 17, 2026	1,001-5,000	686 contacts →
	Indirect evidence “WYATT is recognized for executing complex maintenance, outage, turnaround, and capital construction projects across the Oil, Gas & Chemical, and Power markets.” Source: RevenueBase Database · checked Sep 17, 2026
6	Willbros	Partial evidence	Houston, TX, United StatesHQ checked Sep 17, 2026	10001+	665 contacts →
	Partial 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
7	The Mundy Companies	Indirect evidence	Houston, TX, United StatesHQ checked Sep 17, 2026	1,001-5,000	564 contacts →
	Indirect evidence “The Mundy Companies is a privately owned company headquartered in Houston, Texas with offices Pasadena, TX, Nederland, TX, and Wilmington, NC.” Source: RevenueBase Database · checked Sep 17, 2026
8	Scmi INC	Indirect evidence	Houston, TX, United StatesHQ checked Sep 17, 2026	n/a	470 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 17, 2026
9	CAM Industrial Solutions LLC	Partial evidence	Houston, TX, United StatesHQ checked Sep 17, 2026	5,001-10,000	434 contacts →
	Partial evidence “With decades of refinery, petrochemical, fertilizer and power plant experience, CAM Industrial Solutions has become the standard in heavy industrial maintenance, turnaround and…” Source: RevenueBase Database · checked Sep 17, 2026
10	Kestrel Engineering, INC	Indirect evidence	Houston, TX, United StatesHQ checked Sep 17, 2026	201-500	318 contacts →
	Indirect evidence “Kestrel provides engineering, project and construction management and inspection services to the oil and gas industries.” Source: RevenueBase Database · checked Sep 17, 2026
11	ARION	Indirect evidence	Houston, TX, United StatesHQ checked Sep 17, 2026	201-500	310 contacts →
	Indirect evidence “We are A-Team of engineers specializing in the energy industry.” Source: RevenueBase Database · checked Sep 17, 2026
12	Gulfspan Industrial LLC	Indirect evidence	Houston, TX, United StatesHQ checked Sep 17, 2026	1,001-5,000	251 contacts →
	Indirect 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
13	CTS Complete Technical Services	Indirect evidence	Houston, TX, United StatesHQ checked Sep 17, 2026	51-200	250 contacts →
	Indirect evidence “CTS - Complete Technical Services, Inc.” Source: RevenueBase Database · checked Sep 17, 2026
14	Gulf Island	Indirect evidence	Houston, TX, United StatesHQ checked Sep 17, 2026	501-1,000	193 contacts →
	Indirect evidence “Gulf Island is a leading fabricator of complex steel structures and modules and provider of specialty services, including project management, hookup, commissioning, repair…” Source: RevenueBase Database · checked Sep 17, 2026
15	Rush Resources	Indirect evidence	Houston, TX, United StatesHQ checked Sep 17, 2026	201-500	136 contacts →
	Indirect evidence “Improve and optimize capital construction, shutdown, turnaround and maintenance project experiences-no matter their stage of completion or location-through proven, rapid…” Source: RevenueBase Database · checked Sep 17, 2026
16	Pyramid E&c	Indirect evidence	Houston, TX, United StatesHQ checked Sep 17, 2026	201-500	129 contacts →
	Indirect evidence “We, Pyramid E&C provide Modular, Digital and Sustainable Hydrocarbon processing solutions from last 25 years and have executed more than 700 projects worldwide.” Source: RevenueBase Database · checked Sep 17, 2026
17	Holloman Corporation	Indirect evidence	Houston, TX, United StatesHQ checked Sep 17, 2026	501-1,000	125 contacts →
	Indirect evidence “Holloman Corporation is an Engineering, Procurement, and Construction company with capabilities to design, build, and service energy-related projects on a global level.” Source: RevenueBase Database · checked Sep 17, 2026
18	Perc Engineering	Indirect evidence	Houston, TX, United StatesHQ checked Sep 17, 2026	51-200	124 contacts →
	Indirect evidence “PERC Engineering is a full-service engineering & project management firm in the oil & gas energy sector.” Source: RevenueBase Database · checked Sep 17, 2026
19	Strategy Engineering And Consulting, LLC	Indirect evidence	Houston, TX, United StatesHQ checked Sep 17, 2026	51-200	76 contacts →
	Indirect evidence “Strategy Engineering is a privately-owned technical services company located within the Energy Corridor in Houston, TX.” Source: RevenueBase Database · checked Sep 17, 2026
