Company lists · Data refreshed September 2026

Top 25 Plant maintenance contractors based in the United States

Name: 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 1,477 companies tracked

RevenueBase identified 1,477 plant maintenance contractors headquartered in the United States as of September 2026 and tracks 31,911 professional contacts across them, including 8,726 with verified work emails. Houston is the largest hub.

This list covers 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

1,477Companies

31,911Contacts tracked

8,726Verified emails

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The 25 largest plant maintenance contractors based in the United States

Ranked by team size

Top 25 of 1,477 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 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	Advanced Technology Services ATS	Partial evidence	Peoria, IL, United StatesHQ checked Sep 17, 2026	1,001-5,000	2,216 contacts →
	Partial evidence “Advanced Technology Services, Inc.(ATS) is a single source for industrial maintenance, technology and parts, offering a complete solution for support, training, monitoring and…” Source: RevenueBase Database · checked Sep 17, 2026
2	NAES	Indirect evidence	Issaquah, WA, United StatesHQ checked Sep 17, 2026	1,001-5,000	1,956 contacts →
	Indirect 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
3	Brown & Root Industrial Services, LLC	Partial evidence	Baton Rouge, LA, United StatesHQ checked Sep 17, 2026	5,001-10,000	1,940 contacts →
	Partial evidence “Brown & Root Industrial Services offers the full range of industrial services – engineering, construction, maintenance, turnaround, and specialty (painting, scaffolding…” Source: RevenueBase Database · checked Sep 17, 2026
4	Starcon International, INC	Partial evidence	La Porte, TX, United StatesHQ checked Sep 17, 2026	1,001-5,000	866 contacts →
	Partial evidence “Starcon is a national, full-service contractor offering comprehensive industrial and mechanical services in the oil & gas/refining, chemical/petrochemical, natural gas processing…” Source: RevenueBase Database · checked Sep 17, 2026
5	Lowe's PRO Supply	Indirect evidence	Mooresville, NC, United StatesHQ checked Sep 17, 2026	501-1,000	810 contacts →
	Indirect evidence “You promised your tenants beautiful, functional spaces for them to live, work, and play.” Source: RevenueBase Database · checked Sep 17, 2026
6	Airborne Maintenance And Engineering Services	Partial evidence	Wilmington, OH, United StatesHQ checked Sep 17, 2026	501-1,000	664 contacts →
	Partial evidence “Airborne Maintenance & Engineering Services is your first stop for maintenance when performance, delivery, and quality matter.” Source: RevenueBase Database · checked Sep 17, 2026
7	Maclellan Integrated Services, INC	Partial evidence	Lexington, KY, United StatesHQ checked Sep 17, 2026	1,001-5,000	650 contacts →
	Partial evidence “MacLellan Integrated Services provides critical process cleaning services, process equipment and robotics maintenance, production line side support, sludge and wastewater…” Source: RevenueBase Database · checked Sep 17, 2026
8	IH Services, INC	Indirect evidence	Sebastian, FL, United StatesHQ checked Sep 17, 2026	1,001-5,000	642 contacts →
	Indirect evidence “Where Facility Excellence Meets Defense Standards Ready • Secure • Lean We serve operators who cannot afford a facility failure: defense primes, secure federal installations…” Source: RevenueBase Database · checked Sep 17, 2026
9	USA Debusk	Indirect evidence	Deer Park, TX, United StatesHQ checked Sep 17, 2026	1,001-5,000	640 contacts →
	Indirect evidence “USA DeBusk serves the industrial infrastructure sector through a diverse and complementary suite of high-value traditional and specialty services for turnarounds, routine…” Source: RevenueBase Database · checked Sep 17, 2026
10	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
11	Allied Reliability	Partial evidence	Houston, TX, United StatesHQ checked Sep 17, 2026	201-500	402 contacts →
	Partial evidence “Allied Reliability provides reliability and maintenance solutions across the lifecycle of your assets to deliver required throughput at lowest operating cost.” Source: RevenueBase Database · checked Sep 17, 2026
12	Partner Industrial	Partial evidence	Houston, TX, United StatesHQ checked Sep 17, 2026	1,001-5,000	353 contacts →
	Partial evidence “Partner Industrial is a preferred and trusted provider of specialty maintenance services to the downstream energy, power generation, and industrial markets.” Source: RevenueBase Database · checked Sep 17, 2026
13	Debra-Kuempel	Indirect evidence	Cincinnati, OH, United StatesHQ checked Sep 17, 2026	1,001-5,000	346 contacts →
	Indirect evidence “With more than 70 years of experience, DeBra-Kuempel is a leading provider of mechanical, electrical, and plumbing services to Cincinnati, Dayton, Columbus, Evansville, Lexington…” Source: RevenueBase Database · checked Sep 17, 2026
14	Triangle Services	Partial evidence	Fort Lauderdale, FL, United StatesHQ checked Sep 17, 2026	1,001-5,000	330 contacts →
	Partial evidence “Triangle Services specializes in providing facility and equipment operations management, maintenance and support services specifically designed to meet our customers' needs.” Source: RevenueBase Database · checked Sep 17, 2026
