Company lists · Data refreshed September 2026

Top 25 Gas consulting firms based in the United States

Name: 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 21, 2026 967 companies tracked

RevenueBase identified 967 gas consulting firms headquartered in the United States as of September 2026 and tracks 17,882 professional contacts across them, including 6,044 with verified work emails. Houston is the largest hub.

This list covers 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 21, 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 21, 2026 86% judged on-target in blind review

967Companies

17,882Contacts tracked

6,044Verified emails

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The 25 largest gas consulting firms based in the United States

Ranked by team size

Top 25 of 967 gas consulting firms based in the United States, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to 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	Barr Engineering CO	Partial evidence	Minneapolis, MN, United StatesHQ checked Sep 21, 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 21, 2026
2	Pioneer Energy Services	Indirect evidence	San Antonio, TX, United StatesHQ checked Sep 21, 2026	1,001-5,000	770 contacts →
	Indirect evidence “Pioneer Energy Services is now Patterson-UTI” Source: RevenueBase Database · checked Sep 21, 2026
3	Cleveland Integrity Services	Indirect evidence	Cleveland, OK, United StatesHQ checked Sep 21, 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 21, 2026
4	EDG	Indirect evidence	Metairie, LA, United StatesHQ checked Sep 21, 2026	501-1,000	700 contacts →
	Indirect evidence “EDG Inc.” Source: RevenueBase Database · checked Sep 21, 2026
5	Applied Consultants	Indirect evidence	Longview, TX, United StatesHQ checked Sep 21, 2026	501-1,000	578 contacts →
	Indirect evidence “Since 1991, Applied Consultants Inc.” Source: RevenueBase Database · checked Sep 21, 2026
6	E2 Consulting Engineers, INC	Partial evidence	Emeryville, CA, United StatesHQ checked Sep 21, 2026	501-1,000	526 contacts →
	Partial evidence “Dedicated to “Excellence in Engineering,” E2 Consulting Engineers, Inc.(E2) is a professional services firm established in 1988 specializing in a full spectrum of engineering…” Source: RevenueBase Database · checked Sep 21, 2026
7	Hunt Guillot & Associates HGA	Partial evidence	Ruston, LA, United StatesHQ checked Sep 21, 2026	501-1,000	505 contacts →
	Partial evidence “HGA is a leading engineering, consulting, and program management company that has been delivering innovative and sustainable solutions to our clients for over 29 years.” Source: RevenueBase Database · checked Sep 21, 2026
8	Enervest, LTD	Partial evidence	Houston, TX, United StatesHQ checked Sep 21, 2026	201-500	424 contacts →
	Partial evidence “EnerVest is a top-tier, low-cost oil and natural gas operating company.” Source: RevenueBase Database · checked Sep 21, 2026
9	Southeast Connections LLC	Partial evidence	Conyers, GA, United StatesHQ checked Sep 21, 2026	1,001-5,000	374 contacts →
	Partial evidence “Since 1996 Southeast Connections, LLC is a contractor specializing in energy infrastructure serving the gas industry.” Source: RevenueBase Database · checked Sep 21, 2026
10	Manhard Consulting	Partial evidence	Lincolnshire, IL, United StatesHQ checked Sep 21, 2026	201-500	365 contacts →
	Partial evidence “Manhard Consulting has joined Atwell, a national consulting, engineering, and construction services firm with 2,100 technical professionals across the country.” Source: RevenueBase Database · checked Sep 21, 2026
11	Crosby Energy Services	Indirect evidence	Cut Off, LA, United StatesHQ checked Sep 21, 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 21, 2026
12	Merjent	Partial evidence	Minneapolis, MN, United StatesHQ checked Sep 21, 2026	201-500	264 contacts →
	Partial evidence “Merjent is an environmental, restoration, and engineering consulting firm with a long history serving the energy industry.” Source: RevenueBase Database · checked Sep 21, 2026
13	M&h	Strong evidence	Spring, TX, United StatesHQ checked Sep 21, 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 21, 2026
14	Project Consulting Services	Partial evidence	Metairie, LA, United StatesHQ checked Sep 21, 2026	201-500	185 contacts →
	Partial evidence “Project Consulting Services®, Inc.(PCS) provides consulting and engineering expertise to the energy infrastructure industry.” Source: RevenueBase Database · checked Sep 21, 2026
15	Utilicast	Partial evidence	Seattle, WA, United StatesHQ checked Sep 21, 2026	201-500	181 contacts →
	Partial evidence “Utilicast is more than just a consulting company.” Source: RevenueBase Database · checked Sep 21, 2026
16	Canacre	Indirect evidence	Scottsdale, AZ, United StatesHQ checked Sep 21, 2026	201-500	172 contacts →
