Company lists · Data refreshed September 2026

Top 25 Energy engineering consulting firms based in Houston, United States

Name: Energy engineering 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 24, 2026 298 companies tracked

RevenueBase identified 298 energy engineering consulting firms headquartered in Houston, United States as of September 2026 and tracks 31,676 professional contacts across them, including 9,341 with verified work emails. Across the United States, Houston is the largest hub for this category.

This list covers energy engineering 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 24, 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 24, 2026 86% judged on-target in blind review

298Companies

31,676Contacts tracked

9,341Verified emails

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The 25 largest energy engineering consulting firms based in Houston, United States

Ranked by team size

Top 25 of 298 energy engineering consulting firms based in Houston, United States, ranked by team size, largest first. Data refreshed Sep 24, 2026. RevenueBase Smart Search rates how each company's information relates to energy engineering 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	Mcdermott International, LTD	Strong evidence	Houston, TX, United StatesHQ checked Sep 24, 2026	10001+	20,135 contacts →
	Strong evidence “McDermott is a premier provider of engineering and construction solutions to the energy industry.” Source: RevenueBase Database · checked Sep 24, 2026
2	LJA	Indirect evidence	Houston, TX, United StatesHQ checked Sep 24, 2026	1,001-5,000	1,932 contacts →
	Indirect evidence “Employee-Owned.” Source: RevenueBase Database · checked Sep 24, 2026
3	Audubon Companies	Strong evidence	Houston, TX, United StatesHQ checked Sep 24, 2026	1,001-5,000	1,488 contacts →
	Strong evidence “Founded in 1997, Audubon Companies LLC provides EPC, consulting, fabrication, and field services to energy and industrial operators across the globe.” Source: RevenueBase Database · checked Sep 24, 2026
4	Gulf Companies	Partial evidence	Houston, TX, United StatesHQ checked Sep 24, 2026	1,001-5,000	1,046 contacts →
	Partial evidence “At Gulf Companies, we are driven by our mission to serve a vital role in the global energy industry.” Source: RevenueBase Database · checked Sep 24, 2026
5	Scmi INC	Indirect evidence	Houston, TX, United StatesHQ checked Sep 24, 2026	n/a	470 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 24, 2026
6	ARION	Partial evidence	Houston, TX, United StatesHQ checked Sep 24, 2026	201-500	310 contacts →
	Partial evidence “We are A-Team of engineers specializing in the energy industry.” Source: RevenueBase Database · checked Sep 24, 2026
7	DBR	Partial evidence	Houston, TX, United StatesHQ checked Sep 24, 2026	201-500	227 contacts →
	Partial evidence “Founded in 1972, DBR has evolved into the premier MEP engineering firm in Texas, providing mechanical, electrical, and plumbing engineering services, as well as building…” Source: RevenueBase Database · checked Sep 24, 2026
8	Zentech Incorporated	Strong evidence	Houston, TX, United StatesHQ checked Sep 24, 2026	51-200	181 contacts →
	Strong 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 24, 2026
9	Ceis Critical Energy Infrastructure Services	Partial evidence	Houston, TX, United StatesHQ checked Sep 24, 2026	201-500	145 contacts →
	Partial evidence “Critical Energy Infrastructure Services (CEIS) is a nationally recognized leader in delivering strategic project solutions that support America’s energy infrastructure and…” Source: RevenueBase Database · checked Sep 24, 2026
10	Shah Smith & Associates, INC	Strong evidence	Houston, TX, United StatesHQ checked Sep 24, 2026	51-200	134 contacts →
	Strong evidence “Shah Smith & Associates, Inc.(SSA) is a 120+ employee Mechanical, Electrical, and Plumbing (MEP) consulting engineering firm with offices in Houston, Austin & Dallas.” Source: RevenueBase Database · checked Sep 24, 2026
11	Holloman Corporation	Strong evidence	Houston, TX, United StatesHQ checked Sep 24, 2026	501-1,000	125 contacts →
	Strong evidence “Holloman Corporation is an Engineering, Procurement, and Construction company with capabilities to design, build, and service energy-related projects on a global level.” Source: RevenueBase Database · checked Sep 24, 2026
12	Perc Engineering	Strong evidence	Houston, TX, United StatesHQ checked Sep 24, 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 24, 2026
13	S&b Infrastructure, LTD	Partial evidence	Houston, TX, United StatesHQ checked Sep 24, 2026	51-200	97 contacts →
	Partial evidence “S&B Infrastructure, Ltd.(S & BI) has been in existence since 1994 as part of S&B Holdings, Ltd,(one of the largest privately-owned engineering firms in the State of Texas).” Source: RevenueBase Database · checked Sep 24, 2026
14	E'kabel	Partial evidence	Houston, TX, United StatesHQ checked Sep 24, 2026	51-200	96 contacts →
	Partial evidence “At E’kabel, we design and implement solutions that drive efficiency, sustainability, and performance across energy operations.” Source: RevenueBase Database · checked Sep 24, 2026
