Company lists · Data refreshed September 2026

Top 25 Power equipment diagnostics providers based in the United States

RevenueBase identified 721 power equipment diagnostics providers headquartered in the United States as of September 2026 and tracks 17,935 professional contacts across them, including 7,038 with verified work emails. Houston is the largest hub.

This list covers power equipment diagnostics providers 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 20, 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 20, 2026 86% judged on-target in blind review
721Companies
17,935Contacts tracked
7,038Verified emails
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The 25 largest power equipment diagnostics providers based in the United States

Ranked by team size
Top 25 of 721 power equipment diagnostics providers based in the United States, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to power equipment diagnostics providers: 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.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1Partial evidenceMelrose Park, IL, United StatesHQ checked Sep 20, 2026201-5001,463 contacts →

Partial evidence

“We are a full service turnkey provider for the power generation industry and those industries generating their own power as a means to an end.”

Source: RevenueBase Database · checked Sep 20, 2026
2Indirect evidenceIrving, TX, United StatesHQ checked Sep 20, 20261,001-5,0001,221 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 20, 2026
3Partial evidenceGreenville, SC, United StatesHQ checked Sep 20, 20261,001-5,0001,064 contacts →

Partial evidence

“Headquartered in Greenville, South Carolina, Integrated Power Services (IPS) operates one of the leading independent aftermarket service networks focused on the critical repair…”

Source: RevenueBase Database · checked Sep 20, 2026
4Partial evidenceMaryland Heights, MO, United StatesHQ checked Sep 20, 2026501-1,000653 contacts →

Partial evidence

“Electric Power Systems is an independent electrical testing & engineering organization.”

Source: RevenueBase Database · checked Sep 20, 2026
5Partial evidenceMarlborough, MA, United StatesHQ checked Sep 20, 2026501-1,000619 contacts →

Partial evidence

“Doble is the world’s most trusted brand in electrical diagnostics.”

Source: RevenueBase Database · checked Sep 20, 2026
6Partial evidenceHouston, TX, United StatesHQ checked Sep 20, 20261,001-5,000511 contacts →

Partial evidence

“RESA Power is your ONE-STOP for all of your power needs.”

Source: RevenueBase Database · checked Sep 20, 2026
7Partial evidenceFairport, NY, United StatesHQ checked Sep 20, 2026501-1,000494 contacts →

Partial evidence

“Qualitrol is a global leader in electrical grid monitoring solutions for businesses that manage, operate, or support the power grid.”

Source: RevenueBase Database · checked Sep 20, 2026
8Partial evidenceCarrollton, TX, United StatesHQ checked Sep 20, 20261,001-5,000426 contacts →

Partial evidence

“Concentric is the first national industrial power services organization delivering forklift and critical power as well as maintenance solutions that ensure uninterrupted…”

Source: RevenueBase Database · checked Sep 20, 2026
9Partial evidenceLatham, NY, United StatesHQ checked Sep 20, 2026501-1,000379 contacts →

Partial evidence

“Mechanical Dynamics & Analysis (MD & A) provides power generation companies around the globe with a full-service OEM alternative for services, parts, and repairs.”

Source: RevenueBase Database · checked Sep 20, 2026
10Partial evidencePlano, TX, United StatesHQ checked Sep 20, 2026501-1,000313 contacts →

Partial evidence

“Headquartered in Plano, Texas, asTech® focuses on providing OEM diagnostics to collision repair shops nationwide.”

Source: RevenueBase Database · checked Sep 20, 2026
11Indirect evidenceGreenville, SC, United StatesHQ checked Sep 20, 2026501-1,000305 contacts →

Indirect evidence

“Excellence in creating innovative solutions for the supply, control and use of energy.”

Source: RevenueBase Database · checked Sep 20, 2026
12Partial evidenceLiberty, MO, United StatesHQ checked Sep 20, 2026501-1,000299 contacts →

Partial evidence

“For over 70 years, Central Power Systems & Services has been the trusted partner for the region’s most demanding industries, from construction and mining to trucking, power…”

Source: RevenueBase Database · checked Sep 20, 2026
13Indirect evidenceIrmo, SC, United StatesHQ checked Sep 20, 202651-200258 contacts →

Indirect evidence

“Diesel Laptops provides commercial truck efficiency solutions for truck repair facilities.”

