Company lists · Data refreshed November 2026

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

Name: Oil and gas engineering companies based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Nov 4, 2026 3,701 companies tracked

RevenueBase identified 3,701 company matches for oil and gas engineering companies associated with the United States as of November 2026 and tracks 354,295 professional contacts across them, including 102,111 with verified work emails. Houston is the largest hub.

This list covers company matches for oil and gas engineering companies 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

3,701Companies

354,295Contacts tracked

102,111Verified emails

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The 25 largest oil and gas engineering companies based in the United States

Ranked by team size

Top 25 of 3,701 company matches for oil and gas engineering companies 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.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	SLB	Exact match	Houston, TX, United StatesHQ recorded Nov 4, 2026	10001+	82,942 contacts →
	Exact match “SLB is a global technology company that has driven energy innovation for more than a century.” Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
2	Fluor Corporation	Exact match	Irving, TX, United StatesHQ recorded Nov 4, 2026	10001+	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
3	Bechtel Corporation	Exact match	Reston, VA, United StatesHQ recorded Nov 4, 2026	10001+	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
4	Mcdermott International, LTD	Exact match	Houston, TX, United StatesHQ recorded Nov 4, 2026	10001+	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
5	Zachry Group	Exact match	San Antonio, TX, United StatesHQ recorded Nov 4, 2026	10001+	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
6	S&b	Exact match	Houston, LA, United StatesHQ recorded Nov 4, 2026	5,001-10,000	3,819 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
7	Power Engineers	Exact match	Hailey, ID, United StatesHQ recorded Nov 4, 2026	1,001-5,000	3,161 contacts →
	Exact match “POWER Engineers is now part of WSP.” Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
8	Entrust Solutions Group	Exact match	Lisle, IL, United StatesHQ recorded Nov 4, 2026	1,001-5,000	3,019 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
9	FTI	Exact match	Menasha, WI, United StatesHQ recorded Nov 4, 2026	5,001-10,000	2,999 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
10	KEY Energy Services	Exact match	Houston, TX, United StatesHQ recorded Nov 4, 2026	1,001-5,000	2,991 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
11	Langan Engineering & Environmental Services	Exact match	Parsippany, TN, United StatesHQ recorded Nov 4, 2026	1,001-5,000	2,492 contacts →
	Exact match “Langan's client-focused, highly entrepreneurial culture cultivates an environment of opportunities in which career growth and teamwork flourish.” Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
12	The Haskell Company	Exact match	Jacksonville, WI, United StatesHQ recorded Nov 4, 2026	1,001-5,000	2,439 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
13	ECS Group Of Companies	Exact match	Chantilly, VA, United StatesHQ recorded Nov 4, 2026	1,001-5,000	2,363 contacts →
	Exact match “ECS Group of Companies is a Chantilly, VA-based consulting engineering firm.” Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
14	LJA	Exact match	Griffin, GA, United StatesHQ recorded Nov 4, 2026	1,001-5,000	2,206 contacts →
	Exact match “Employee-Owned.” Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
15	Hargrove Engineers & Constructors	Exact match	Mobile, AL, United StatesHQ recorded Nov 4, 2026	1,001-5,000	1,882 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
16	OIL States International	Exact match	Houston, TX, United StatesHQ recorded Nov 4, 2026	5,001-10,000	1,831 contacts →
	Exact match “Oil States International, Inc.” Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
17	Bowman Consulting	Exact match	Reston, VA, United StatesHQ recorded Nov 4, 2026	1,001-5,000	1,827 contacts →
	Exact match “Headquartered in Reston, Virginia, Bowman is a national engineering services firm delivering infrastructure solutions to customers who own, develop and maintain the built…” Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
18	CHA Consulting, INC	Exact match	Albany, NH, United StatesHQ recorded Nov 4, 2026	1,001-5,000	1,780 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
19	Audubon Companies	Exact match	Houston, LA, United StatesHQ recorded Nov 4, 2026	1,001-5,000	1,699 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
20	Hexagon Asset Lifecycle Intelligence	Exact match	Madison, AL, United StatesHQ recorded Nov 4, 2026	10001+	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
21	Kpff Consulting Engineers	Exact match	Seattle, ID, United StatesHQ recorded Nov 4, 2026	1,001-5,000	1,631 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
22	Halliburton Energy Services	Exact match	Houston, TX, United StatesHQ recorded Nov 4, 2026	10001+	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
23	Atwell, LLC	Exact match	Southfield, MI, United StatesHQ recorded Nov 4, 2026	1,001-5,000	1,561 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
24	Partner Engineering & Science, INC	Exact match	Torrance, WA, United StatesHQ recorded Nov 4, 2026	1,001-5,000	1,481 contacts →
	Exact match “Partner Assessment Corp.” Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase
25	Forum Energy Technologies	Exact match	Houston, TX, United StatesHQ recorded Nov 4, 2026	1,001-5,000	1,366 contacts →
	Exact match “FET (Forum Energy Technologies, Inc.) is a global company, serving the crude oil, natural gas, and renewable energy industries.” Recorded in the RevenueBase company graph · Nov 4, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “oil and gas engineering companies”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 3,701 oil and gas engineering companies based in the United States

See the full list, filter by size, metro and specialty, and access 102,111 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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

As of Nov 4, 2026

28.8%Verified-email coverage

95.7Average contacts per company

11-50Median size (employees)

16.2%Largest-city concentration · Houston

Nov 4, 2026Page data refreshed

Companies by employee count

1-10

1,444

11-50

1,184

51-200

687

201-500

214

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 3,701 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 companies” 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 102,111 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.

Oil and gas engineering companies by metro

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 companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

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

RevenueBase identified 3,701 company matches for oil and gas engineering companies 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?

SLB 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 companies?

Houston leads with 598 company records, followed by Midland (74) and Denver (54).

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 102,111 professional contacts with verified work emails tracked across these 3,701 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.