Company lists · Data refreshed September 2026

Top 25 Power plant maintenance contractors based in the United States

Name: Power plant 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 17, 2026 396 companies tracked

RevenueBase identified 396 power plant maintenance contractors headquartered in the United States as of September 2026 and tracks 16,280 professional contacts across them, including 5,523 with verified work emails. Houston is the largest hub.

This list covers power plant 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 17, 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 17, 2026 86% judged on-target in blind review

396Companies

16,280Contacts tracked

5,523Verified emails

Explore this list → Free signup · no credit card · 500 free credits

The 25 largest power plant maintenance contractors based in the United States

Ranked by team size

Top 25 of 396 power plant maintenance contractors based in the United States, ranked by team size, largest first. Data refreshed Sep 17, 2026. RevenueBase Smart Search rates how each company's information relates to power plant 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	NAES	Partial evidence	Issaquah, WA, United StatesHQ checked Sep 17, 2026	1,001-5,000	1,956 contacts →
	Partial evidence “NAES is the power generation industry’s largest independent services provider, with more than 40 years of experience managing risk and turning it into profits.” Source: RevenueBase Database · checked Sep 17, 2026
2	Power Plant Services	Partial evidence	Melrose Park, IL, United StatesHQ checked Sep 17, 2026	201-500	1,463 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 17, 2026
3	Shermco Industries	Partial evidence	Irving, TX, United StatesHQ checked Sep 17, 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 17, 2026
4	PIC Group, INC	Partial evidence	Atlanta, GA, United StatesHQ checked Sep 17, 2026	201-500	1,107 contacts →
	Partial evidence “PIC Group, Inc, established in 1988 and headquartered in Atlanta, GA, is a global provider of service solutions to the power generation industry.” Source: RevenueBase Database · checked Sep 17, 2026
5	Babcock Power	Partial evidence	Danvers, MA, United StatesHQ checked Sep 17, 2026	501-1,000	476 contacts →
	Partial evidence “Finding a single capable partner to support both large- and small-scale power generation needs can be challenging.” Source: RevenueBase Database · checked Sep 17, 2026
6	CAM Industrial Solutions LLC	Strong evidence	Houston, TX, United StatesHQ checked Sep 17, 2026	5,001-10,000	434 contacts →
	Strong evidence “With decades of refinery, petrochemical, fertilizer and power plant experience, CAM Industrial Solutions has become the standard in heavy industrial maintenance, turnaround and…” Source: RevenueBase Database · checked Sep 17, 2026
7	Concentric Power Services	Strong evidence	Carrollton, TX, United StatesHQ checked Sep 17, 2026	1,001-5,000	426 contacts →
	Strong 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 17, 2026
8	Allied Power	Strong evidence	Baton Rouge, LA, United StatesHQ checked Sep 17, 2026	5,001-10,000	408 contacts →
	Strong evidence “Allied Power is dedicated to delivering best-in-class maintenance, modifications, and project services.” Source: RevenueBase Database · checked Sep 17, 2026
9	Md&a	Partial evidence	Latham, NY, United StatesHQ checked Sep 17, 2026	501-1,000	379 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 17, 2026
10	Taw, An IPS Company	Indirect evidence	Greenville, SC, United StatesHQ checked Sep 17, 2026	501-1,000	305 contacts →
	Indirect evidence “Excellence in creating innovative solutions for the supply, control and use of energy.” Source: RevenueBase Database · checked Sep 17, 2026
11	RMS Energy Co, LLC	Strong evidence	Little Falls, MN, United StatesHQ checked Sep 17, 2026	501-1,000	288 contacts →
	Strong 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 17, 2026
12	GEM Incorporated	Partial evidence	Walbridge, OH, United StatesHQ checked Sep 17, 2026	1,001-5,000	270 contacts →
	Partial evidence “Contractor for Life At GEM Inc, we’re experienced problem solvers with the insight, integrity and resources to see you through your toughest challenges.” Source: RevenueBase Database · checked Sep 17, 2026
13	TEIC	Partial evidence	Duncan, SC, United StatesHQ checked Sep 17, 2026	51-200	252 contacts →
	Partial evidence “Serving Energy Utilities, Renewable Power providers, and Industrial Manufacturing leaders.” Source: RevenueBase Database · checked Sep 17, 2026
14	Rotating Machinery Services, INC	Indirect evidence	Bethlehem, PA, United StatesHQ checked Sep 17, 2026	201-500	251 contacts →
	Indirect evidence “Rotating Machinery Services (RMS)\| Engineering Reliability in Rotating Equipment Since 1998, Rotating Machinery Services (RMS) has redefined the aftermarket for compressors…” Source: RevenueBase Database · checked Sep 17, 2026
15	APM	Strong evidence	Pasadena, TX, United StatesHQ checked Sep 17, 2026	5,001-10,000	215 contacts →
	Strong evidence “Empowering the People Who Power Life Safety \| Quality \| Integrity APM has your construction and maintenance solutions.” Source: RevenueBase Database · checked Sep 17, 2026