15	Civitas Engineering Group, INC	Partial evidence	Houston, TX, United StatesHQ checked Sep 24, 2026	51-200	65 contacts →
	Partial evidence “Civitas Engineering Group Inc.” Source: RevenueBase Database · checked Sep 24, 2026
16	BD Energy Systems, LLC	Strong evidence	Houston, TX, United StatesHQ checked Sep 24, 2026	51-200	65 contacts →
	Strong 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 24, 2026
17	RCP INC	Indirect evidence	Houston, TX, United StatesHQ checked Sep 24, 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 24, 2026
18	Decon LLC	Strong evidence	Houston, TX, United StatesHQ checked Sep 24, 2026	11-50	55 contacts →
	Strong evidence “MBE \| SBE \| DBE \| HUB \| HHF, TBPE Firm No 16156 DECON LLC,founded by Fulvio Jaramillo, a consulting engineering firm committed to technical excellence, DECON’s services help…” Source: RevenueBase Database · checked Sep 24, 2026
19	MEP Green Design & Build, Pllc	Partial evidence	Houston, TX, United StatesHQ checked Sep 24, 2026	51-200	53 contacts →
	Partial evidence “MEP Green Design & Build, PLLC,(MEPG) is a full-service engineering firm made up of a dedicated team of professionals offering expertise in Mechanical, Electrical, Plumbing and…” Source: RevenueBase Database · checked Sep 24, 2026
20	Blackline Engineering, LLC	Strong evidence	Houston, TX, United StatesHQ checked Sep 24, 2026	11-50	46 contacts →
	Strong evidence “Blackline Engineering, LLC is a Houston based engineering consulting firm that offers innovative design and project management services that are tailored for each client.” Source: RevenueBase Database · checked Sep 24, 2026
21	I. A. Naman Associates, INC	Indirect evidence	Houston, TX, United StatesHQ checked Sep 24, 2026	11-50	46 contacts →
	Indirect evidence “Since 1947, I.” Source: RevenueBase Database · checked Sep 24, 2026
22	RPT Alliance LLC	Indirect evidence	Houston, TX, United StatesHQ checked Sep 24, 2026	11-50	43 contacts →
	Indirect evidence “As of December 8, 2025, RTP Alliance has been acquired by by Bowman.” Source: RevenueBase Database · checked Sep 24, 2026
23	TKE Engineering & Design	Indirect evidence	Houston, TX, United StatesHQ checked Sep 24, 2026	11-50	39 contacts →
	Indirect evidence “Who We Are TKE was founded in Houston, Texas in 1992 by Terry Eleiott, PE and his wife Kathy Eleiott.” Source: RevenueBase Database · checked Sep 24, 2026
24	Priserve Consulting INC	Partial evidence	Houston, TX, United StatesHQ checked Sep 24, 2026	51-200	38 contacts →
	Partial evidence “PriServe Group company engaged in Technology and Engineering Services” Source: RevenueBase Database · checked Sep 24, 2026
25	Ch-Iv International	Indirect evidence	Houston, TX, United StatesHQ checked Sep 24, 2026	11-50	32 contacts →
	Indirect evidence “As an extension of the Owner's team, we support Project Development and Asset Life Extensions through decades of experience and deep industry expertise.” Source: RevenueBase Database · checked Sep 24, 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: energy engineering 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 energy engineering consulting firms.
Partial evidence: Its own public description names part of energy engineering consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name energy engineering 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 298 energy engineering consulting firms based in Houston, United States

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Energy engineering consulting firms based in Houston, United States at a glance

As of Sep 24, 2026

29.5%Verified-email coverage

106.3Average contacts per company

11-50Median size (employees)

Sep 24, 2026Page data refreshed

Companies by employee count

1-10

144

11-50

104

51-200

201-500

501-1,000

1,001-5,000

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 298 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 energy engineering 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 “energy engineering 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 energy engineering 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 energy engineering 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, 9,341 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 24, 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.

Energy engineering 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 energy engineering 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 energy engineering consulting firms are there based in Houston, United States?

RevenueBase identified 298 energy engineering 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?

Mcdermott International, LTD, headquartered in Houston, tops this list with the largest team on record.

Which city in the United States has the most energy engineering consulting firms?

Houston leads the United States with 298 headquartered companies, followed by New York (190) and Austin (99).

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 9,341 verified decision-maker contacts tracked across these 298 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 24, 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.