Company lists · Data refreshed November 2026

Top 25 Industrial electrical testing companies based in the United States

Name: Industrial electrical testing companies based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Nov 6, 2026 1,795 companies tracked

RevenueBase identified 1,795 company matches for industrial electrical testing companies associated with the United States as of November 2026 and tracks 23,475 professional contacts across them, including 8,005 with verified work emails. Houston is the largest hub.

This list covers company matches for industrial electrical testing companies 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

1,795Companies

23,475Contacts tracked

8,005Verified emails

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The 25 largest industrial electrical testing companies based in the United States

Ranked by team size

Top 25 of 1,795 company matches for industrial electrical testing companies 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.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Shermco Industries	Exact match	Irving, OK, United StatesHQ recorded Nov 6, 2026	1,001-5,000	1,324 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
2	Applied Technical Services, LLC	Exact match	Marietta, GA, United StatesHQ recorded Nov 6, 2026	1,001-5,000	961 contacts →
	Exact match “Applied Technical Services assists commercial and industrial clients by providing inspection, testing, consulting engineering, and calibration services.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3	Electric Power Systems	Exact match	Maryland Heights, MI, United StatesHQ recorded Nov 6, 2026	501-1,000	678 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
4	Doble Engineering	Exact match	Marlborough, MA, United StatesHQ recorded Nov 6, 2026	501-1,000	662 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
5	Resa Power	Exact match	Houston, CA, United StatesHQ recorded Nov 6, 2026	1,001-5,000	590 contacts →
	Exact match “RESA Power is your ONE-STOP for all of your power needs.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6	FST Technical Services	Exact match	Chandler, PA, United StatesHQ recorded Nov 6, 2026	201-500	375 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
7	Versa Integrity Group, INC	Exact match	Tomball, TX, United StatesHQ recorded Nov 6, 2026	5,001-10,000	366 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8	Electrical Reliability Services, INC	Exact match	Westerville, SC, United StatesHQ recorded Nov 6, 2026	201-500	270 contacts →
	Exact match “In business since 1971, Electrical Reliability Services, Inc.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9	Sdmyers	Exact match	Tallmadge, OH, United StatesHQ recorded Nov 6, 2026	201-500	219 contacts →
	Exact match “SDMyers is the industry leader in transformer and substation maintenance and electric power system reliability.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10	Hilscher-Clarke Electric Company	Exact match	Canton, OH, United StatesHQ recorded Nov 6, 2026	201-500	203 contacts →
	Exact match “Hilscher-Clarke Electric Company is a full service electrical contractor, with more than 100 years experience in the commercial, industrial, and residential markets.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11	F.D. Hayes Electric	Exact match	Lansing, United StatesHQ recorded Nov 6, 2026	51-200	194 contacts →
	Exact match “Electrical; Fire Alarm; Kitchen equipment; low voltage network, voice and fiber optic cabling; AV; Sound and Security services for residential, commercial and industrial customers.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12	Quality Electrical Systems	Exact match	West Jordan, UT, United StatesHQ recorded Nov 6, 2026	501-1,000	190 contacts →
	Exact match “We’re an innovative company with countless years of combined experience in the industrial electrical industry.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13	GMR	Exact match	Heath, TX, United StatesHQ recorded Nov 6, 2026	51-200	187 contacts →
	Exact match “GMR has become known as the "Industry Best Practice" for helping facilities document existing conditions, prepare for improvements, and minimize risk.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14	Techcorr Usa, LLC	Exact match	Pasadena, TX, United StatesHQ recorded Nov 6, 2026	501-1,000	179 contacts →
	Exact match “The TechCorr name is synonymous with safe, quality inspection services.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15	Kenmor Electric Company	Exact match	Houston, TX, United StatesHQ recorded Nov 6, 2026	201-500	166 contacts →
	Exact match “KenMor Electric is recognized for its service and craftsmanship.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16	Solomon Corporation	Exact match	Solomon, TN, United StatesHQ recorded Nov 6, 2026	501-1,000	165 contacts →
	Exact match “Solomon Corporation buys, sells, repairs, recycles, and disposes of transformers, regulators and reclosers.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17	Qualspec	Exact match	Deer Park, TX, United StatesHQ recorded Nov 6, 2026	1,001-5,000	164 contacts →
	Exact match “QualSpec is a leading industrial inspection firm headquartered in Houston, Texas.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18	Verispex	Exact match	Houston, TX, United StatesHQ recorded Nov 6, 2026	201-500	164 contacts →
	Exact match “About Us Cutting-edge technologies.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19	Southwest Electric CO	Exact match	Oklahoma City, TN, United StatesHQ recorded Nov 6, 2026	201-500	158 contacts →
	Exact match “In 2025, Southwest Electric Co.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20	Trialon Corporation	Exact match	Burton, IN, United StatesHQ recorded Nov 6, 2026	501-1,000	156 contacts →
	Exact match “Trialon is now Element!” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21	Hood Patterson & Dewar	Exact match	Norcross, GA, United StatesHQ recorded Nov 6, 2026	51-200	150 contacts →
	Exact match “Hood Patterson & Dewar (HP & D) is a customer-driven, employee-owned collaborative team of engineers, technicians, and service professionals, offering: • Electrical and mechanical…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22	J.W. Didado Electric	Exact match	Akron, NJ, United StatesHQ recorded Nov 6, 2026	501-1,000	148 contacts →
	Exact match “J.W.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23	Electric Motor & Contracting Co., INC	Exact match	Chesapeake, VA, United StatesHQ recorded Nov 6, 2026	201-500	141 contacts →
	Exact match “Established in 1960, Electric Motor and Contracting remains one of the largest independently owned electric motor and pump repair shops in the U.S.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
24	White Electrical Construction Company	Exact match	Atlanta, GA, United StatesHQ recorded Nov 6, 2026	201-500	137 contacts →
	Exact match “White Electrical is a full service industrial electrical contractor supplying many different industries including: automotive, food/beverage, power, chemical, pulp/paper…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
25	Dit-Mco International	Exact match	Kansas City, MO, United StatesHQ recorded Nov 6, 2026	51-200	108 contacts →
	Exact match “DIT-MCO International's proven automated product testing solutions for wired assemblies provide reliable service to industrial, commercial, and military customers.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “industrial electrical testing companies”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 1,795 industrial electrical testing companies based in the United States

See the full list, filter by size, metro and specialty, and access 8,005 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Industrial electrical testing companies based in the United States at a glance

As of Nov 6, 2026

34.1%Verified-email coverage

13.1Average contacts per company

11-50Median size (employees)

1.8%Largest-city concentration · Houston

Nov 6, 2026Page data refreshed

Companies by employee count

1-10

868

11-50

653

51-200

193

201-500

501-1,000

1,001-5,000

5,001-10,000

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 1,795 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 “industrial electrical testing companies” 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 8,005 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.

Industrial electrical testing companies by metro

Industrial electrical testing companies in Houston32

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 “industrial electrical testing companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

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

RevenueBase identified 1,795 company matches for industrial electrical testing companies 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?

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

Which city has the most industrial electrical testing companies?

Houston leads with 32 company records, followed by Charlotte (17) and New York (15).

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 8,005 professional contacts with verified work emails tracked across these 1,795 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.