15	Tifco Industries	Partial evidence	Cypress, TX, United StatesHQ checked Sep 17, 2026	201-500	323 contacts →
	Partial evidence “TIFCO Industries, a trusted name in the industry, stands as a premier single-source stocking distributor of high-quality maintenance and repair operation (MRO) products since 1961.” Source: RevenueBase Database · checked Sep 17, 2026
16	Tech24	Indirect evidence	Greenville, SC, United StatesHQ checked Sep 17, 2026	501-1,000	290 contacts →
	Indirect evidence “Tech 24 is the service industry leader, providing fast, complete, multi-regional repair and preventive plan solutions for commercial refrigeration, cooking, beverage and HVAC…” Source: RevenueBase Database · checked Sep 17, 2026
17	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
18	Industrial Service Solutions	Indirect evidence	Houston, TX, United StatesHQ checked Sep 17, 2026	1,001-5,000	235 contacts →
	Indirect evidence “Industrial Service Solutions provides nationwide field, shop, and supply services for a diverse set of industrial markets with breadth and depth in application knowledge and…” Source: RevenueBase Database · checked Sep 17, 2026
19	Velociti Services	Indirect evidence	Atlanta, GA, United StatesHQ checked Sep 17, 2026	1,001-5,000	208 contacts →
	Indirect evidence “Our Mission: To be the most respected facilities services company in the world.” Source: RevenueBase Database · checked Sep 17, 2026
20	AIR Force ONE	Indirect evidence	Dublin, OH, United StatesHQ checked Sep 17, 2026	201-500	201 contacts →
	Indirect evidence “Our approach puts you and your needs first.” Source: RevenueBase Database · checked Sep 17, 2026
21	Sack Company	Indirect evidence	Statesboro, GA, United StatesHQ checked Sep 17, 2026	501-1,000	184 contacts →
	Indirect evidence “With offices in Statesboro, GA, Savannah, GA, Atlanta, GA, Charlotte, NC, and Lexington, SC, The Sack Company is one of the largest industrial mechanical, electrical, plumbing…” Source: RevenueBase Database · checked Sep 17, 2026
22	JAY Industrial Repair	Indirect evidence	Birmingham, AL, United StatesHQ checked Sep 17, 2026	201-500	183 contacts →
	Indirect evidence “Jay Industrial Repair is an industrial service and manufacturing business focused on quality on-time solutions in electric motor and controls sales and services, and in-field…” Source: RevenueBase Database · checked Sep 17, 2026
23	ICR Services	Indirect evidence	Warren, MI, United StatesHQ checked Sep 17, 2026	201-500	181 contacts →
	Indirect evidence “Achieve world-class Overall Equipment Effectiveness (OEE) with Full-service MRO Solutions.” Source: RevenueBase Database · checked Sep 17, 2026
24	Greenwood, INC	Partial evidence	Greenville, SC, United StatesHQ checked Sep 17, 2026	501-1,000	176 contacts →
	Partial evidence “GreenWood, Inc, headquartered in Greenville, SC; is a WBENC Certified, fully licensed Industrial General Contractor.” Source: RevenueBase Database · checked Sep 17, 2026
25	Enprotech	Indirect evidence	Cleveland, OH, United StatesHQ checked Sep 17, 2026	201-500	171 contacts →
	Indirect evidence “To keep your production in motion, it takes an experienced partner dedicated to your equipment 24/7.” 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: 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 plant maintenance contractors.
Partial evidence: Its own public description names part of 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 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 1,477 plant maintenance contractors based in the United States

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Plant maintenance contractors based in the United States at a glance

As of Sep 17, 2026

27.3%Verified-email coverage

21.6Average contacts per company

11-50Median size (employees)

2.2%Largest-city concentration · Houston

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

622

11-50

471

51-200

260

201-500

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 1,477 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 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 “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 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 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, 8,726 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.

Plant maintenance contractors by metro

Plant maintenance contractors in Houston32

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 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 plant maintenance contractors are there based in the United States?

RevenueBase identified 1,477 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?

Advanced Technology Services ATS, headquartered in Peoria, tops this list with the largest team on record.

Which city has the most plant maintenance contractors?

Houston leads with 32 headquartered companies, followed by Atlanta (16) and New York (14).

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 8,726 verified decision-maker contacts tracked across these 1,477 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.

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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.