Company lists · Data refreshed September 2026

Top 25 Substation inspection services based in the United States

Name: Substation inspection 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 435 companies tracked

RevenueBase identified 435 substation inspection services headquartered in the United States as of September 2026 and tracks 12,944 professional contacts across them, including 4,889 with verified work emails. Houston is the largest hub.

This list covers substation inspection 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

435Companies

12,944Contacts tracked

4,889Verified emails

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The 25 largest substation inspection services based in the United States

Ranked by team size

Top 25 of 435 substation inspection 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 substation inspection 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	Shermco Industries	Indirect evidence	Irving, TX, United StatesHQ checked Sep 22, 2026	1,001-5,000	1,221 contacts →
	Indirect 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
2	Electric Power Systems	Indirect evidence	Maryland Heights, MO, United StatesHQ checked Sep 22, 2026	501-1,000	653 contacts →
	Indirect evidence “Electric Power Systems is an independent electrical testing & engineering organization.” Source: RevenueBase Database · checked Sep 22, 2026
3	M. J. Electric, LLC	Indirect evidence	Iron Mountain, MI, United StatesHQ checked Sep 22, 2026	1,001-5,000	621 contacts →
	Indirect evidence “M.” Source: RevenueBase Database · checked Sep 22, 2026
4	Doble Engineering	Indirect evidence	Marlborough, MA, United StatesHQ checked Sep 22, 2026	501-1,000	619 contacts →
	Indirect evidence “Doble is the world’s most trusted brand in electrical diagnostics.” Source: RevenueBase Database · checked Sep 22, 2026
5	PAR Electrical Contractors, LLC	Partial evidence	Kansas City, MO, United StatesHQ checked Sep 22, 2026	1,001-5,000	606 contacts →
	Partial evidence “PAR, a Quanta Services company, offers a full range of construction services for substations, overhead and underground distribution and transmission lines, engineering, design…” Source: RevenueBase Database · checked Sep 22, 2026
6	NEW River Electrical Corporation	Indirect evidence	Roanoke, VA, United StatesHQ checked Sep 22, 2026	1,001-5,000	342 contacts →
	Indirect evidence “New River Electrical Corporation (NRE) is one of the nation's leading employee-owned providers of electrical infrastructure construction and maintenance services, helping…” Source: RevenueBase Database · checked Sep 22, 2026
7	Great Southwestern Construction, INC	Indirect evidence	Castle Rock, United StatesHQ checked Sep 22, 2026	1,001-5,000	286 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 22, 2026
8	Asplundh Engineering Services	Indirect evidence	Willow Grove, PA, United StatesHQ checked Sep 22, 2026	1,001-5,000	284 contacts →
	Indirect evidence “Asplundh Engineering Services leverages more than 100 years of experience to provide a superior, single-point solution for engineering, design and testing services to…” Source: RevenueBase Database · checked Sep 22, 2026
9	Electrical Reliability Services, INC	Indirect evidence	Westerville, OH, United StatesHQ checked Sep 22, 2026	201-500	228 contacts →
	Indirect evidence “In business since 1971, Electrical Reliability Services, Inc.” Source: RevenueBase Database · checked Sep 22, 2026
10	BESCO	Indirect evidence	Knoxville, TN, United StatesHQ checked Sep 22, 2026	501-1,000	224 contacts →
	Indirect evidence “Since 1950, BESCO has met the electrical needs of our Knoxville, Tennessee community within the healthcare, industrial, commercial, higher education, federal, nuclear, low voltage…” Source: RevenueBase Database · checked Sep 22, 2026
11	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
12	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
13	Newkirk Electric Associates, INC	Indirect evidence	Muskegon, MI, United StatesHQ checked Sep 22, 2026	501-1,000	193 contacts →
	Indirect evidence “Newkirk Electric is a family-owned and operated, Michigan-based company headquartered on the shorelines of West Michigan.” Source: RevenueBase Database · checked Sep 22, 2026
14	Aubrey Silvey Enterprises, INC	Indirect evidence	Carrollton, GA, United StatesHQ checked Sep 22, 2026	201-500	192 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 22, 2026
15	EXO	Partial evidence	Magnolia, TX, United StatesHQ checked Sep 22, 2026	51-200	167 contacts →
	Partial evidence “We are an innovative supplier of infrastructure inspection, engineering, and field repair and reinforcement services for the global electrical utility, renewables, lighting, and…” Source: RevenueBase Database · checked Sep 22, 2026
