Company lists · Data refreshed September 2026

Top 25 Electrical maintenance contractors based in the United States

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

Compiled by the RevenueBase Data Team Data refreshed Sep 16, 2026 7,453 companies tracked

RevenueBase identified 7,453 electrical maintenance contractors headquartered in the United States as of September 2026 and tracks 80,979 professional contacts across them, including 24,022 with verified work emails. Houston is the largest hub.

This list covers electrical maintenance contractors 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 16, 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 16, 2026 86% judged on-target in blind review

7,453Companies

80,979Contacts tracked

24,022Verified emails

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The 25 largest electrical maintenance contractors based in the United States

Ranked by team size

Top 25 of 7,453 electrical maintenance contractors based in the United States, ranked by team size, largest first. Data refreshed Sep 16, 2026. RevenueBase Smart Search rates how each company's information relates to electrical maintenance contractors: 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	IES Holdings	Partial evidence	Houston, TX, United StatesHQ checked Sep 16, 2026	5,001-10,000	2,567 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 16, 2026
2	Shermco Industries	Strong evidence	Irving, TX, United StatesHQ checked Sep 16, 2026	1,001-5,000	1,221 contacts →
	Strong 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 16, 2026
3	Elec-Tech Electrical Contractors	Indirect evidence	Long Beach, CA, United StatesHQ checked Sep 16, 2026	n/a	782 contacts →
	Indirect evidence “WELCOME TO OUR WEBSITE!” Source: RevenueBase Database · checked Sep 16, 2026
4	Prism Electric	Indirect evidence	Garland, TX, United StatesHQ checked Sep 16, 2026	1,001-5,000	687 contacts →
	Indirect evidence “Our story began in 1994 with a simple vision: Build a company that does things right.” Source: RevenueBase Database · checked Sep 16, 2026
5	Electric Power Systems	Partial evidence	Maryland Heights, MO, United StatesHQ checked Sep 16, 2026	501-1,000	653 contacts →
	Partial evidence “Electric Power Systems is an independent electrical testing & engineering organization.” Source: RevenueBase Database · checked Sep 16, 2026
6	Cache Valley Electric	Strong evidence	Logan, UT, United StatesHQ checked Sep 16, 2026	1,001-5,000	627 contacts →
	Strong evidence “As one of the nation’s premier electrical contractors, we don’t just provide high-quality services.” Source: RevenueBase Database · checked Sep 16, 2026
7	Alterman, INC	Partial evidence	Live Oak, TX, United StatesHQ checked Sep 16, 2026	501-1,000	597 contacts →
	Partial evidence “Since 1923, Alterman has provided electrical construction on many of San Antonio and Austin's most impressive landmarks and contemporary structures.” Source: RevenueBase Database · checked Sep 16, 2026
8	Colonialwebb	Indirect evidence	Richmond, VA, United StatesHQ checked Sep 16, 2026	1,001-5,000	571 contacts →
	Indirect evidence “ColonialWebb is built on a simple belief: when people feel like they belong and have a purpose, they can achieve almost anything.” Source: RevenueBase Database · checked Sep 16, 2026
9	CSI Electrical Contractors, INC	Partial evidence	Santa Fe Springs, CA, United StatesHQ checked Sep 16, 2026	1,001-5,000	560 contacts →
	Partial evidence “Founded in 1990, CSI has become a leader in highly technical and innovative electrical design and construction.” Source: RevenueBase Database · checked Sep 16, 2026
10	Hunt Electric	Strong evidence	Eagan, MN, United StatesHQ checked Sep 16, 2026	1,001-5,000	524 contacts →
	Strong evidence “Hunt Electric is a national electrical design, build, and maintenance firm based in Eagan, MN.” Source: RevenueBase Database · checked Sep 16, 2026
11	Pieper Electric, INC	Partial evidence	New Berlin, WI, United StatesHQ checked Sep 16, 2026	501-1,000	498 contacts →
	Partial evidence “At Pieper Electric, Inc,"Our People Are Our Power" isn't just a phrase; it's our way of life.” Source: RevenueBase Database · checked Sep 16, 2026
12	Inglett & Stubbs	Partial evidence	Mableton, GA, United StatesHQ checked Sep 16, 2026	501-1,000	459 contacts →
	Partial evidence “Inglett & Stubbs LLC is a recognized leader in the electrical construction industry today.” Source: RevenueBase Database · checked Sep 16, 2026
13	ACE Electric, INC	Strong evidence	Valdosta, GA, United StatesHQ checked Sep 16, 2026	1,001-5,000	455 contacts →
	Strong evidence “Ace Electric is a family-owned/operated electrical contractor performing safe and high-quality work for clients throughout the United States.” Source: RevenueBase Database · checked Sep 16, 2026
14	E-J Electric Installation CO	Partial evidence	Long Island City, NY, United StatesHQ checked Sep 16, 2026	1,001-5,000	444 contacts →
	Partial evidence “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…” Source: RevenueBase Database · checked Sep 16, 2026
15	Cochran	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 16, 2026	501-1,000	434 contacts →
	Indirect evidence “For more than 70 years Cochran has been powering the Pacific Northwest.” Source: RevenueBase Database · checked Sep 16, 2026
16	Guarantee Electrical Company	Strong evidence	Saint Louis, MO, United StatesHQ checked Sep 16, 2026	501-1,000	419 contacts →
