Company lists · Data refreshed September 2026

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

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

Compiled by the RevenueBase Data Team Data refreshed Sep 5, 2026 2,332 companies tracked

RevenueBase identified 2,332 oil and gas consulting firms headquartered in the United States as of September 2026 and tracks 95,863 professional contacts across them, including 26,210 with verified work emails and 25,646 with mobile numbers. Houston is the largest hub.

This list covers oil and gas consulting firms 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 5, 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 5, 2026 86% judged on-target in blind review

2,332Companies

95,863Contacts tracked

26,210Verified emails

25,646Mobile numbers

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The 25 largest oil and gas consulting firms based in the United States

Ranked by team size

Top 25 of 2,332 oil and gas consulting firms based in the United States, ranked by team size, largest first. Data refreshed Sep 5, 2026. RevenueBase Smart Search rates how each company's information relates to oil and gas consulting firms: 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	Halliburton	Indirect evidence	Houston, TX, United StatesHQ checked Sep 5, 2026	10001+	53,380 contacts →
	Indirect evidence “We collaborate and engineer solutions to maximize asset value for our customers.” Source: RevenueBase Database · checked Sep 5, 2026
2	KEY Energy Services	Indirect evidence	Houston, TX, United StatesHQ checked Sep 5, 2026	1,001-5,000	2,755 contacts →
	Indirect evidence “Headquartered in Houston, Texas, Key Energy Services provides a wide array of leading edge energy production solutions and services.” Source: RevenueBase Database · checked Sep 5, 2026
3	Atwell, LLC	Partial evidence	Southfield, MI, United StatesHQ checked Sep 5, 2026	1,001-5,000	1,290 contacts →
	Partial evidence “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…” Source: RevenueBase Database · checked Sep 5, 2026
4	Cudd Energy Services	Strong evidence	The Woodlands, TX, United StatesHQ checked Sep 5, 2026	1,001-5,000	1,285 contacts →
	Strong evidence “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.” Source: RevenueBase Database · checked Sep 5, 2026
5	Barr Engineering CO	Partial evidence	Minneapolis, MN, United StatesHQ checked Sep 5, 2026	1,001-5,000	1,088 contacts →
	Partial evidence “Barr provides engineering and environmental consulting services to clients across the Midwest, throughout the Americas, and around the world.” Source: RevenueBase Database · checked Sep 5, 2026
6	Pioneer Energy Services	Indirect evidence	San Antonio, TX, United StatesHQ checked Sep 5, 2026	1,001-5,000	770 contacts →
	Indirect evidence “Pioneer Energy Services is now Patterson-UTI” Source: RevenueBase Database · checked Sep 5, 2026
7	Cleveland Integrity Services	Indirect evidence	Cleveland, OK, United StatesHQ checked Sep 5, 2026	1,001-5,000	761 contacts →
	Indirect evidence “Cleveland Integrity Services offers support services to companies in the Energy, Telecommunications, and Power industries.” Source: RevenueBase Database · checked Sep 5, 2026
8	EDG	Indirect evidence	Metairie, LA, United StatesHQ checked Sep 5, 2026	501-1,000	700 contacts →
	Indirect evidence “EDG Inc.” Source: RevenueBase Database · checked Sep 5, 2026
9	Consultec International INC	Strong evidence	Miami, FL, United StatesHQ checked Sep 5, 2026	501-1,000	580 contacts →
	Strong evidence “Somos una empresa multinacional líder en servicios de Consultoría de Oil & Gas, IT, Ingeniería, Recursos Humanos, Head Hunter y Proyectos” Source: RevenueBase Database · checked Sep 5, 2026
10	Applied Consultants	Indirect evidence	Longview, TX, United StatesHQ checked Sep 5, 2026	501-1,000	578 contacts →
	Indirect evidence “Since 1991, Applied Consultants Inc.” Source: RevenueBase Database · checked Sep 5, 2026
11	Island Operating Company	Strong evidence	Scott, LA, United StatesHQ checked Sep 5, 2026	1,001-5,000	570 contacts →
	Strong evidence “Improving efficiency and reducing costs, all while meeting safety requirements, is the challenge faced by every operator in the oil and gas industry.” Source: RevenueBase Database · checked Sep 5, 2026
12	BECHT	Indirect evidence	Liberty Corner, NJ, United StatesHQ checked Sep 5, 2026	501-1,000	545 contacts →
	Indirect evidence “Becht partners with industrial operators across the energy and process sectors to solve complex challenges that impact safety, reliability, and profitability.” Source: RevenueBase Database · checked Sep 5, 2026
13	Enervest, LTD	Strong evidence	Houston, TX, United StatesHQ checked Sep 5, 2026	201-500	424 contacts →
	Strong evidence “EnerVest is a top-tier, low-cost oil and natural gas operating company.” Source: RevenueBase Database · checked Sep 5, 2026
14	Recon Management Services, INC	Partial evidence	Sulphur, LA, United StatesHQ checked Sep 5, 2026	501-1,000	420 contacts →
	Partial evidence “ReCon was established in 1995 and has matured as a high quality and competitive engineering consulting firm providing engineering design and project management services to the…” Source: RevenueBase Database · checked Sep 5, 2026
15	OIL & GAS Jobs By Rigzone	Strong evidence	Houston, TX, United StatesHQ checked Sep 5, 2026	n/a	386 contacts →
