Company lists · Data refreshed November 2026

Top 25 Electrical testing contractors based in the United States

RevenueBase identified 6,002 company matches for electrical testing contractors associated with the United States as of November 2026 and tracks 73,583 professional contacts across them, including 23,009 with verified work emails. Houston is the largest hub.

This list covers company matches for electrical testing contractors associated with the United States, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed November 6, 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 RevenueBase SmartSearch · Exact Recorded Nov 6, 2026 How this list was built
6,002Companies
73,583Contacts tracked
23,009Verified emails
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The 25 largest electrical testing contractors based in the United States

Ranked by team size
Top 25 of 6,002 company matches for electrical testing contractors based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 6, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchHouston, TX, United StatesHQ recorded Nov 6, 20265,001-10,0002,710 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2Exact matchIrving, OK, United StatesHQ recorded Nov 6, 20261,001-5,0001,324 contacts →

Exact match

“Shermco Industries is a provider of safe, reliable testing, repair, professional training, electrical outage planning, maintenance and analysis of rotating apparatus and…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3Exact matchLong Beach, CA, United StatesHQ recorded Nov 6, 2026n/a787 contacts →

Exact match

“WELCOME TO OUR WEBSITE!”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
4Exact matchGarland, TX, United StatesHQ recorded Nov 6, 20261,001-5,000752 contacts →

Exact match

“Our story began in 1994 with a simple vision: Build a company that does things right.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5Exact matchLogan, UT, United StatesHQ recorded Nov 6, 20261,001-5,000691 contacts →

Exact match

“As one of the nation’s premier electrical contractors, we don’t just provide high-quality services.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6Exact matchMaryland Heights, MI, United StatesHQ recorded Nov 6, 2026501-1,000678 contacts →

Exact match

“Electric Power Systems is an independent electrical testing & engineering organization.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7Exact matchMarlborough, MA, United StatesHQ recorded Nov 6, 2026501-1,000662 contacts →

Exact match

“Doble is the world’s most trusted brand in electrical diagnostics.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8Exact matchLive Oak, TX, United StatesHQ recorded Nov 6, 2026501-1,000632 contacts →

Exact match

“Since 1923, Alterman has provided electrical construction on many of San Antonio and Austin's most impressive landmarks and contemporary structures.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9Exact matchSanta Fe Springs, CA, United StatesHQ recorded Nov 6, 20261,001-5,000595 contacts →

Exact match

“Founded in 1990, CSI has become a leader in highly technical and innovative electrical design and construction.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10Exact matchEagan, MN, United StatesHQ recorded Nov 6, 20261,001-5,000572 contacts →

Exact match

“Hunt Electric is a national electrical design, build, and maintenance firm based in Eagan, MN.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11Exact matchCity Of Industry, CA, United StatesHQ recorded Nov 6, 20261,001-5,000567 contacts →

Exact match

“With over six decades of experience, Morrow-Meadows Corporation (MMC) is a full-service electrical contracting company able to fulfill our customer’s every electrical need, no…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12Exact matchPortland, OR, United StatesHQ recorded Nov 6, 20261,001-5,000541 contacts →

Exact match

“Our lives function on a power grid.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13Exact matchLexington, KY, United StatesHQ recorded Nov 6, 2026501-1,000506 contacts →

Exact match

“Amteck is one of Kentucky’s largest privately held electrical construction firms, providing design-build electrical construction services for a wide variety of facilities…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14Exact matchNew York, NY, United StatesHQ recorded Nov 6, 20261,001-5,000498 contacts →

Exact match

“Welcome to SOCOTEC in the US, Trusted Expertise, From the Ground Up.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15Exact matchLong Island City, NY, United StatesHQ recorded Nov 6, 20261,001-5,000495 contacts →

Exact match

“The E-J Group is active in all facets of electrical contracting, bringing experience, expertise, and a national reputation to projects that range in size up to more than $1…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16Exact matchValdosta, GA, United StatesHQ recorded Nov 6, 20261,001-5,000494 contacts →

Exact match

“Ace Electric is a family-owned/operated electrical contractor performing safe and high-quality work for clients throughout the United States.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17Exact matchMableton, GA, United StatesHQ recorded Nov 6, 2026501-1,000483 contacts →

Exact match

“Inglett & Stubbs LLC is a recognized leader in the electrical construction industry today.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18Exact matchSt. Louis, MO, United StatesHQ recorded Nov 6, 2026501-1,000453 contacts →

Exact match

“A full-service electrical contractor since 1902, providing capability, performance, and legendary innovation in new construction, design-build, low-voltage systems, energy…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19Exact matchSanford, FL, United StatesHQ recorded Nov 6, 20261,001-5,000415 contacts →

Exact match

“Strada Services is a full service electrical, security, and air conditioning contracting company servicing residential, commercial, and industrial customers in Florida and in the…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20Exact matchTempe, AZ, United StatesHQ recorded Nov 6, 20261,001-5,000401 contacts →

Exact match

“DP Electric (DPE) has a long history as a dedicated trade partner.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21Exact matchChandler, PA, United StatesHQ recorded Nov 6, 2026201-500375 contacts →

Exact match

“Life Cycle Testing, Inspection, Certification & Engineering Solutions for Mission Critical Facilities Worldwide Commitment to Diversity – FST is dedicated to non-discriminatory…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22Exact matchSalt Lake City, UT, United StatesHQ recorded Nov 6, 2026501-1,000372 contacts →

Exact match

“Hunt Electric is an industry-leading electrical contractor serving commercial, industrial, mission critical, mining, infrastructure, and numerous other sectors.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23Exact matchIrondale, AL, United StatesHQ recorded Nov 6, 2026501-1,000360 contacts →

Exact match

“Marathon Electrical Contractors has been in business since 1987 and is a full service electrical contracting company.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
24Exact matchWaco, TX, United StatesHQ recorded Nov 6, 20261,001-5,000339 contacts →

Exact match

“Residential and Commercial Services Since 1994, the professional electricians at Mr.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
25Exact matchLanham, VA, United StatesHQ recorded Nov 6, 20261,001-5,000331 contacts →

Exact match

“JE Richards LLC is a large union Commercial Electrical Contracting company.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase

Showing 25 of 6,002 electrical testing contractors based in the United States

See the full list, filter by size, metro and specialty, and access 23,009 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Electrical testing contractors based in the United States at a glance

As of Nov 6, 2026
31.3%Verified-email coverage
12.3Average contacts per company
1-10Median size (employees)
1.6%Largest-city concentration · Houston
Nov 6, 2026Page data refreshed

Companies by employee count

1-10
2,988
11-50
2,075
51-200
679
201-500
137
501-1,000
41
1,001-5,000
27
5,001-10,000
2
10001+
1

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 6,002 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

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
Company records associated with the United States whose business descriptions match “electrical testing contractors” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch
Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview
The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality
RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 23,009 professional contacts with verified work emails across the full matched dataset. 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 November 6, 2026. Lists refresh periodically as the graph is re-checked.
Record context
Company records and descriptions can change. Check the company's website for its current services and locations.

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “electrical testing contractors”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many electrical testing contractors are there based in the United States?

RevenueBase identified 6,002 company matches for electrical testing contractors associated with the United States as of November 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

IES Holdings tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most electrical testing contractors?

Houston leads with 94 company records, followed by New York (81) and Miami (39).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 23,009 professional contacts with verified work emails tracked across these 6,002 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on November 6, 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.