16	Kent Power	Indirect evidence	Rockford, MI, United StatesHQ checked Sep 22, 2026	501-1,000	154 contacts →
	Indirect evidence “Kent Power believes in doing things the right way - the safe way, the first time around.” Source: RevenueBase Database · checked Sep 22, 2026
17	Hood Patterson & Dewar	Indirect evidence	Norcross, GA, United StatesHQ checked Sep 22, 2026	51-200	138 contacts →
	Indirect evidence “Hood Patterson & Dewar (HP & D) is a customer-driven, employee-owned collaborative team of engineers, technicians, and service professionals, offering: • Electrical and mechanical…” Source: RevenueBase Database · checked Sep 22, 2026
18	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
19	Substation Engineering Company	Partial evidence	Reading, PA, United StatesHQ checked Sep 22, 2026	51-200	132 contacts →
	Partial evidence “Substation Engineering Company (SECo), is a full service engineering and design firm with a dedicated team of experienced personnel providing a full range of cost effective…” Source: RevenueBase Database · checked Sep 22, 2026
20	International Line Builders INC	Indirect evidence	Tualatin, OR, United StatesHQ checked Sep 22, 2026	201-500	131 contacts →
	Indirect evidence “International Line Builders, Inc.” Source: RevenueBase Database · checked Sep 22, 2026
21	Volt Power, LLC	Indirect evidence	Atlanta, GA, United StatesHQ checked Sep 22, 2026	1,001-5,000	124 contacts →
	Indirect evidence “Volt Power is a top provider of overhead and underground utility services.” Source: RevenueBase Database · checked Sep 22, 2026
22	Mi-Tech Services, INC	Partial evidence	Brownsville, WI, United StatesHQ checked Sep 22, 2026	51-200	122 contacts →
	Partial evidence “Mi-Tech is a leading supplier of services to the utility industry including wood and steel utility pole inspection, remedial treatment and reinforcement, utility pole loading…” Source: RevenueBase Database · checked Sep 22, 2026
23	Mastec Power Delivery	Indirect evidence	Coral Gables, FL, United StatesHQ checked Sep 22, 2026	201-500	110 contacts →
	Indirect evidence “As one of the nation's leading electric transmission line construction companies, MasTec Power Delivery companies engineer and construct efficient and reliable electrical…” Source: RevenueBase Database · checked Sep 22, 2026
24	Power Line Services, INC	Indirect evidence	Fort Worth, TX, United StatesHQ checked Sep 22, 2026	201-500	106 contacts →
	Indirect evidence “Power Line Services is now part of Primoris Services Corporation.” Source: RevenueBase Database · checked Sep 22, 2026
25	Dynagrid	Indirect evidence	Lewisville, TX, United StatesHQ checked Sep 22, 2026	201-500	105 contacts →
	Indirect evidence “DynaGrid is a utility-focused construction company delivering the foundations and civil work that keep the grid running.” 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: substation inspection 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 substation inspection services.
Partial evidence: Its own public description names part of substation inspection services, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name substation inspection 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 435 substation inspection services based in the United States

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Substation inspection services based in the United States at a glance

As of Sep 22, 2026

37.8%Verified-email coverage

29.8Average contacts per company

11-50Median size (employees)

2.5%Largest-city concentration · Houston

Sep 22, 2026Page data refreshed

Companies by employee count

1-10

143

11-50

156

51-200

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 435 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 substation inspection 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 “substation inspection 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 substation inspection 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 substation inspection 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, 4,889 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.

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 substation inspection 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 substation inspection services are there based in the United States?

RevenueBase identified 435 substation inspection 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?

Shermco Industries, headquartered in Irving, tops this list with the largest team on record.

Which city has the most substation inspection services?

Houston leads with 11 headquartered companies, followed by Atlanta (8) and Orlando (7).

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 4,889 verified decision-maker contacts tracked across these 435 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.