Company lists · Data refreshed September 2026

Top 25 Organ maintenance contractors worldwide

Name: Organ maintenance contractors worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 17, 2026 510 companies tracked

RevenueBase identified 510 organ maintenance contractors worldwide as of September 2026 and tracks 7,703 professional contacts across them, including 2,245 with verified work emails and 0 with mobile numbers. The United States is the largest market and Houston the largest hub.

This list covers organ maintenance contractors worldwide, 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. Country and city lists for organ maintenance contractors follow the table.

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

510Companies

7,703Contacts tracked

2,245Verified emails

0Mobile numbers

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The 25 largest organ maintenance contractors worldwide

Ranked by team size

Top 25 of 510 organ maintenance contractors worldwide, ranked by team size, largest first. Data refreshed Sep 17, 2026. RevenueBase Smart Search rates how each company's information relates to organ 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	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
2	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
3	Rudolph Libbe INC	Indirect evidence	Walbridge, OH, United StatesHQ checked Sep 17, 2026	201-500	209 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 17, 2026
4	Oscar W. Larson Company	Indirect evidence	Clarkston, MI, United StatesHQ checked Sep 17, 2026	1,001-5,000	187 contacts →
	Indirect evidence “For 80 years, Oscar W.” Source: RevenueBase Database · checked Sep 17, 2026
5	Hill York	Strong evidence	Dania Beach, FL, United StatesHQ checked Sep 17, 2026	201-500	168 contacts →
	Strong evidence “Hill York is a full service contractor that offers a full array of energy efficient air-conditioning services from concept to completion, maintenance to repair and everything in…” Source: RevenueBase Database · checked Sep 17, 2026
6	Binsky Snyder	Indirect evidence	Ewing, NJ, United StatesHQ checked Sep 17, 2026	201-500	157 contacts →
	Indirect evidence “Since 1938 Binsky Mechanical has set itself apart as the leader in world-class mechanical construction.” Source: RevenueBase Database · checked Sep 17, 2026
7	Harrell-Fish, INC	Partial evidence	Bloomington, IN, United StatesHQ checked Sep 17, 2026	201-500	133 contacts →
	Partial evidence “With a full range of services, including plan and spec work, design and build capabilities, full 24-hour emergency service as well as maintenance and performance contracting, HFI…” Source: RevenueBase Database · checked Sep 17, 2026
8	Arkel Constructors	Strong evidence	Baton Rouge, LA, United StatesHQ checked Sep 17, 2026	51-200	105 contacts →
	Strong evidence “Arkel Constructors is a general contractor located in Louisiana with 3 divisions focusing on Commercial Construction, Industrial Construction, and Facility Maintenance.” Source: RevenueBase Database · checked Sep 17, 2026
9	Protec Building Services	Strong evidence	San Diego, CA, United StatesHQ checked Sep 17, 2026	201-500	102 contacts →
	Strong evidence “ProTec is Southern California and Southern Nevada’s premier HOA General Contractor specializing in the maintenance, repair, reconstruction, plumbing, and inspection of common…” Source: RevenueBase Database · checked Sep 17, 2026
10	IMI Industrial Services Group	Partial evidence	Watkinsville, GA, IndiaHQ checked Sep 17, 2026	201-500	102 contacts →
	Partial evidence “IMI Industrial Services Group is a verified VOSB Licensed General Contractor, in business since 1988.” Source: RevenueBase Database · checked Sep 17, 2026
11	Mccloskey Mechanical Contractors, INC	Partial evidence	Blackwood, NJ, United KingdomHQ checked Sep 17, 2026	201-500	100 contacts →
	Partial evidence “McCloskey Mechanical Contractors is a national, family-owned mechanical contractor that serves as a one-stop-shop for all of your HVACR/Plumbing needs - from design to…” Source: RevenueBase Database · checked Sep 17, 2026
12	ROY	Indirect evidence	Anjou, QC, CanadaHQ checked Sep 17, 2026	1,001-5,000	92 contacts →
	Indirect evidence “Nous offrons une gamme complète de services intégrés d'entretien d'immeubles par l'intermédiaire de cinq filiales spécialisées et plus de 1 500 employés à votre service.” Source: RevenueBase Database · checked Sep 17, 2026
13	Indoor Environmental Services	Strong evidence	Sacramento, CA, United StatesHQ checked Sep 17, 2026	51-200	84 contacts →
	Strong evidence “Indoor Environmental Services (IES) is a Mechanical Contractor offering HVAC Maintenance, Service, and Facility Solutions to Commercial and Industrial customers throughout the…” Source: RevenueBase Database · checked Sep 17, 2026
14	Power Component Systems, Inc. PCS	Indirect evidence	Hanover, MD, United StatesHQ checked Sep 17, 2026	201-500	80 contacts →
	Indirect evidence “Three decades of continued growth and diversification has positioned PCS, Inc.” Source: RevenueBase Database · checked Sep 17, 2026
15	Raven Mechanical, LP	Partial evidence	Houston, TX, United StatesHQ checked Sep 17, 2026	51-200	72 contacts →
	Partial evidence “Raven Mechanical, founded 1979, is a full service mechanical contractor specializing in Plumbing and HVAC service and construction.” Source: RevenueBase Database · checked Sep 17, 2026
16	Humphrey Company, LTD	Indirect evidence	Houston, TX, United StatesHQ checked Sep 17, 2026	501-1,000	69 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 17, 2026