20	BD Energy Systems, LLC	Indirect evidence	Houston, TX, United StatesHQ checked Sep 17, 2026	51-200	65 contacts →
	Indirect evidence “BD Energy Systems LLC located in Houston, TX, USA is a world leading engineering company operating in the Petrochemical, Fertilizer, Refining, and Gas Processing industry…” Source: RevenueBase Database · checked Sep 17, 2026
21	Able Industrial	Indirect evidence	Houston, TX, United StatesHQ checked Sep 17, 2026	201-500	62 contacts →
	Indirect evidence “ABLE Industrial delivers top-tier construction, fabrication, and specialty welding services across industries like food & beverage, petrochemical, power, and manufacturing.” Source: RevenueBase Database · checked Sep 17, 2026
22	Pinnacle Engineering	Indirect evidence	Houston, TX, United StatesHQ checked Sep 17, 2026	51-200	62 contacts →
	Indirect evidence “Since 1993, Pinnacle has remained focused on providing practical and complete engineering services to the offshore oil and gas industry.” Source: RevenueBase Database · checked Sep 17, 2026
23	F&c Engineers	Indirect evidence	Houston, TX, United StatesHQ checked Sep 17, 2026	51-200	60 contacts →
	Indirect evidence “F&C Engineers provides full services from concept to start up for the oil and gas upstream, midstream, and turbomachinery industries.” Source: RevenueBase Database · checked Sep 17, 2026
24	Diamond Refractory Services, LLC	Indirect evidence	Houston, TX, United StatesHQ checked Sep 17, 2026	51-200	45 contacts →
	Indirect evidence “Diamond Refractory specializes in the installation and repair of refractory materials for critical units in process plants.” Source: RevenueBase Database · checked Sep 17, 2026
25	Azota GAS Processing, LTD	Indirect evidence	Houston, TX, United StatesHQ checked Sep 17, 2026	51-200	45 contacts →
	Indirect evidence “Azota is a leading provider of gas infrastructure projects based in Houston, Texas.” 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: refinery expansion 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 refinery expansion contractors.
Partial evidence: Its own public description names part of refinery expansion contractors, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name refinery expansion 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 177 refinery expansion contractors based in Houston, United States

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Refinery expansion contractors based in Houston, United States at a glance

As of Sep 17, 2026

22.0%Verified-email coverage

205.4Average contacts per company

11-50Median size (employees)

100.0%Largest-city concentration · Houston

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

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 across the whole United States list rather than for Houston, so it is reported there. Company counts and contact totals on this page are exact for Houston, over 177 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 refinery expansion 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 Houston, United States whose own description of what they do matches “refinery expansion 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 refinery expansion 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 refinery expansion contractors, and records with no verified work email. Companies headquartered outside Houston 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, 7,988 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.

Refinery expansion contractors by metro in the United States

Refinery expansion contractors in Houston177
Refinery expansion contractors in Midland26
Refinery expansion contractors in Tulsa26

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 refinery expansion 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 refinery expansion contractors are there based in Houston, United States?

RevenueBase identified 177 refinery expansion contractors headquartered in Houston, 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 refinery expansion contractors?

Houston leads with 177 headquartered companies, followed by Midland (26) and Tulsa (26).

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 7,988 verified decision-maker contacts tracked across these 177 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.