Company lists · Data refreshed September 2026

Top 25 Preventive maintenance contractors based in the United States

Name: Preventive 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 1,920 companies tracked

RevenueBase identified 1,920 preventive maintenance contractors headquartered in the United States as of September 2026 and tracks 37,572 professional contacts across them, including 11,272 with verified work emails. Houston is the largest hub.

This list covers preventive 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

1,920Companies

37,572Contacts tracked

11,272Verified emails

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The 25 largest preventive maintenance contractors based in the United States

Ranked by team size

Top 25 of 1,920 preventive 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 preventive 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	Universal Plant Services	Indirect evidence	Deer Park, TX, United StatesHQ checked Sep 17, 2026	501-1,000	1,371 contacts →
	Indirect evidence “Universal Plant Services (UPS) is the industry's foremost specialists in rotating and reciprocating equipment services.” Source: RevenueBase Database · checked Sep 17, 2026
3	GSH Group	Indirect evidence	Parsippany, NJ, United StatesHQ checked Sep 17, 2026	1,001-5,000	1,017 contacts →
	Indirect evidence “GSH Group is a premier provider of global integrated facilities management and building engineering services.” Source: RevenueBase Database · checked Sep 17, 2026
4	Hydrochempsc	Partial evidence	Deer Park, TX, United StatesHQ checked Sep 17, 2026	5,001-10,000	718 contacts →
	Partial evidence “HPC Industrial, a Clean Harbors business, is the leading provider of specialty maintenance services and technology solutions to the critical energy infrastructure in the United…” Source: RevenueBase Database · checked Sep 17, 2026
5	Vixxo Facility Solutions	Indirect evidence	Scottsdale, AZ, United StatesHQ checked Sep 17, 2026	501-1,000	679 contacts →
	Indirect evidence “At Vixxo Facility Solutions, we pride ourselves on delivering unparalleled expertise to create outstanding customer experiences.” Source: RevenueBase Database · checked Sep 17, 2026
6	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
7	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
8	Pacific RIM Mechanical	Indirect evidence	San Diego, CA, United StatesHQ checked Sep 17, 2026	501-1,000	441 contacts →
	Indirect evidence “At Pacific Rim Mechanical, we deliver comprehensive mechanical contracting and facility services across Southern California.” Source: RevenueBase Database · checked Sep 17, 2026
9	CAM Industrial Solutions LLC	Partial evidence	Houston, TX, United StatesHQ checked Sep 17, 2026	5,001-10,000	434 contacts →
	Partial 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
10	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
11	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
12	United Mechanical	Indirect evidence	San Jose, CA, United StatesHQ checked Sep 17, 2026	201-500	346 contacts →
	Indirect evidence “United Mechanical specializes in HVAC and Plumbing systems design, construction, retrofit, repair, and 24/7 emergency service for commercial and industrial properties throughout…” 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	Remco INC	Indirect evidence	Mechanicsburg, PA, United StatesHQ checked Sep 17, 2026	501-1,000	338 contacts →
	Indirect evidence “Remco, Inc.” Source: RevenueBase Database · checked Sep 17, 2026
15	Tech24	Partial evidence	Greenville, SC, United StatesHQ checked Sep 17, 2026	501-1,000	290 contacts →
	Partial 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
16	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
17	BFC Solutions	Indirect evidence	Nashville, TN, United StatesHQ checked Sep 17, 2026	501-1,000	241 contacts →
	Indirect evidence “BFC Solutions is the leader in essential HVAC services for commercial multi-site facilities and chains nationwide.” Source: RevenueBase Database · checked Sep 17, 2026
18	Holaday-Parks, INC	Partial evidence	Tukwila, WA, United StatesHQ checked Sep 17, 2026	201-500	218 contacts →
	Partial evidence “As one of the largest full service mechanical contractors headquartered in the Pacific Northwest, Holaday Parks has grown well beyond Seattle.” Source: RevenueBase Database · checked Sep 17, 2026
19	Pueblo Mechanical & Controls	Indirect evidence	Phoenix, AZ, United StatesHQ checked Sep 17, 2026	501-1,000	214 contacts →
	Indirect evidence “Pueblo was founded in Arizona to achieve sustained and profitable growth by providing services that consistently satisfy the needs and expectations of its customers.” Source: RevenueBase Database · checked Sep 17, 2026
20	The DM Burr Group	Indirect evidence	Flint, MI, United StatesHQ checked Sep 17, 2026	1,001-5,000	211 contacts →
	Indirect evidence “The DM Burr Group is a multifaceted company that has many divisions that are complementary to one another giving our customers the easiest way possible to bundle services together…” Source: RevenueBase Database · checked Sep 17, 2026
21	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
22	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
23	Star Service INC	Indirect evidence	Baton Rouge, LA, United StatesHQ checked Sep 17, 2026	201-500	201 contacts →
	Indirect evidence “Our commitment to the commercial HVAC industry has remained unchanged since we began in 1952.” Source: RevenueBase Database · checked Sep 17, 2026
24	Emcor Services NEW England Mechanical	Indirect evidence	Windsor, CT, United StatesHQ checked Sep 17, 2026	201-500	195 contacts →
	Indirect evidence “EMCOR Services New England Mechanical Services (NEMSI) offers a full range of mechanical, electrical, plumbing, sheetmetal, building automation, and facilities services that…” Source: RevenueBase Database · checked Sep 17, 2026
25	Haynes Mechanical Systems	Indirect evidence	Greenwood Village, CO, United StatesHQ checked Sep 17, 2026	201-500	190 contacts →
	Indirect evidence “Haynes Mechanical Systems has been keeping commercial buildings running strong since 1968.” 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: preventive 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 preventive maintenance contractors.
Partial evidence: Its own public description names part of preventive maintenance contractors, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name preventive 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 1,920 preventive maintenance contractors based in the United States

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Preventive maintenance contractors based in the United States at a glance

As of Sep 17, 2026

30.0%Verified-email coverage

19.6Average contacts per company

11-50Median size (employees)

2.3%Largest-city concentration · Houston

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

712

11-50

683

51-200

372

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 1,920 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 preventive 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 “preventive 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 preventive 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 preventive 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, 11,272 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.

Preventive maintenance contractors by metro

Preventive maintenance contractors in Houston44

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

RevenueBase identified 1,920 preventive 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 preventive maintenance contractors?

Houston leads with 44 headquartered companies, followed by New York (19) and Miami (17).

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 11,272 verified decision-maker contacts tracked across these 1,920 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.