Company lists · Data refreshed November 2026

Top 25 Oil and gas engineering firms based in the United States

RevenueBase identified 3,872 company matches for oil and gas engineering firms associated with the United States as of November 2026 and tracks 268,420 professional contacts across them, including 68,513 with verified work emails. Houston is the largest hub.

This list covers company matches for oil and gas engineering firms associated with the United States, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed November 4, 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.

How to read this list RevenueBase SmartSearch · Exact Recorded Nov 4, 2026 How this list was built
3,872Companies
268,420Contacts tracked
68,513Verified emails
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The 25 largest oil and gas engineering firms based in the United States

Ranked by team size
Top 25 of 3,872 company matches for oil and gas engineering firms based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 4, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchIrving, TX, United StatesHQ recorded Nov 4, 202610001+36,324 contacts →

Exact match

“Fluor Corporation is a global engineering, procurement and construction company.”

Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
2Exact matchReston, VA, United StatesHQ recorded Nov 4, 202610001+29,287 contacts →

Exact match

“Bechtel is a trusted engineering, construction and project management partner to industry and government.”

Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
3Exact matchHouston, TX, United StatesHQ recorded Nov 4, 202610001+21,606 contacts →

Exact match

“McDermott is a premier provider of engineering and construction solutions to the energy industry.”

Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
4Exact matchSan Antonio, TX, United StatesHQ recorded Nov 4, 202610001+7,226 contacts →

Exact match

“Zachry Group is North America's pacesetter in turnkey engineering, construction, maintenance, turnaround and fabrication services to the energy, chemicals, power, manufacturing…”

Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
5Exact matchHouston, LA, United StatesHQ recorded Nov 4, 20265,001-10,0003,819 contacts →

Exact match

“S&B is an engineer and constructor that designs and builds some of the largest and most complex industrial facilities in the world.”

Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
6Exact matchHailey, ID, United StatesHQ recorded Nov 4, 20261,001-5,0003,161 contacts →

Exact match

“POWER Engineers is now part of WSP.”

Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
7Exact matchLisle, IL, United StatesHQ recorded Nov 4, 20261,001-5,0003,019 contacts →

Exact match

“ENTRUST Solutions Group, an ENR Top 100 company, provides comprehensive and dependable engineering, consulting, and automation services to pipeline companies, gas and electric…”

Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
8Exact matchMenasha, WI, United StatesHQ recorded Nov 4, 20265,001-10,0002,999 contacts →

Exact match

“Faith Technologies Incorporated (FTI) is a dynamic organization comprised of construction, engineering, manufacturing and renewable energy experts.”

Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
9Exact matchHouston, TX, United StatesHQ recorded Nov 4, 20261,001-5,0002,991 contacts →

Exact match

“Headquartered in Houston, Texas, Key Energy Services provides a wide array of leading edge energy production solutions and services.”

Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
10Exact matchJacksonville, WI, United StatesHQ recorded Nov 4, 20261,001-5,0002,439 contacts →

Exact match

“Haskell delivers over $3 billion annually in Architecture, Engineering, Construction (AEC) and Consulting solutions to assure certainty of outcome for complex capital projects…”

Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
11Exact matchPhiladelphia, MS, United StatesHQ recorded Nov 4, 20265,001-10,0001,902 contacts →

Exact match

“Yates Construction is part of The Yates Companies, Inc.”

Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
12Exact matchMobile, AL, United StatesHQ recorded Nov 4, 20261,001-5,0001,882 contacts →

Exact match

“Hargrove is a full-service engineering, procurement, and construction management firm delivering multi-discipline engineering, project delivery, controls & automation, and…”

Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
13Exact matchHouston, TX, United StatesHQ recorded Nov 4, 20265,001-10,0001,831 contacts →

Exact match

“Oil States International, Inc.”

Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
14Exact matchAlbany, NH, United StatesHQ recorded Nov 4, 20261,001-5,0001,780 contacts →

Exact match

“CHA Consulting, Inc.(CHA) is an innovative, full-service engineering, design, consulting, and program/construction management firm providing a wide range of technology-enhanced…”

Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
15Exact matchHouston, LA, United StatesHQ recorded Nov 4, 20261,001-5,0001,699 contacts →

Exact match

“Founded in 1997, Audubon Companies LLC provides EPC, consulting, fabrication, and field services to energy and industrial operators across the globe.”

Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
16Exact matchMadison, AL, United StatesHQ recorded Nov 4, 202610001+1,698 contacts →

Exact match

“Hexagon’s Asset Lifecycle Intelligence division helps clients design, construct and operate more profitable, safe and sustainable industrial facilities.”

Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
17Exact matchSeattle, ID, United StatesHQ recorded Nov 4, 20261,001-5,0001,631 contacts →

Exact match

“KPFF is a multi-office, multi-discipline engineering firm.”

Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
18Exact matchHouston, TX, United StatesHQ recorded Nov 4, 202610001+1,610 contacts →

Exact match

“Founded in 1919, Halliburton is one of the world’s largest providers of products and services to the energy industry.”

Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
19Exact matchSouthfield, MI, United StatesHQ recorded Nov 4, 20261,001-5,0001,561 contacts →

Exact match

“Atwell is a full-service consulting, engineering and construction services firm that delivers a broad range of creative solutions to clients in the real estate and land…”

Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
20Exact matchTorrance, WA, United StatesHQ recorded Nov 4, 20261,001-5,0001,481 contacts →

Exact match

“Partner Assessment Corp.”

Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
21Exact matchThe Woodlands, LA, United StatesHQ recorded Nov 4, 202610001+1,468 contacts →

Exact match

“As a leading construction and maintenance provider, Bilfinger aims to enhance the efficiency of assets and lower operational costs.”

Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
22Exact matchThe Woodlands, TX, United StatesHQ recorded Nov 4, 20261,001-5,0001,359 contacts →

Exact match

“Cudd offers a broad range of technical and specialized oilfield services to companies engaged in the exploration and production of oil and natural gas worldwide.”

Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
23Exact matchHouston, TX, United StatesHQ recorded Nov 4, 2026201-5001,223 contacts →

Exact match

“Who We Are Englobal Founded in 1985, ENGlobal (NASDAQ: ENG) is a specialty engineering services firm that focuses on automation solutions and select EPCM projects for the energy…”

Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
24Exact matchHouston, TX, United StatesHQ recorded Nov 4, 20261,001-5,0001,165 contacts →

Exact match

“At Gulf Companies, we are driven by our mission to serve a vital role in the global energy industry.”

Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
25Exact matchHouston, TX, United StatesHQ recorded Nov 4, 20261,001-5,0001,159 contacts →

Exact match

“Long recognized for extraordinary performance, superb safety and long-standing partnerships, and now incorporating Frank’s International, Expro is focused on enabling our…”

Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase

Showing 25 of 3,872 oil and gas engineering firms based in the United States

See the full list, filter by size, metro and specialty, and access 68,513 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Oil and gas engineering firms based in the United States at a glance

As of Nov 4, 2026
25.5%Verified-email coverage
69.3Average contacts per company
11-50Median size (employees)
16.8%Largest-city concentration · Houston
Nov 4, 2026Page data refreshed

Companies by employee count

1-10
1,421
11-50
1,247
51-200
775
201-500
238
501-1,000
90
1,001-5,000
72
5,001-10,000
11
10001+
11

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 3,872 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

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
Company records associated with the United States whose business descriptions match “oil and gas engineering firms” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch
Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview
The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality
RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 68,513 professional contacts with verified work emails across the full matched dataset. 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 November 4, 2026. Lists refresh periodically as the graph is re-checked.
Record context
Company records and descriptions can change. Check the company's website for its current services and locations.

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “oil and gas engineering firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many oil and gas engineering firms are there based in the United States?

RevenueBase identified 3,872 company matches for oil and gas engineering firms associated with the United States as of November 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Fluor Corporation tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most oil and gas engineering firms?

Houston leads with 652 company records, followed by Midland (89) and Denver (58).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 68,513 professional contacts with verified work emails tracked across these 3,872 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on November 4, 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.