16	Diamond Power International	Partial evidence	Lancaster, OH, United StatesHQ checked Sep 17, 2026	201-500	205 contacts →
	Partial evidence “At Diamond Power, we partner with customers to tackle even the most complex boiler cleaning issues.” Source: RevenueBase Database · checked Sep 17, 2026
17	Sdmyers	Strong evidence	Tallmadge, OH, United StatesHQ checked Sep 17, 2026	201-500	195 contacts →
	Strong evidence “SDMyers is the industry leader in transformer and substation maintenance and electric power system reliability.” Source: RevenueBase Database · checked Sep 17, 2026
18	Williams Industrial Services Group, LLC	Partial evidence	Atlanta, GA, United StatesHQ checked Sep 17, 2026	1,001-5,000	177 contacts →
	Partial evidence “Williams Industrial Services Group, LLC (Williams) offers a comprehensive range of general construction, maintenance and modification, specialty construction and maintenance, and…” Source: RevenueBase Database · checked Sep 17, 2026
19	National Electric Coil	Indirect evidence	Columbus, OH, United StatesHQ checked Sep 17, 2026	501-1,000	153 contacts →
	Indirect evidence “Leading independent manufacturer of generator stator and rotor windings, including inner-water and inner-hydrogen stator bars, roebel bars and diamond coils.” Source: RevenueBase Database · checked Sep 17, 2026
20	Southwest Electric CO	Indirect evidence	Oklahoma City, OK, United StatesHQ checked Sep 17, 2026	201-500	145 contacts →
	Indirect evidence “In 2025, Southwest Electric Co.” Source: RevenueBase Database · checked Sep 17, 2026
21	Allied Power Group	Partial evidence	Houston, TX, United StatesHQ checked Sep 17, 2026	51-200	143 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 17, 2026
22	Emerald Transformer	Indirect evidence	Mckinney, TX, United StatesHQ checked Sep 17, 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 17, 2026
23	Electric Motor & Contracting Co., INC	Indirect evidence	Chesapeake, VA, United StatesHQ checked Sep 17, 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 17, 2026
24	Kraft Power Corporation	Partial evidence	Woburn, MA, United StatesHQ checked Sep 17, 2026	51-200	130 contacts →
	Partial evidence “IN POWER FOR 60 YEARS Kraft Power was founded in 1965 in Boston, Massachusetts.” Source: RevenueBase Database · checked Sep 17, 2026
25	Power Services Group, INC	Strong evidence	Cape Coral, FL, United StatesHQ checked Sep 17, 2026	51-200	107 contacts →
	Strong evidence “Power Services Group (PSG) is the leading US-owned, independent provider of turnkey maintenance, repair, and overhaul solutions for steam and gas turbines.” Source: RevenueBase Database · checked Sep 17, 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: power plant 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 power plant maintenance contractors.
Partial evidence: Its own public description names part of power plant maintenance contractors, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name power plant 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 396 power plant maintenance contractors based in the United States

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 5,523 reachable decision-makers.

Free signup · no credit card

View the full list →

Power plant maintenance contractors based in the United States at a glance

As of Sep 17, 2026

33.9%Verified-email coverage

41.1Average contacts per company

11-50Median size (employees)

4.8%Largest-city concentration · Houston

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

111

11-50

145

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

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 396 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 plant 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 “power plant 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 power plant 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 power plant 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, 5,523 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 17, 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 plant 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 power plant maintenance contractors are there based in the United States?

RevenueBase identified 396 power plant 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?

NAES, headquartered in Issaquah, tops this list with the largest team on record.

Which city has the most power plant maintenance contractors?

Houston leads with 19 headquartered companies, followed by Baton Rouge (5) and Corpus Christi (4).

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 5,523 verified decision-maker contacts tracked across these 396 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 17, 2026.

Ready to reach these companies? Verified emails and direct dials for all 396 power plant maintenance contractors based in the United States. Start with a free account, no credit card.

Download this list →

Related lists

Power plant maintenance contractors by geography

Browse the directory

Browse: Companies home · All United States lists · All Power plant maintenance contractors lists · New lists

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.