Company lists · Data refreshed September 2026

Top 25 Oil and gas consulting firms based in Houston, United States

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

Compiled by the RevenueBase Data Team Data refreshed Sep 14, 2026 572 companies tracked

RevenueBase identified 572 oil and gas consulting firms headquartered in Houston, United States as of September 2026 and tracks 67,073 professional contacts across them, including 17,898 with verified work emails. Across the United States, Houston is the largest hub for this category.

This list covers oil and gas consulting firms headquartered in Houston, 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 14, 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 14, 2026 86% judged on-target in blind review

572Companies

67,073Contacts tracked

17,898Verified emails

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

Ranked by team size

Top 25 of 572 oil and gas consulting firms based in Houston, United States, ranked by team size, largest first. Data refreshed Sep 14, 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 14, 2026	10001+	53,380 contacts →
	Indirect evidence “We collaborate and engineer solutions to maximize asset value for our customers.” Source: RevenueBase Database · checked Sep 14, 2026
2	KEY Energy Services	Indirect evidence	Houston, TX, United StatesHQ checked Sep 14, 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 14, 2026
3	Enervest, LTD	Strong evidence	Houston, TX, United StatesHQ checked Sep 14, 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 14, 2026
4	OIL & GAS Jobs By Rigzone	Strong evidence	Houston, TX, United StatesHQ checked Sep 14, 2026	n/a	386 contacts →
	Strong evidence “Rigzone is the leading online resource for the oil and gas industry.” Source: RevenueBase Database · checked Sep 14, 2026
5	Express Energy Services	Indirect evidence	Houston, TX, United StatesHQ checked Sep 14, 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 14, 2026
6	Greene's Energy Group	Strong evidence	Houston, TX, United StatesHQ checked Sep 14, 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 14, 2026
7	NEW Tech Global	Strong evidence	Houston, TX, United StatesHQ checked Sep 14, 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 14, 2026
8	Cenergy International Services	Indirect evidence	Houston, TX, United StatesHQ checked Sep 14, 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 14, 2026
9	Yellowjacket Oilfield Services	Indirect evidence	Houston, TX, United StatesHQ checked Sep 14, 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 14, 2026
10	Casedhole-Solutions, Inc.- A C&j Energy Company	Indirect evidence	Houston, TX, United StatesHQ checked Sep 14, 2026	501-1,000	191 contacts →
	Indirect evidence “Getting it done right.” Source: RevenueBase Database · checked Sep 14, 2026
11	Zentech Incorporated	Partial evidence	Houston, TX, United StatesHQ checked Sep 14, 2026	51-200	181 contacts →
	Partial evidence “Zentech, Inc, an engineering consulting and software development company, headquartered in Houston, TX, is comprised of experienced professionals specializing in providing…” Source: RevenueBase Database · checked Sep 14, 2026
12	EAG	Strong evidence	Houston, TX, United StatesHQ checked Sep 14, 2026	51-200	179 contacts →
	Strong evidence “EAG is a Houston-based, privately held consulting, back-office outsourcing, and IT outsourcing firm that delivers products and services primarily to the upstream and midstream oil…” Source: RevenueBase Database · checked Sep 14, 2026
13	Cima Energy, LP	Indirect evidence	Houston, TX, United StatesHQ checked Sep 14, 2026	51-200	160 contacts →
	Indirect evidence “CIMA® is a wholly owned subsidiary of Mitsubishi Corporation.” Source: RevenueBase Database · checked Sep 14, 2026
14	The Bergaila Companies	Strong evidence	Houston, TX, United StatesHQ checked Sep 14, 2026	501-1,000	154 contacts →
	Strong evidence “Since 1987, The Bergaila Companies have been matching talented people with great jobs in oil, gas, and energy.” Source: RevenueBase Database · checked Sep 14, 2026
15	Perc Engineering	Strong evidence	Houston, TX, United StatesHQ checked Sep 14, 2026	51-200	124 contacts →
	Strong evidence “PERC Engineering is a full-service engineering & project management firm in the oil & gas energy sector.” Source: RevenueBase Database · checked Sep 14, 2026
16	Edge Engineering And Science, LLC	Indirect evidence	Houston, TX, United StatesHQ checked Sep 14, 2026	51-200	116 contacts →
