Company lists · Data refreshed September 2026

Top 25 Switchgear maintenance services based in the United States

Name: Switchgear maintenance services based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 22, 2026 680 companies tracked

RevenueBase identified 680 switchgear maintenance services headquartered in the United States as of September 2026 and tracks 14,005 professional contacts across them, including 5,021 with verified work emails. Houston is the largest hub.

This list covers switchgear maintenance services headquartered in the 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 22, 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 22, 2026 86% judged on-target in blind review

680Companies

14,005Contacts tracked

5,021Verified emails

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The 25 largest switchgear maintenance services based in the United States

Ranked by team size

Top 25 of 680 switchgear maintenance services based in the United States, ranked by team size, largest first. Data refreshed Sep 22, 2026. RevenueBase Smart Search rates how each company's information relates to switchgear maintenance services: 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	Powell	Indirect evidence	Houston, TX, United StatesHQ checked Sep 22, 2026	1,001-5,000	2,561 contacts →
	Indirect evidence “Powell is hiring- Powell is dedicated to improving people’s lives by providing reliable power distribution systems in every market we serve.” Source: RevenueBase Database · checked Sep 22, 2026
2	Shermco Industries	Partial evidence	Irving, TX, United StatesHQ checked Sep 22, 2026	1,001-5,000	1,221 contacts →
	Partial evidence “Shermco Industries is a provider of safe, reliable testing, repair, professional training, electrical outage planning, maintenance and analysis of rotating apparatus and…” Source: RevenueBase Database · checked Sep 22, 2026
3	Mitsubishi Electric Power Products, INC	Indirect evidence	Warrendale, PA, United StatesHQ checked Sep 22, 2026	1,001-5,000	967 contacts →
	Indirect evidence “Mitsubishi Electric Power Products, Inc.(MEPPI) is a leading U.S.” Source: RevenueBase Database · checked Sep 22, 2026
4	Resa Power	Indirect evidence	Houston, TX, United StatesHQ checked Sep 22, 2026	1,001-5,000	511 contacts →
	Indirect evidence “RESA Power is your ONE-STOP for all of your power needs.” Source: RevenueBase Database · checked Sep 22, 2026
5	RMS Energy Co, LLC	Partial evidence	Little Falls, MN, United StatesHQ checked Sep 22, 2026	501-1,000	288 contacts →
	Partial evidence “RMS Energy leads the industry by energizing the future through reliable power solutions, offering comprehensive installation and maintenance services on 480V to 765kV electrical…” Source: RevenueBase Database · checked Sep 22, 2026
6	Hilscher-Clarke Electric Company	Indirect evidence	Canton, OH, United StatesHQ checked Sep 22, 2026	201-500	196 contacts →
	Indirect evidence “Hilscher-Clarke Electric Company is a full service electrical contractor, with more than 100 years experience in the commercial, industrial, and residential markets.” Source: RevenueBase Database · checked Sep 22, 2026
7	Sdmyers	Partial evidence	Tallmadge, OH, United StatesHQ checked Sep 22, 2026	201-500	195 contacts →
	Partial evidence “SDMyers is the industry leader in transformer and substation maintenance and electric power system reliability.” Source: RevenueBase Database · checked Sep 22, 2026
8	Expanse Electrical CO	Indirect evidence	Houston, TX, United StatesHQ checked Sep 22, 2026	501-1,000	188 contacts →
	Indirect evidence “Expanse Electrical Company is a premier provider of integrated electrical infrastructure, instrumentation and automation system solutions.” Source: RevenueBase Database · checked Sep 22, 2026
9	Solomon Corporation	Indirect evidence	Solomon, KS, United StatesHQ checked Sep 22, 2026	501-1,000	157 contacts →
	Indirect evidence “Solomon Corporation buys, sells, repairs, recycles, and disposes of transformers, regulators and reclosers.” Source: RevenueBase Database · checked Sep 22, 2026
10	Southwest Electric CO	Indirect evidence	Oklahoma City, OK, United StatesHQ checked Sep 22, 2026	201-500	145 contacts →
	Indirect evidence “In 2025, Southwest Electric Co.” Source: RevenueBase Database · checked Sep 22, 2026
11	Emerald Transformer	Indirect evidence	Mckinney, TX, United StatesHQ checked Sep 22, 2026	201-500	138 contacts →
	Indirect evidence “Emerald Transformer is the premier national single-source solution for oil-filled electrical equipment with services including repair, re-manufacturing, field technical services…” Source: RevenueBase Database · checked Sep 22, 2026
12	Electric Motor & Contracting Co., INC	Indirect evidence	Chesapeake, VA, United StatesHQ checked Sep 22, 2026	201-500	131 contacts →
	Indirect evidence “Established in 1960, Electric Motor and Contracting remains one of the largest independently owned electric motor and pump repair shops in the U.S.” Source: RevenueBase Database · checked Sep 22, 2026
13	Myers Power Products, INC	Indirect evidence	North Canton, OH, United StatesHQ checked Sep 22, 2026	1,001-5,000	124 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 22, 2026
14	Horner Industrial Group	Indirect evidence	Indianapolis, IN, United StatesHQ checked Sep 22, 2026	201-500	102 contacts →
	Indirect evidence “For over half a century, Horner Industrial Group has been helping to power your business with industry leading service, quality and value by providing excellence in electrical…” Source: RevenueBase Database · checked Sep 22, 2026
15	ESS Metron	Partial evidence	Denver, CO, United StatesHQ checked Sep 22, 2026	201-500	96 contacts →
