Company lists · Data refreshed October 2026

Top 25 Oil, gas & petroleum engineering services based in the United States

Name: Oil, gas & petroleum engineering services based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Oct 28, 2026 3,692 companies tracked

RevenueBase identified 3,692 company matches for oil, gas & petroleum engineering services associated with the United States as of October 2026 and tracks 250,104 professional contacts across them, including 71,510 with verified work emails. Houston is the largest hub.

This list covers company matches for oil, gas & petroleum engineering services 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 October 28, 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 Oct 28, 2026 How this list was built

3,692Companies

250,104Contacts tracked

71,510Verified emails

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The 25 largest oil, gas & petroleum engineering services based in the United States

Ranked by team size

Top 25 of 3,692 company matches for oil, gas & petroleum engineering services based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 28, 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	Fluor Corporation	Exact match	Irving, TX, United StatesHQ recorded Oct 28, 2026	10001+	35,091 contacts →
	Exact match “Fluor Corporation is a global engineering, procurement and construction company.” Recorded in the RevenueBase company graph · Oct 28, 2026 · View company records in RevenueBase
2	Bechtel Corporation	Exact match	Reston, VA, United StatesHQ recorded Oct 28, 2026	10001+	28,458 contacts →
	Exact match “Bechtel is a trusted engineering, construction and project management partner to industry and government.” Recorded in the RevenueBase company graph · Oct 28, 2026 · View company records in RevenueBase
3	Mcdermott International, LTD	Exact match	Houston, TX, United StatesHQ recorded Oct 28, 2026	10001+	21,087 contacts →
	Exact match “McDermott is a premier provider of engineering and construction solutions to the energy industry.” Recorded in the RevenueBase company graph · Oct 28, 2026 · View company records in RevenueBase
4	Zachry Group	Exact match	San Antonio, TX, United StatesHQ recorded Oct 28, 2026	10001+	7,053 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 · Oct 28, 2026 · View company records in RevenueBase
5	S&b	Exact match	Houston, TX, United StatesHQ recorded Oct 28, 2026	5,001-10,000	3,615 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 · Oct 28, 2026 · View company records in RevenueBase
6	Power Engineers	Exact match	Hailey, ID, United StatesHQ recorded Oct 28, 2026	1,001-5,000	3,059 contacts →
	Exact match “POWER Engineers is now part of WSP.” Recorded in the RevenueBase company graph · Oct 28, 2026 · View company records in RevenueBase
7	Entrust Solutions Group	Exact match	Lisle, IL, United StatesHQ recorded Oct 28, 2026	1,001-5,000	3,020 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 · Oct 28, 2026 · View company records in RevenueBase
8	FTI	Exact match	Menasha, WI, United StatesHQ recorded Oct 28, 2026	1,001-5,000	2,979 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 · Oct 28, 2026 · View company records in RevenueBase
9	Langan Engineering & Environmental Services	Exact match	Parsippany, NJ, United StatesHQ recorded Oct 28, 2026	1,001-5,000	2,402 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 · Oct 28, 2026 · View company records in RevenueBase
10	The Haskell Company	Exact match	Jacksonville, FL, United StatesHQ recorded Oct 28, 2026	1,001-5,000	2,390 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 · Oct 28, 2026 · View company records in RevenueBase
11	ECS Group Of Companies	Exact match	Chantilly, VA, United StatesHQ recorded Oct 28, 2026	1,001-5,000	2,259 contacts →
	Exact match “ECS Group of Companies is a Chantilly, VA-based consulting engineering firm.” Recorded in the RevenueBase company graph · Oct 28, 2026 · View company records in RevenueBase
12	Hargrove Engineers & Constructors	Exact match	Mobile, AL, United StatesHQ recorded Oct 28, 2026	1,001-5,000	1,881 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 · Oct 28, 2026 · View company records in RevenueBase
13	Yates Construction	Exact match	Philadelphia, MS, United StatesHQ recorded Oct 28, 2026	5,001-10,000	1,831 contacts →
	Exact match “Yates Construction is part of The Yates Companies, Inc.” Recorded in the RevenueBase company graph · Oct 28, 2026 · View company records in RevenueBase
14	Bowman Consulting	Exact match	Reston, VA, United StatesHQ recorded Oct 28, 2026	1,001-5,000	1,778 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 · Oct 28, 2026 · View company records in RevenueBase