Source: RevenueBase Database · checked Sep 20, 2026
14Indirect evidenceWesterville, OH, United StatesHQ checked Sep 20, 2026201-500228 contacts →

Indirect evidence

“In business since 1971, Electrical Reliability Services, Inc.”

Source: RevenueBase Database · checked Sep 20, 2026
15Indirect evidenceIndianapolis, United StatesHQ checked Sep 20, 2026201-500199 contacts →

Indirect evidence

“POLARIS Laboratories® can help you prevent maintenance failure.”

Source: RevenueBase Database · checked Sep 20, 2026
16Partial evidenceNew York, NY, United StatesHQ checked Sep 20, 2026201-500198 contacts →

Partial evidence

“GenServe supports critical infrastructure by delivering expert, OEM-agnostic power services across all generator systems and brands.”

Source: RevenueBase Database · checked Sep 20, 2026
17Partial evidenceTallmadge, OH, United StatesHQ checked Sep 20, 2026201-500195 contacts →

Partial evidence

“SDMyers is the industry leader in transformer and substation maintenance and electric power system reliability.”

Source: RevenueBase Database · checked Sep 20, 2026
18Indirect evidenceSolomon, KS, United StatesHQ checked Sep 20, 2026501-1,000157 contacts →

Indirect evidence

“Solomon Corporation buys, sells, repairs, recycles, and disposes of transformers, regulators and reclosers.”

Source: RevenueBase Database · checked Sep 20, 2026
19Strong evidenceIrvine, CA, United StatesHQ checked Sep 20, 202651-200153 contacts →

Strong evidence

“THE AUTOMOTIVE AFTERMARKET INDUSTRY LEADER Innova Electronics Corporation is a leading supplier of test equipment and diagnostic reporting for the automotive aftermarket, offering…”

Source: RevenueBase Database · checked Sep 20, 2026
20Indirect evidenceOklahoma City, OK, United StatesHQ checked Sep 20, 2026201-500145 contacts →

Indirect evidence

“In 2025, Southwest Electric Co.”

Source: RevenueBase Database · checked Sep 20, 2026
21Partial evidenceHouston, TX, United StatesHQ checked Sep 20, 202651-200143 contacts →

Partial evidence

“APG is a growing independent provider of critical components and services to its customers in the power generation, refining, pipeline, and general industrial sectors.”

Source: RevenueBase Database · checked Sep 20, 2026
22Indirect evidenceHarrison, OH, United StatesHQ checked Sep 20, 2026n/a141 contacts →

Indirect evidence

“As of December 31, 2025, Altaquip has officially concluded operations.”

Source: RevenueBase Database · checked Sep 20, 2026
23Partial evidenceMckinney, TX, United StatesHQ checked Sep 20, 2026201-500138 contacts →

Partial 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 20, 2026
24Indirect evidenceChesapeake, VA, United StatesHQ checked Sep 20, 2026201-500131 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 20, 2026
25Partial evidenceWoburn, MA, United StatesHQ checked Sep 20, 202651-200130 contacts →

Partial evidence

“IN POWER FOR 60 YEARS Kraft Power was founded in 1965 in Boston, Massachusetts.”

Source: RevenueBase Database · checked Sep 20, 2026

Showing 25 of 721 power equipment diagnostics providers based in the United States

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Power equipment diagnostics providers based in the United States at a glance

As of Sep 20, 2026
39.2%Verified-email coverage
24.9Average contacts per company
11-50Median size (employees)
2.6%Largest-city concentration · Houston
Sep 20, 2026Page data refreshed

Companies by employee count

1-10
304
11-50
254
51-200
110
201-500
31
501-1,000
13
1,001-5,000
5
5,001-10,000
1

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 721 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 power equipment diagnostics providers, 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 “power equipment diagnostics providers”. 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 power equipment diagnostics providers), 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 power equipment diagnostics providers, 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, 7,038 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 20, 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 power equipment diagnostics providers, 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 power equipment diagnostics providers are there based in the United States?

RevenueBase identified 721 power equipment diagnostics providers 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?

Power Plant Services, headquartered in Melrose Park, tops this list with the largest team on record.

Which city has the most power equipment diagnostics providers?

Houston leads with 19 headquartered companies, followed by Miami (9) and Dallas (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 7,038 verified decision-maker contacts tracked across these 721 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 20, 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.