	Indirect evidence “Canacre is an infrastructure development consultant specializing in project management, land acquisition, environment, GIS analysis, data management, web-based mapping, community…” Source: RevenueBase Database · checked Sep 21, 2026
17	Tph&co	Indirect evidence	Houston, TX, United StatesHQ checked Sep 21, 2026	201-500	171 contacts →
	Indirect evidence “TPH & Co, the energy business of Perella Weinberg, provides strategic and financial advice to investors, management teams, boards of directors, government bodies, and other…” Source: RevenueBase Database · checked Sep 21, 2026
18	Morrison Energy	Partial evidence	Houma, LA, United StatesHQ checked Sep 21, 2026	501-1,000	143 contacts →
	Partial evidence “Morrison, an energy service company, delivers infrastructure projects to clients in the oil and gas and renewables industries.” Source: RevenueBase Database · checked Sep 21, 2026
19	GAS Transmission Systems, Inc. GTS	Indirect evidence	Walnut Creek, CA, United StatesHQ checked Sep 21, 2026	201-500	138 contacts →
	Indirect evidence “The Kleinfelder Group, Inc.(“Kleinfelder”), a leading engineering, design, construction management, construction materials inspection and testing, and environmental professional…” Source: RevenueBase Database · checked Sep 21, 2026
20	Petrotel	Indirect evidence	Plano, TX, United StatesHQ checked Sep 21, 2026	51-200	134 contacts →
	Indirect evidence “PetroTel is recognized worldwide as an industry leader in enhanced oil recovery, reservoir characterization and simulation, coalbed methane, production, and exploration…” Source: RevenueBase Database · checked Sep 21, 2026
21	Merit Advisors, LLC	Indirect evidence	Dallas, TX, United StatesHQ checked Sep 21, 2026	51-200	128 contacts →
	Indirect evidence “Merit Advisors provides our partners in the energy industry with the best financial solutions and vision to uncover overlooked savings.” Source: RevenueBase Database · checked Sep 21, 2026
22	SDS Petroleum Consultants	Indirect evidence	Tyler, TX, United StatesHQ checked Sep 21, 2026	51-200	122 contacts →
	Indirect evidence “Welcome to SDS Petroleum Consultants company page In Scott Stovall founded SDS Petroleum Consultants L.L.C.” Source: RevenueBase Database · checked Sep 21, 2026
23	Halker	Partial evidence	Centennial, CO, United StatesHQ checked Sep 21, 2026	51-200	121 contacts →
	Partial evidence “Halker Consulting provides custom engineered and configured services in Project Assessment and Planning, Engineering and Design, & Consulting and Implementation Guidance.” Source: RevenueBase Database · checked Sep 21, 2026
24	Sequent Energy Management	Indirect evidence	Houston, TX, United StatesHQ checked Sep 21, 2026	51-200	118 contacts →
	Indirect evidence “Williams completed its acquisition of Sequent Energy Management, L.P.” Source: RevenueBase Database · checked Sep 21, 2026
25	Bedrock	Indirect evidence	Houston, TX, United StatesHQ checked Sep 21, 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 21, 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: 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 gas consulting firms.
Partial evidence: Its own public description names part of 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 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 967 gas consulting firms based in the United States

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Gas consulting firms based in the United States at a glance

As of Sep 21, 2026

33.8%Verified-email coverage

18.5Average contacts per company

1-10Median size (employees)

21.4%Largest-city concentration · Houston

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

551

11-50

274

51-200

101

201-500

501-1,000

1,001-5,000

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 967 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 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 “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 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 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, 6,044 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 21, 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.

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 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 gas consulting firms are there based in the United States?

RevenueBase identified 967 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?

Barr Engineering CO, headquartered in Minneapolis, tops this list with the largest team on record.

Which city has the most gas consulting firms?

Houston leads with 207 headquartered companies, followed by Denver (35) and Dallas (28).

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 6,044 verified decision-maker contacts tracked across these 967 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 21, 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.