Company lists · Data refreshed September 2026

Top 25 Electrical infrastructure consulting firms based in Houston, United States

RevenueBase identified 365 electrical infrastructure consulting firms headquartered in Houston, United States as of September 2026 and tracks 22,921 professional contacts across them, including 8,716 with verified work emails. Across the United States, Houston is the largest hub for this category.

This list covers electrical infrastructure 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 29, 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 29, 2026 86% judged on-target in blind review
365Companies
22,921Contacts tracked
8,716Verified emails
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The 25 largest electrical infrastructure consulting firms based in Houston, United States

Ranked by team size
Top 25 of 365 electrical infrastructure consulting firms based in Houston, United States, ranked by team size, largest first. Data refreshed Sep 29, 2026. RevenueBase Smart Search rates how each company's information relates to electrical infrastructure 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.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1Partial evidenceHouston, TX, United StatesHQ checked Sep 29, 20265,001-10,0002,567 contacts →

Partial evidence

“IES Holdings, Inc.(formerly known as Integrated Electrical Services, Inc.) provides electrical contracting services to commercial, industrial, and residential customers in the…”

Source: RevenueBase Database · checked Sep 29, 2026
2Indirect evidenceHouston, TX, United StatesHQ checked Sep 29, 202610001+1,783 contacts →

Indirect evidence

“Quanta Services (NYSE: PWR) is the leading specialty contractor with the largest and highly trained skilled workforce in North America, providing fully integrated solutions for…”

Source: RevenueBase Database · checked Sep 29, 2026
3Indirect evidenceHouston, TX, United StatesHQ checked Sep 29, 20261,001-5,0001,298 contacts →

Indirect evidence

“Welcome to Walter P Moore!”

Source: RevenueBase Database · checked Sep 29, 2026
4Indirect evidenceHouston, TX, United StatesHQ checked Sep 29, 20261,001-5,0001,184 contacts →

Indirect evidence

“Consultants.”

Source: RevenueBase Database · checked Sep 29, 2026
5Indirect evidenceHouston, TX, United StatesHQ checked Sep 29, 20261,001-5,0001,112 contacts →

Indirect evidence

“Ranked No.”

Source: RevenueBase Database · checked Sep 29, 2026
6Partial evidenceHouston, TX, United StatesHQ checked Sep 29, 20261,001-5,000940 contacts →

Partial evidence

“Dashiell is a leading national provider of technical services to the electric utility, power generation, industrial, renewable and energy industries.”

Source: RevenueBase Database · checked Sep 29, 2026
7Partial evidenceHouston, TX, United StatesHQ checked Sep 29, 202610001+665 contacts →

Partial evidence

“Primoris is a specialty energy infrastructure contractor serving the oil and gas and power industries with offerings that primarily include construction, maintenance and…”

Source: RevenueBase Database · checked Sep 29, 2026
8Partial evidenceHouston, TX, United StatesHQ checked Sep 29, 2026501-1,000544 contacts →

Partial evidence

“Wholesale Electric Supply Company of Houston, Inc.”

Source: RevenueBase Database · checked Sep 29, 2026
9Strong evidenceHouston, TX, United StatesHQ checked Sep 29, 2026501-1,000538 contacts →

Strong evidence

“Quanta Infrastructure Solutions Group (QISG) is a recognized leader in EPC, design-build, and CMAR services for electrical infrastructure, wastewater and specialty projects…”

Source: RevenueBase Database · checked Sep 29, 2026
10Partial evidenceHouston, TX, United StatesHQ checked Sep 29, 2026501-1,000524 contacts →

Partial evidence

“Cobb, Fendley & Associates, Inc.(CobbFendley) is a nationally recognized infrastructure solutions firm with a regional focus and a commitment to excellence.”

Source: RevenueBase Database · checked Sep 29, 2026
11Partial evidenceHouston, TX, United StatesHQ checked Sep 29, 20261,001-5,000521 contacts →

Partial evidence

“Saber Power Services, a portfolio company of Greenbelt Capital Partners, is a fully integrated electrical power system services firm providing end-to-end solutions across utility…”

Source: RevenueBase Database · checked Sep 29, 2026
12Indirect evidenceHouston, TX, United StatesHQ checked Sep 29, 20261,001-5,000511 contacts →

Indirect evidence

“RESA Power is your ONE-STOP for all of your power needs.”

Source: RevenueBase Database · checked Sep 29, 2026
13Partial evidenceHouston, TX, United StatesHQ checked Sep 29, 2026201-500461 contacts →

Partial evidence

“Lockwood, Andrews & Newnam, Inc.(LAN) is a full-service consulting firm offering planning, engineering and program management services.”

