Company lists · Data refreshed November 2026

Top 25 Electrical testing and commissioning services based in the United States

RevenueBase identified 718 company matches for electrical testing and commissioning services associated with the United States as of November 2026 and tracks 12,333 professional contacts across them, including 4,454 with verified work emails. Houston is the largest hub.

This list covers company matches for electrical testing and commissioning services 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
718Companies
12,333Contacts tracked
4,454Verified emails
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The 25 largest electrical testing and commissioning services based in the United States

Ranked by team size
Top 25 of 718 company matches for electrical testing and commissioning services 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 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
2Exact 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
3Exact 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
4Exact matchItasca, IL, United StatesHQ recorded Nov 6, 2026501-1,000290 contacts →

Exact match

“Electrical and communication services including design, installation, testing, long-term service, and maintenance.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5Exact matchWesterville, SC, United StatesHQ recorded Nov 6, 2026201-500270 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
6Exact matchTallmadge, OH, United StatesHQ recorded Nov 6, 2026201-500219 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
7Exact matchCanton, OH, United StatesHQ recorded Nov 6, 2026201-500203 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
8Exact matchBillings, MT, United StatesHQ recorded Nov 6, 2026201-500200 contacts →

Exact match

“EPC Services Company (EPCS) has grown into one of the largest Engineer-Procure-Construct firms in the U.S, delivering comprehensive EPC execution, electrical testing, and…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9Exact matchKennesaw, NJ, United StatesHQ recorded Nov 6, 202651-200176 contacts →

Exact match

“Rubicon Technical Services (RTS) offers innovative solutions for commissioning, testing, optimizing, operating, and maintaining critical facilities that depend on electrical…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10Exact matchHouston, TX, United StatesHQ recorded Nov 6, 2026201-500166 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
11Exact matchNorcross, GA, United StatesHQ recorded Nov 6, 202651-200150 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
12Exact matchAtlanta, GA, United StatesHQ recorded Nov 6, 2026201-500137 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
13Exact matchNorcross, TN, United StatesHQ recorded Nov 6, 202651-200122 contacts →

Exact match

“Patterson & Dewar Engineers, Inc.(P&D) delivers best-in-class electrical and civil engineering and construction management services.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14Exact matchFort Worth, TX, United StatesHQ recorded Nov 6, 2026201-500106 contacts →

Exact match

“For over 25 years, Sentinel-TDS, based in Dallas/Ft.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15Exact matchLenexa, KS, United StatesHQ recorded Nov 6, 202611-50100 contacts →

Exact match

“Henderson Building Solutions is a general contractor and commissioning services firm that provides a seamless bridge between design, construction, and ongoing maintenance.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16Exact matchSavage, MN, United StatesHQ recorded Nov 6, 202651-20099 contacts →

Exact match

“Master Electric is a full service electrical contractor servicing the upper mid-west since 1973, providing commercial/industrial, multi-family, communication/data/fire/safety with…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17Exact matchHolbrook, MA, United StatesHQ recorded Nov 6, 2026n/a95 contacts →

Exact match

“Specialists in Electrical Power Systems - Testing, Commissioning, Maintenance.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18Exact matchAtlanta, GA, United StatesHQ recorded Nov 6, 202651-20093 contacts →

Exact match

“At Apollo, we help our clients commission mission-critical assets that power tomorrow’s economy.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19Exact matchHouston, TX, United StatesHQ recorded Nov 6, 2026201-50088 contacts →

Exact match

“Supporting Global Energy and Infrastructure Projects, C2O Group provides electrical, communications and mechanical services.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20Exact matchLouisville, KY, United StatesHQ recorded Nov 6, 2026201-50086 contacts →

Exact match

“For over 60 years, Arrow Electric has been a valued business partner offering comprehensive electrical services to the industrial and commercial sectors.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21Exact matchEdwardsville, IL, United StatesHQ recorded Nov 6, 2026501-1,00085 contacts →

Exact match

“J.F.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22Exact matchSeattle, OR, United StatesHQ recorded Nov 6, 202651-20074 contacts →

Exact match

“Vision: To be the Global Power Protection Expert Mission: Deliver exceptional testing, maintenance, engineering, and commissioning services with uncompromising quality, safety…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23Exact matchHouston, TX, United StatesHQ recorded Nov 6, 202651-20066 contacts →

Exact match

“Zadok Technologies – Providing Engineering And Field Services To The World Quality Companies provides engineering and field services to the world.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
24Exact matchBaton Rouge, LA, United StatesHQ recorded Nov 6, 202651-20065 contacts →

Exact match

“We service, maintain, repair, and upgrade all manufacturers' electrical equipment, including switchgear, circuit breakers, transformers, and starters.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
25Exact matchConverse, TX, United StatesHQ recorded Nov 6, 202651-20064 contacts →

Exact match

“WELCOME Power Engineering Services is an Accredited, Full-Member of the International Electrical Testing Association (NETA), and a Registered Engineering Firm in 46 states.”

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

Showing 25 of 718 electrical testing and commissioning services based in the United States

See the full list, filter by size, metro and specialty, and access 4,454 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Electrical testing and commissioning services based in the United States at a glance

As of Nov 6, 2026
36.1%Verified-email coverage
17.2Average contacts per company
11-50Median size (employees)
2.1%Largest-city concentration · Houston
Nov 6, 2026Page data refreshed

Companies by employee count

1-10
330
11-50
247
51-200
100
201-500
27
501-1,000
5
1,001-5,000
2

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 718 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 and commissioning services” 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 4,454 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 and commissioning services”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many electrical testing and commissioning services are there based in the United States?

RevenueBase identified 718 company matches for electrical testing and commissioning services 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 electrical testing and commissioning services?

Houston leads with 15 company records, followed by New York (10) and Atlanta (9).

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 4,454 professional contacts with verified work emails tracked across these 718 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.