	Indirect evidence “Edge Engineering & Science, LLC (EDGE) is a privately owned professional services firm headquartered in Houston, Texas.” Source: RevenueBase Database · checked Sep 14, 2026
17	Bedrock	Indirect evidence	Houston, TX, United StatesHQ checked Sep 14, 2026	501-1,000	115 contacts →
	Indirect evidence “Bedrock Petroleum Consultants was formed in 2011 with the goal of providing the highest level of quality service to both our consultants and operator clients.” Source: RevenueBase Database · checked Sep 14, 2026
18	Ryder Scott Co. L.P	Indirect evidence	Houston, TX, United StatesHQ checked Sep 14, 2026	51-200	109 contacts →
	Indirect evidence “Ryder Scott Company, L.P.” Source: RevenueBase Database · checked Sep 14, 2026
19	Enertia Software	Strong evidence	Houston, TX, United StatesHQ checked Sep 14, 2026	51-200	108 contacts →
	Strong evidence “Enertia Software continues to lead the upstream oil and gas industry with integrated enterprise solutions for the upstream oil and gas industry.” Source: RevenueBase Database · checked Sep 14, 2026
20	Moduspec	Indirect evidence	Houston, TX, United StatesHQ checked Sep 14, 2026	201-500	101 contacts →
	Indirect evidence “ModuSpec first introduced the concept of rig inspection to the market in 1986 and since then, has been providing unrivalled expertise and assurance to support safe operations…” Source: RevenueBase Database · checked Sep 14, 2026
21	Stonebridge Consulting	Strong evidence	Houston, TX, United StatesHQ checked Sep 14, 2026	51-200	101 contacts →
	Strong evidence “Stonebridge Consulting provides business advisory and technology services for next-gen oil and gas.” Source: RevenueBase Database · checked Sep 14, 2026
22	G2 Integrated Solutions	Indirect evidence	Houston, TX, United StatesHQ checked Sep 14, 2026	201-500	101 contacts →
	Indirect evidence “G2 Integrated Solutions is dedicated to meeting the Asset Integrity, Regulatory and Engineering challenges faced by Upstream, Midstream and Downstream energy operators.” Source: RevenueBase Database · checked Sep 14, 2026
23	Oliva Gibbs	Indirect evidence	Houston, TX, United StatesHQ checked Sep 14, 2026	51-200	92 contacts →
	Indirect evidence “Oliva Gibbs is a nationally recognized law firm with offices in Columbus, OH, Houston, TX, Lafayette, LA, Midland, TX, Oklahoma City, OK, and San Antonio, TX.” Source: RevenueBase Database · checked Sep 14, 2026
24	BD Energy Systems, LLC	Partial evidence	Houston, TX, United StatesHQ checked Sep 14, 2026	51-200	65 contacts →
	Partial evidence “BD Energy Systems LLC located in Houston, TX, USA is a world leading engineering company operating in the Petrochemical, Fertilizer, Refining, and Gas Processing industry…” Source: RevenueBase Database · checked Sep 14, 2026
25	RCP INC	Indirect evidence	Houston, TX, United StatesHQ checked Sep 14, 2026	51-200	63 contacts →
	Indirect evidence “RCP is the regulatory compliance and risk management expert for pipelines, facilities, and terminal operations.” Source: RevenueBase Database · checked Sep 14, 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 572 oil and gas consulting firms based in Houston, United States

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

As of Sep 14, 2026

26.7%Verified-email coverage

117.3Average contacts per company

1-10Median size (employees)

Sep 14, 2026Page data refreshed

Companies by employee count

1-10

314

11-50

170

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency for this list is measured across the whole United States list rather than for Houston, so it is reported there. Company counts and contact totals on this page are exact for Houston, over 572 companies.

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 Houston, 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 Houston 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, 17,898 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 14, 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 in the United States

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 Houston, United States?

RevenueBase identified 572 oil and gas consulting firms headquartered in Houston, 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 in the United States has the most oil and gas consulting firms?

Houston leads the United States 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 17,898 verified decision-maker contacts tracked across these 572 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 14, 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.