	Strong evidence “Rigzone is the leading online resource for the oil and gas industry.” Source: RevenueBase Database · checked Sep 5, 2026
16	Express Energy Services	Indirect evidence	Houston, TX, United StatesHQ checked Sep 5, 2026	501-1,000	379 contacts →
	Indirect evidence “Express Energy Services, a leading oilfield services company, is active in every major hydrocarbon basin in the United States and is a premier provider of products and services…” Source: RevenueBase Database · checked Sep 5, 2026
17	Leam Drilling Services	Indirect evidence	New Iberia, LA, United StatesHQ checked Sep 5, 2026	501-1,000	291 contacts →
	Indirect evidence “LEAM Drilling Systems, Inc.” Source: RevenueBase Database · checked Sep 5, 2026
18	Greene's Energy Group	Strong evidence	Houston, TX, United StatesHQ checked Sep 5, 2026	201-500	285 contacts →
	Strong evidence “Greene’s Energy Group offers a range of support services and products to the oil and gas industry.” Source: RevenueBase Database · checked Sep 5, 2026
19	Lake Superior Consulting	Indirect evidence	Duluth, MN, United StatesHQ checked Sep 5, 2026	201-500	281 contacts →
	Indirect evidence “We act as an extension of your team, combining deep energy expertise with seamless alignment to your processes to advance projects with confidence.” Source: RevenueBase Database · checked Sep 5, 2026
20	Crosby Energy Services	Indirect evidence	Cut Off, LA, United StatesHQ checked Sep 5, 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 5, 2026
21	TJ Inspection, INC	Strong evidence	Oklahoma City, OK, United StatesHQ checked Sep 5, 2026	201-500	262 contacts →
	Strong evidence “Setting the Standard for Premier Inspection Services in the Oil & Gas Industry through our Dedication to Tradition / Talent / Technology / Teamwork TJ Inspection provides the…” Source: RevenueBase Database · checked Sep 5, 2026
22	M&h	Strong evidence	Spring, TX, United StatesHQ checked Sep 5, 2026	201-500	253 contacts →
	Strong evidence “For more than 40 years, M&H has been a trusted source for oil & gas consulting services that maximize value for clients.” Source: RevenueBase Database · checked Sep 5, 2026
23	NEW Tech Global	Strong evidence	Houston, TX, United StatesHQ checked Sep 5, 2026	51-200	245 contacts →
	Strong evidence “New Tech Global (NTG) is comprised of 5 different business units: New Tech Global Ventures: Upstream Oil & Gas consultancy services, and W-2 professional placement services for…” Source: RevenueBase Database · checked Sep 5, 2026
24	Cenergy International Services	Indirect evidence	Houston, TX, United StatesHQ checked Sep 5, 2026	1,001-5,000	239 contacts →
	Indirect evidence “Cenergy is a dynamic company that supplies expert workforce solutions to the World's Leading Industries.” Source: RevenueBase Database · checked Sep 5, 2026
25	Yellowjacket Oilfield Services	Indirect evidence	Houston, TX, United StatesHQ checked Sep 5, 2026	201-500	223 contacts →
	Indirect evidence “Yellowjacket Oilfield Services offers cost-effective solutions by leveraging state of the art equipment & technology along with superior personnel.” Source: RevenueBase Database · checked Sep 5, 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: oil and gas consulting firms. 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 oil and gas consulting firms.
Partial evidence: Its own public description names part of oil and gas consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name oil and gas consulting firms. 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 2,332 oil and gas consulting firms based in the United States

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

As of Sep 5, 2026

27.3%Verified-email coverage

26.8%Mobile-number coverage

41.1Average contacts per company

1-10Median size (employees)

24.5%Largest-city concentration · Houston

Sep 5, 2026Page data refreshed

Companies by employee count

1-10

1,259

11-50

680

51-200

282

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Freshness & accuracy

How recently the business emails on this list were verified

Email last verified

24,2650–30

1,50431–60

761–90

590–180

429180+

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 oil and gas consulting firms, 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 “oil and gas consulting firms”. 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 oil and gas consulting firms), 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 oil and gas consulting firms, 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, 26,210 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 5, 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.

Oil and gas consulting firms by metro

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 oil and gas consulting firms, 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 oil and gas consulting firms are there based in the United States?

RevenueBase identified 2,332 oil and gas consulting firms 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?

Halliburton, headquartered in Houston, tops this list with the largest team on record.

Which city has the most oil and gas consulting firms?

Houston leads with 572 headquartered companies, followed by Denver (70) and Midland (63).

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 26,210 verified decision-maker contacts tracked across these 2,332 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 5, 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.