	Partial evidence “With over 60 years of experience, ESS Metron has manufactured the highest quality electrical switchgear solutions for the most demanding applications and environments known.” Source: RevenueBase Database · checked Sep 22, 2026
16	Allan Briteway Electrical Utility Contractors, INC	Indirect evidence	Florham Park, NJ, United StatesHQ checked Sep 22, 2026	51-200	94 contacts →
	Indirect evidence “With over 85 years of experience in the electrical contracting industry, Allan Briteway Electrical Utility Contractors, Inc.” Source: RevenueBase Database · checked Sep 22, 2026
17	Technical Diagnostic Services	Indirect evidence	Fort Worth, TX, United StatesHQ checked Sep 22, 2026	201-500	91 contacts →
	Indirect evidence “For over 25 years, Sentinel-TDS, based in Dallas/Ft.” Source: RevenueBase Database · checked Sep 22, 2026
18	Electrical Engineering & Service Co., INC	Partial evidence	Holbrook, MA, United StatesHQ checked Sep 22, 2026	n/a	91 contacts →
	Partial evidence “Specialists in Electrical Power Systems - Testing, Commissioning, Maintenance.” Source: RevenueBase Database · checked Sep 22, 2026
19	Fortune Electric	Partial evidence	Torrance, CA, United StatesHQ checked Sep 22, 2026	1,001-5,000	83 contacts →
	Partial evidence “Welcome to Fortune Electric, a world class power transformer and switchgear manufacturer since 1969.” Source: RevenueBase Database · checked Sep 22, 2026
20	LND Technical Services, LLC	Partial evidence	Houston, TX, United StatesHQ checked Sep 22, 2026	51-200	81 contacts →
	Partial evidence “We are a Women and Minority-Owned Small Business who specializes in Engineering Services, Testing, Commissioning, and Maintenance for Low, Medium, and High Voltage Electrical…” Source: RevenueBase Database · checked Sep 22, 2026
21	Praetorian Power Protection LLC	Partial evidence	Seattle, OR, United StatesHQ checked Sep 22, 2026	51-200	71 contacts →
	Partial evidence “Vision: To be the Global Power Protection Expert Mission: Deliver exceptional testing, maintenance, engineering, and commissioning services with uncompromising quality, safety…” Source: RevenueBase Database · checked Sep 22, 2026
22	Kiemle-Hankins	Indirect evidence	Perrysburg, OH, United StatesHQ checked Sep 22, 2026	51-200	68 contacts →
	Indirect evidence “Kiemle-Hankins is a leading industrial service and repair company.” Source: RevenueBase Database · checked Sep 22, 2026
23	Group CBS	Indirect evidence	Denton, TX, United StatesHQ checked Sep 22, 2026	201-500	66 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 22, 2026
24	Magnetech Industrial Services, INC	Indirect evidence	Massillon, OH, United StatesHQ checked Sep 22, 2026	201-500	66 contacts →
	Indirect evidence “Magnetech is an ISO-quality provider of electrical-mechanical industrial services, including testing, repair, rewind and refurbishment of ac/dc motors and generators…” Source: RevenueBase Database · checked Sep 22, 2026
25	Southern Power Systems	Partial evidence	Baton Rouge, LA, United StatesHQ checked Sep 22, 2026	51-200	63 contacts →
	Partial evidence “We service, maintain, repair, and upgrade all manufacturers' electrical equipment, including switchgear, circuit breakers, transformers, and starters.” Source: RevenueBase Database · checked Sep 22, 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: switchgear maintenance services. 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 switchgear maintenance services.
Partial evidence: Its own public description names part of switchgear maintenance services, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name switchgear maintenance services. 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 680 switchgear maintenance services based in the United States

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Switchgear maintenance services based in the United States at a glance

As of Sep 22, 2026

35.9%Verified-email coverage

20.6Average contacts per company

11-50Median size (employees)

3.8%Largest-city concentration · Houston

Sep 22, 2026Page data refreshed

Companies by employee count

1-10

270

11-50

267

51-200

105

201-500

501-1,000

1,001-5,000

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 680 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 switchgear maintenance services, 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 the United States whose own description of what they do matches “switchgear maintenance services”. 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 switchgear maintenance services), 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 switchgear maintenance services, and records with no verified work email. Companies headquartered outside United States 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, 5,021 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 22, 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.

Switchgear maintenance services by metro

Switchgear maintenance services in Houston26

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 switchgear maintenance services, 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 switchgear maintenance services are there based in the United States?

RevenueBase identified 680 switchgear maintenance services headquartered in the 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?

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

Which city has the most switchgear maintenance services?

Houston leads with 26 headquartered companies, followed by Charlotte (8) and Ontario (6).

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 5,021 verified decision-maker contacts tracked across these 680 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 22, 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.