17	Prairie Mechanical Corporation	Partial evidence	Omaha, NE, United StatesHQ checked Sep 17, 2026	51-200	68 contacts →
	Partial evidence “Prairie Mechanical Corporation is a privately held mechanical contractor serving the Greater Omaha Area.” Source: RevenueBase Database · checked Sep 17, 2026
18	Hill Services	Partial evidence	Memphis, TN, United StatesHQ checked Sep 17, 2026	51-200	66 contacts →
	Partial evidence “Commercial & Industrial Facility Maintenance Services including: Plumbing, Piping, & Camera Technologies Pipe Relining, Manhole Rehabilitation HVAC, Refrigeration, Building…” Source: RevenueBase Database · checked Sep 17, 2026
19	Carolina Chillers, LLC	Partial evidence	Ladson, SC, United StatesHQ checked Sep 17, 2026	51-200	65 contacts →
	Partial evidence “Carolina Chillers, LLC specializes in HVAC service, installation, maintenance agreements, parts, equipment and equipment relocation, as well as complete system evaluations to…” Source: RevenueBase Database · checked Sep 17, 2026
20	Granite State Plumbing & Heating LLC	Partial evidence	Weare, NH, United StatesHQ checked Sep 17, 2026	51-200	60 contacts →
	Partial evidence “The main cores of our business are commercial mechanical contracting, commercial plumbing and HVACR service, and preventative maintenance.” Source: RevenueBase Database · checked Sep 17, 2026
21	Quick Servant Company, INC	Partial evidence	Columbia, MD, United StatesHQ checked Sep 17, 2026	51-200	58 contacts →
	Partial evidence “When inviting a contractor to perform a service in your business, you look for someone with years of experience and a level of integrity to match.” Source: RevenueBase Database · checked Sep 17, 2026
22	Us&s, INC	Partial evidence	Greenville, SC, United StatesHQ checked Sep 17, 2026	201-500	58 contacts →
	Partial evidence “US & S is a facility maintenance and support service provider - whether it's the one and only project your organization will ever need or if you have more complex long-term…” Source: RevenueBase Database · checked Sep 17, 2026
23	NAC Mechanical Services	Partial evidence	Gaithersburg, MD, United StatesHQ checked Sep 17, 2026	51-200	57 contacts →
	Partial evidence “One of the Washington Business Journal's "Best Places to Work" and "Top Mechanical Contractors", NAC (Noyes Air Conditioning) has flourished since 1983 by preserving the values of…” Source: RevenueBase Database · checked Sep 17, 2026
24	American Combustion Industries, INC	Indirect evidence	Glenn Dale, MD, United StatesHQ checked Sep 17, 2026	51-200	56 contacts →
	Indirect evidence “American Combustion Industries (ACI) is a trusted leader in mechanical contracting and facility support services across Maryland, Washington, DC, and Virginia.” Source: RevenueBase Database · checked Sep 17, 2026
25	Palmer & Sicard, INC	Partial evidence	Exeter, NH, United KingdomHQ checked Sep 17, 2026	51-200	56 contacts →
	Partial evidence “Palmer & Sicard is a comprehensive mechanical contractor with the skills, knowledge and commitment to do the job right; from project conception to providing care long after the…” 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: organ 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 organ maintenance contractors.
Partial evidence: Its own public description names part of organ maintenance contractors, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name organ 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 510 organ maintenance contractors worldwide

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Organ maintenance contractors worldwide at a glance

As of Sep 17, 2026

29.1%Verified-email coverage

15.1Average contacts per company

11-50Median size (employees)

1.8%Largest-city concentration · Houston

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

224

11-50

176

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

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 organ 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.
Coverage: 4 countries, largest first: the United States, Canada, the United Kingdom, the Netherlands. Country and city lists for organ maintenance contractors are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “organ 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 organ 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 organ maintenance contractors, and records with no verified work email.
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, 2,245 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.

Organ maintenance contractors by location

4 lists · largest first

Every Organ maintenance contractors list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

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 organ 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 organ maintenance contractors are there worldwide?

RevenueBase identified 510 organ maintenance contractors worldwide 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?

GEM Incorporated, headquartered in Walbridge, tops this list with the largest team on record.

Which country has the most organ maintenance contractors?

The United States leads with 378 companies, followed by Canada (51) and the United Kingdom (43). Every organ maintenance contractors list by country and city is linked on this page.

Which city has the most organ maintenance contractors?

Houston leads with 9 headquartered companies, followed by Calgary (5) and Columbia (5).

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 2,245 verified decision-maker contacts tracked across these 510 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.