15	CHA Consulting, INC	Exact match	Albany, NY, United StatesHQ recorded Oct 28, 2026	1,001-5,000	1,733 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 · Oct 28, 2026 · View company records in RevenueBase
16	Audubon Companies	Exact match	Houston, TX, United StatesHQ recorded Oct 28, 2026	1,001-5,000	1,652 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 · Oct 28, 2026 · View company records in RevenueBase
17	OIL States International	Exact match	Houston, TX, United StatesHQ recorded Oct 28, 2026	5,001-10,000	1,652 contacts →
	Exact match “Oil States International, Inc.” Recorded in the RevenueBase company graph · Oct 28, 2026 · View company records in RevenueBase
18	Kpff Consulting Engineers	Exact match	Seattle, WA, United StatesHQ recorded Oct 28, 2026	1,001-5,000	1,588 contacts →
	Exact match “KPFF is a multi-office, multi-discipline engineering firm.” Recorded in the RevenueBase company graph · Oct 28, 2026 · View company records in RevenueBase
19	Atwell, LLC	Exact match	Southfield, MI, United StatesHQ recorded Oct 28, 2026	1,001-5,000	1,499 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 · Oct 28, 2026 · View company records in RevenueBase
20	Halliburton Energy Services	Exact match	Houston, TX, United StatesHQ recorded Oct 28, 2026	10001+	1,445 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 · Oct 28, 2026 · View company records in RevenueBase
21	Dril-Quip	Exact match	Houston, TX, United StatesHQ recorded Oct 28, 2026	1,001-5,000	1,427 contacts →
	Exact match “Dril-Quip is part of Innovex, a unique energy industrial platform.” Recorded in the RevenueBase company graph · Oct 28, 2026 · View company records in RevenueBase
22	Partner Engineering & Science, INC	Exact match	Torrance, CA, United StatesHQ recorded Oct 28, 2026	1,001-5,000	1,418 contacts →
	Exact match “Partner Assessment Corp.” Recorded in the RevenueBase company graph · Oct 28, 2026 · View company records in RevenueBase
23	Cudd Energy Services	Exact match	The Woodlands, TX, United StatesHQ recorded Oct 28, 2026	1,001-5,000	1,329 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 · Oct 28, 2026 · View company records in RevenueBase
24	Knight Piesold	Exact match	Denver, CO, United StatesHQ recorded Oct 28, 2026	1,001-5,000	1,326 contacts →
	Exact match “Knight Piésold is an employee-owned, global consulting firm providing specialist services to the mining, power, water resources, and infrastructure industries.” Recorded in the RevenueBase company graph · Oct 28, 2026 · View company records in RevenueBase
25	Englobal	Exact match	Houston, TX, United StatesHQ recorded Oct 28, 2026	201-500	1,203 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 · Oct 28, 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, gas & petroleum engineering services”. 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 3,692 oil, gas & petroleum engineering services based in the United States

See the full list, filter by size, metro and specialty, and access 71,510 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Oil, gas & petroleum engineering services based in the United States at a glance

As of Oct 28, 2026

28.6%Verified-email coverage

67.7Average contacts per company

11-50Median size (employees)

16.1%Largest-city concentration · Houston

Oct 28, 2026Page data refreshed

Companies by employee count

1-10

1,383

11-50

1,214

51-200

704

201-500

212

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 3,692 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, gas & petroleum engineering services” 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 71,510 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 October 28, 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, gas & petroleum engineering services 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, gas & petroleum engineering services”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many oil, gas & petroleum engineering services are there based in the United States?

RevenueBase identified 3,692 company matches for oil, gas & petroleum engineering services associated with the United States as of October 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, gas & petroleum engineering services?

Houston leads with 593 company records, followed by Midland (61) and Denver (47).

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 71,510 professional contacts with verified work emails tracked across these 3,692 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 October 28, 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.