	Strong evidence “A full-service electrical contractor since 1902, providing capability, performance, and legendary innovation in new construction, design-build, low-voltage systems, energy…” Source: RevenueBase Database · checked Sep 16, 2026
17	Commonwealth Electric Company Of The Midwest	Strong evidence	Lincoln, NE, United StatesHQ checked Sep 16, 2026	1,001-5,000	392 contacts →
	Strong evidence “Commonwealth Electric of the Midwest is a full service electrical and communications contractor, with an established position in Arizona, Iowa, Nebraska, and Utah markets.” Source: RevenueBase Database · checked Sep 16, 2026
18	Strada Services	Partial evidence	Sanford, FL, United StatesHQ checked Sep 16, 2026	1,001-5,000	391 contacts →
	Partial evidence “Strada Services is a full service electrical, security, and air conditioning contracting company servicing residential, commercial, and industrial customers in Florida and in the…” Source: RevenueBase Database · checked Sep 16, 2026
19	DP Electric INC	Partial evidence	Tempe, AZ, United StatesHQ checked Sep 16, 2026	1,001-5,000	377 contacts →
	Partial evidence “DP Electric (DPE) has a long history as a dedicated trade partner.” Source: RevenueBase Database · checked Sep 16, 2026
20	Hunt Electric, LLC	Strong evidence	Salt Lake City, UT, United StatesHQ checked Sep 16, 2026	501-1,000	352 contacts →
	Strong evidence “Hunt Electric is an industry-leading electrical contractor serving commercial, industrial, mission critical, mining, infrastructure, and numerous other sectors.” Source: RevenueBase Database · checked Sep 16, 2026
21	Marathon Electrical Contractors	Strong evidence	Irondale, AL, United StatesHQ checked Sep 16, 2026	501-1,000	337 contacts →
	Strong evidence “Marathon Electrical Contractors has been in business since 1987 and is a full service electrical contracting company.” Source: RevenueBase Database · checked Sep 16, 2026
22	BIG State Electric, LTD	Partial evidence	San Antonio, TX, United StatesHQ checked Sep 16, 2026	1,001-5,000	320 contacts →
	Partial evidence “Since our founding in 1966, Big State Electric Ltd.” Source: RevenueBase Database · checked Sep 16, 2026
23	Mr. Electric	Partial evidence	Waco, TX, United StatesHQ checked Sep 16, 2026	1,001-5,000	308 contacts →
	Partial evidence “Residential and Commercial Services Since 1994, the professional electricians at Mr.” Source: RevenueBase Database · checked Sep 16, 2026
24	Ermco, INC	Strong evidence	Greenwood, IN, United StatesHQ checked Sep 16, 2026	201-500	304 contacts →
	Strong evidence “From our beginning in 1962 as a small electrical maintenance company in downtown Indianapolis with a staff of three, ERMCO, Inc.” Source: RevenueBase Database · checked Sep 16, 2026
25	Watson Electrical Construction Co. LLC	Strong evidence	Wilson, NC, United StatesHQ checked Sep 16, 2026	201-500	295 contacts →
	Strong evidence “Since 1935, Watson Electrical Construction Co, LLC has been leading the Southeast in electrical construction and maintenance by offering comprehensive, world-class services across…” Source: RevenueBase Database · checked Sep 16, 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: electrical maintenance contractors. 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 electrical maintenance contractors.
Partial evidence: Its own public description names part of electrical maintenance contractors, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name electrical maintenance contractors. 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 7,453 electrical maintenance contractors based in the United States

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Electrical maintenance contractors based in the United States at a glance

As of Sep 16, 2026

29.7%Verified-email coverage

10.9Average contacts per company

11-50Median size (employees)

1.6%Largest-city concentration · Houston

Sep 16, 2026Page data refreshed

Companies by employee count

1-10

3,594

11-50

2,647

51-200

901

201-500

163

501-1,000

1,001-5,000

5,001-10,000

10001+

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 7,453 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 maintenance contractors, 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 “electrical maintenance contractors”. 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 maintenance contractors), 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 maintenance contractors, 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, 24,022 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 16, 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 maintenance contractors by metro

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 maintenance contractors, 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 maintenance contractors are there based in the United States?

RevenueBase identified 7,453 electrical maintenance contractors 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?

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

Which city has the most electrical maintenance contractors?

Houston leads with 117 headquartered companies, followed by New York (87) and Denver (50).

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 24,022 verified decision-maker contacts tracked across these 7,453 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 16, 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.