Source: RevenueBase Database · checked Sep 29, 2026
14Partial evidenceHouston, TX, United StatesHQ checked Sep 29, 20261,001-5,000423 contacts →

Partial evidence

“As a division of one of America's largest construction companies (Tutor Perini Corporation), Fisk Electric Company provides the highest standards of electrical construction…”

Source: RevenueBase Database · checked Sep 29, 2026
15Indirect evidenceHouston, TX, United StatesHQ checked Sep 29, 2026201-500377 contacts →

Indirect evidence

“For decades, E Source has been a trusted partner to utilities navigating an evolving energy landscape.”

Source: RevenueBase Database · checked Sep 29, 2026
16Partial evidenceHouston, TX, United StatesHQ checked Sep 29, 2026501-1,000331 contacts →

Partial evidence

“Solaris Energy Infrastructure (NYSE: SEI) delivers proprietary power generation and distribution solutions, as well as logistics equipment and services, to clients in the data…”

Source: RevenueBase Database · checked Sep 29, 2026
17Indirect evidenceHouston, TX, United StatesHQ checked Sep 29, 2026201-500310 contacts →

Indirect evidence

“We are A-Team of engineers specializing in the energy industry.”

Source: RevenueBase Database · checked Sep 29, 2026
18Indirect evidenceHouston, TX, United StatesHQ checked Sep 29, 2026201-500260 contacts →

Indirect evidence

“Founded in 1993, Tolunay-Wong Engineers, Inc.(TWE) is ranked as one of the Top 10 largest civil engineering firms in Houston.”

Source: RevenueBase Database · checked Sep 29, 2026
19Partial evidenceHouston, TX, United StatesHQ checked Sep 29, 2026201-500227 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 29, 2026
20Partial evidenceHouston, TX, United StatesHQ checked Sep 29, 202651-200199 contacts →

Partial evidence

“Completing public infrastructure projects comes with tremendous pressure to serve the public while completing each project on-time and on-budget.”

Source: RevenueBase Database · checked Sep 29, 2026
21Indirect evidenceHouston, TX, United StatesHQ checked Sep 29, 2026201-500189 contacts →

Indirect evidence

“GATE Energy, a 100% employee-owned ESOP, provides predictable project delivery services to the energy sector.”

Source: RevenueBase Database · checked Sep 29, 2026
22Partial evidenceHouston, TX, United StatesHQ checked Sep 29, 2026201-500189 contacts →

Partial evidence

“Trio Electric was founded in 2003.”

Source: RevenueBase Database · checked Sep 29, 2026
23Strong evidenceHouston, TX, United StatesHQ checked Sep 29, 2026501-1,000188 contacts →

Strong evidence

“Expanse Electrical Company is a premier provider of integrated electrical infrastructure, instrumentation and automation system solutions.”

Source: RevenueBase Database · checked Sep 29, 2026
24Partial evidenceHouston, TX, United StatesHQ checked Sep 29, 202651-200182 contacts →

Partial evidence

“Founded in 1970, IDS Engineering Group is a Houston-based civil engineering and surveying firm with over five decades of experience delivering infrastructure solutions for public…”

Source: RevenueBase Database · checked Sep 29, 2026
25Partial evidenceHouston, TX, United StatesHQ checked Sep 29, 202651-200181 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 29, 2026

Showing 25 of 365 electrical infrastructure consulting firms based in Houston, United States

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Electrical infrastructure consulting firms based in Houston, United States at a glance

As of Sep 29, 2026
38.0%Verified-email coverage
62.8Average contacts per company
11-50Median size (employees)
Sep 29, 2026Page data refreshed

Companies by employee count

1-10
141
11-50
131
51-200
44
201-500
23
501-1,000
10
1,001-5,000
11
5,001-10,000
2
10001+
2

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 365 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 electrical infrastructure 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 “electrical infrastructure 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 electrical infrastructure 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 electrical infrastructure 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, 8,716 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 29, 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.

Electrical infrastructure 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 electrical infrastructure 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 electrical infrastructure consulting firms are there based in Houston, United States?

RevenueBase identified 365 electrical infrastructure 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?

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

Which city in the United States has the most electrical infrastructure consulting firms?

Houston leads the United States with 365 headquartered companies, followed by New York (222) and Miami (115).

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 8,716 verified decision-maker contacts tracked across these 365 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 29, 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.