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, how directly it supports the match, 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 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 HQ checked on every row Match evidence 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. Evidence rates how directly each company's own description names oil and gas consulting firms: strong (names it), partial (names part of it), indirect (matched on its full profile rather than the summary shown). Click a count to unlock that company's people.
#	Company	Headquarters	Employees	Contacts
1	HalliburtonIndirect evidence	Houston, TX, United StatesHQ checked Sep 5, 2026	10001+	53,380
	“We collaborate and engineer solutions to maximize asset value for our customers.” Source: company website · checked Sep 5, 2026
2	KEY Energy ServicesIndirect evidence	Houston, TX, United StatesHQ checked Sep 5, 2026	1,001-5,000	2,755
	“Headquartered in Houston, Texas, Key Energy Services provides a wide array of leading edge energy production solutions and services.” Source: company website · checked Sep 5, 2026
3	Atwell, LLCPartial evidence	Southfield, MI, United StatesHQ checked Sep 5, 2026	1,001-5,000	1,290
	“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: company website · checked Sep 5, 2026
4	Cudd Energy ServicesStrong evidence	The Woodlands, TX, United StatesHQ checked Sep 5, 2026	1,001-5,000	1,285
	“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: company website · checked Sep 5, 2026
5	Barr Engineering COPartial evidence	Minneapolis, MN, United StatesHQ checked Sep 5, 2026	1,001-5,000	1,088
	“Barr provides engineering and environmental consulting services to clients across the Midwest, throughout the Americas, and around the world.” Source: company website · checked Sep 5, 2026
6	Pioneer Energy ServicesIndirect evidence	San Antonio, TX, United StatesHQ checked Sep 5, 2026	1,001-5,000	770
	“Pioneer Energy Services is now Patterson-UTI” Source: company website · checked Sep 5, 2026
7	Cleveland Integrity ServicesIndirect evidence	Cleveland, OK, United StatesHQ checked Sep 5, 2026	1,001-5,000	761
	“Cleveland Integrity Services offers support services to companies in the Energy, Telecommunications, and Power industries.” Source: company website · checked Sep 5, 2026
8	EDGIndirect evidence	Metairie, LA, United StatesHQ checked Sep 5, 2026	501-1,000	700
	“EDG Inc.” Source: company website · checked Sep 5, 2026
9	Consultec International INCStrong evidence	Miami, FL, United StatesHQ checked Sep 5, 2026	501-1,000	580
	“Somos una empresa multinacional líder en servicios de Consultoría de Oil & Gas, IT, Ingeniería, Recursos Humanos, Head Hunter y Proyectos” Source: company website · checked Sep 5, 2026
10	Applied ConsultantsIndirect evidence	Longview, TX, United StatesHQ checked Sep 5, 2026	501-1,000	578
	“Since 1991, Applied Consultants Inc.” Source: company website · checked Sep 5, 2026
11	Island Operating CompanyStrong evidence	Scott, LA, United StatesHQ checked Sep 5, 2026	1,001-5,000	570
	“Improving efficiency and reducing costs, all while meeting safety requirements, is the challenge faced by every operator in the oil and gas industry.” Source: company website · checked Sep 5, 2026
12	BECHTIndirect evidence	Liberty Corner, NJ, United StatesHQ checked Sep 5, 2026	501-1,000	545
	“Becht partners with industrial operators across the energy and process sectors to solve complex challenges that impact safety, reliability, and profitability.” Source: company website · checked Sep 5, 2026
13	Enervest, LTDStrong evidence	Houston, TX, United StatesHQ checked Sep 5, 2026	201-500	424
	“EnerVest is a top-tier, low-cost oil and natural gas operating company.” Source: company website · checked Sep 5, 2026
14	Recon Management Services, INCPartial evidence	Sulphur, LA, United StatesHQ checked Sep 5, 2026	501-1,000	420
	“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: company website · checked Sep 5, 2026
15	OIL & GAS Jobs By RigzoneStrong evidence	Houston, TX, United StatesHQ checked Sep 5, 2026	n/a	386
	“Rigzone is the leading online resource for the oil and gas industry.” Source: company website · checked Sep 5, 2026
16	Express Energy ServicesIndirect evidence	Houston, TX, United StatesHQ checked Sep 5, 2026	501-1,000	379
	“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: company website · checked Sep 5, 2026
17	Leam Drilling ServicesIndirect evidence	New Iberia, LA, United StatesHQ checked Sep 5, 2026	501-1,000	291
	“LEAM Drilling Systems, Inc.” Source: company website · checked Sep 5, 2026
18	Greene's Energy GroupStrong evidence	Houston, TX, United StatesHQ checked Sep 5, 2026	201-500	285
	“Greene’s Energy Group offers a range of support services and products to the oil and gas industry.” Source: company website · checked Sep 5, 2026
19	Lake Superior ConsultingIndirect evidence	Duluth, MN, United StatesHQ checked Sep 5, 2026	201-500	281
	“We act as an extension of your team, combining deep energy expertise with seamless alignment to your processes to advance projects with confidence.” Source: company website · checked Sep 5, 2026
20	Crosby Energy ServicesIndirect evidence	Cut Off, LA, United StatesHQ checked Sep 5, 2026	201-500	272
	“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: company website · checked Sep 5, 2026
21	TJ Inspection, INCStrong evidence	Oklahoma City, OK, United StatesHQ checked Sep 5, 2026	201-500	262
	“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: company website · checked Sep 5, 2026
22	M&hStrong evidence	Spring, TX, United StatesHQ checked Sep 5, 2026	201-500	253
	“For more than 40 years, M&H has been a trusted source for oil & gas consulting services that maximize value for clients.” Source: company website · checked Sep 5, 2026
23	NEW Tech GlobalStrong evidence	Houston, TX, United StatesHQ checked Sep 5, 2026	51-200	245
	“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: company website · checked Sep 5, 2026
24	Cenergy International ServicesIndirect evidence	Houston, TX, United StatesHQ checked Sep 5, 2026	1,001-5,000	239
	“Cenergy is a dynamic company that supplies expert workforce solutions to the World's Leading Industries.” Source: company website · checked Sep 5, 2026
25	Yellowjacket Oilfield ServicesIndirect evidence	Houston, TX, United StatesHQ checked Sep 5, 2026	201-500	223
	“Yellowjacket Oilfield Services offers cost-effective solutions by leveraging state of the art equipment & technology along with superior personnel.” Source: company website · checked Sep 5, 2026

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

1-10Median size (employees)

HoustonLargest hub · 572 HQs

25,646Contacts with mobile numbers

Sep 5, 2026Data 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+

Verified emails by last verification

0–30

24,265

31–60

1,504

61–90

90–180

180+

429

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 evidence 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 SmartSearch, 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.
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 an evidence 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

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 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.