Company lists · Data refreshed September 2026

Top 25 Mechanical systems maintenance worldwide

Name: Mechanical systems maintenance worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 10,150 companies tracked

RevenueBase identified 10,150 mechanical systems maintenance worldwide as of September 2026 and tracks 112,531 professional contacts across them, including 31,428 with verified work emails. The United States is the largest market and Dubai the largest hub.

This list covers mechanical systems maintenance 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 20, 2026. Country and city lists for mechanical systems maintenance 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 20, 2026 86% judged on-target in blind review

10,150Companies

112,531Contacts tracked

31,428Verified emails

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The 25 largest mechanical systems maintenance worldwide

Ranked by team size

Top 25 of 10,150 mechanical systems maintenance worldwide, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to mechanical systems maintenance: 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	Equans Belux	Indirect evidence	Brussels, BelgiumHQ checked Sep 20, 2026	5,001-10,000	5,297 contacts →
	Indirect evidence “What if you could use your talent to contribute to the great challenges of tomorrow?” Source: RevenueBase Database · checked Sep 20, 2026
2	Comfort Systems USA	Partial evidence	Houston, TX, United StatesHQ checked Sep 20, 2026	10001+	1,330 contacts →
	Partial evidence “Comfort Systems USA \| Quality People.” Source: RevenueBase Database · checked Sep 20, 2026
3	Bravida Danmark A S	Indirect evidence	Brøndby, DenmarkHQ checked Sep 20, 2026	1,001-5,000	1,298 contacts →
	Indirect evidence “Bravida Danmark er blandt landets største tekniske installations- og servicevirksomheder med over medarbejdere i byer landet over, og vi er en arbejdsplads, der har plads til alle.” Source: RevenueBase Database · checked Sep 20, 2026
4	Mckenney's, INC	Partial evidence	Atlanta, GA, United StatesHQ checked Sep 20, 2026	1,001-5,000	1,077 contacts →
	Partial evidence “McKenney’s is the Southeast’s most trusted name in facility construction, operation and maintenance.” Source: RevenueBase Database · checked Sep 20, 2026
5	Irmãos Passaúra S A	Indirect evidence	Curitiba, BrazilHQ checked Sep 20, 2026	1,001-5,000	1,075 contacts →
	Indirect evidence “Empresa de Montagem e Manutenção Industrial” Source: RevenueBase Database · checked Sep 20, 2026
6	GSH Group	Indirect evidence	Parsippany, NJ, United StatesHQ checked Sep 20, 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 20, 2026
7	Ventec S.A	Indirect evidence	Casablanca, MoroccoHQ checked Sep 20, 2026	1,001-5,000	959 contacts →
	Indirect evidence “La Société Ventec a été créée au Maroc en 1949 par Monsieur Albert MARQUET Président Directeur Général de Ventec en France.” Source: RevenueBase Database · checked Sep 20, 2026
8	Cmta, INC	Indirect evidence	Louisville, KY, United StatesHQ checked Sep 20, 2026	501-1,000	936 contacts →
	Indirect evidence “CMTA is part of Legence, a Nasdaq Listed company.” Source: RevenueBase Database · checked Sep 20, 2026
9	Bravida Norge AS	Indirect evidence	Oslo, NorwayHQ checked Sep 20, 2026	1,001-5,000	891 contacts →
	Indirect evidence “Bravida gir bygninger liv.” Source: RevenueBase Database · checked Sep 20, 2026
10	FMCO	Indirect evidence	Dammam, Saudi ArabiaHQ checked Sep 20, 2026	1,001-5,000	834 contacts →
	Indirect evidence “FMCO is a multidisciplinary company that deals with the coordination of works between buildings, individuals, infrastructure, energy, water and drainage services in order to…” Source: RevenueBase Database · checked Sep 20, 2026
11	Terrabel	Indirect evidence	Contagem, BrazilHQ checked Sep 20, 2026	1,001-5,000	733 contacts →
	Indirect evidence “Fundada em Belo Horizonte nos anos 70, atualmente instalada em amplas dependências na cidade de Contagem, a TERRABEL dispõe de uma equipe de engenheiros, técnicos, mecânicos…” Source: RevenueBase Database · checked Sep 20, 2026
12	Universal Voltas LLC	Indirect evidence	Abu Dhabi, United Arab EmiratesHQ checked Sep 20, 2026	1,001-5,000	681 contacts →
	Indirect evidence “Universal Voltas is a leader in Electromechanical Projects and Facility Management Services, providing state of the art solutions to its clients.” Source: RevenueBase Database · checked Sep 20, 2026
13	Temon Serviços	Indirect evidence	São Paulo, BrazilHQ checked Sep 20, 2026	1,001-5,000	628 contacts →
	Indirect evidence “A Temon Serviços é a empresa líder na engenharia de manutenção e operação de sistemas prediais de alta complexidade.” Source: RevenueBase Database · checked Sep 20, 2026
14	Scania Industrial Maintenance AB	Partial evidence	Södertälje, SwedenHQ checked Sep 20, 2026	501-1,000	627 contacts →
	Partial evidence “Scania Industrial Maintenance support Scania in Sweden with technical services.” Source: RevenueBase Database · checked Sep 20, 2026
15	Deem, LLC	Partial evidence	Indianapolis, IN, United StatesHQ checked Sep 20, 2026	1,001-5,000	539 contacts →
	Partial evidence “DEEM, LLC is a mechanical and electrical company centrally located in Fishers, Indiana with satellite offices throughout the Midwest down to the southeastern United States.” Source: RevenueBase Database · checked Sep 20, 2026
16	AL Shirawi Facilities Management	Indirect evidence	Dubai, United Arab EmiratesHQ checked Sep 20, 2026	1,001-5,000	442 contacts →
	Indirect evidence “Al Shirawi’s progression in becoming a fully fledged Facilities Management Service Provider has been achieved over 35 years of strategic planning and development.” Source: RevenueBase Database · checked Sep 20, 2026
17	Pacific RIM Mechanical	Partial evidence	San Diego, CA, United StatesHQ checked Sep 20, 2026	501-1,000	441 contacts →
	Partial evidence “At Pacific Rim Mechanical, we deliver comprehensive mechanical contracting and facility services across Southern California.” Source: RevenueBase Database · checked Sep 20, 2026
18	Heating Cooling	Indirect evidence	Sao Paulo, BrazilHQ checked Sep 20, 2026	501-1,000	436 contacts →
	Indirect evidence “Desde 1974, a Heating & Cooling atua no segmento de engenharia de instalação de Sistemas de Ar-Condicionado, Ventilação e Exaustão Mecânica, com mais de 2.500 projetos executados.” Source: RevenueBase Database · checked Sep 20, 2026
19	MEISA	Indirect evidence	Argamasilla De Calatrava, SpainHQ checked Sep 20, 2026	1,001-5,000	428 contacts →
	Indirect evidence “MEISA (Proyectos y Mantenimientos Mecánicos, Eléctricos y de Instrumentación), se constituyó en 1998, viendo las oportunidades de mercado de negocio y demanda creciente de los…” Source: RevenueBase Database · checked Sep 20, 2026
20	Fives Maintenance	Partial evidence	Montévrain, FranceHQ checked Sep 20, 2026	501-1,000	416 contacts →
	Partial evidence “Spécialiste de la maintenance industrielle depuis plus de vingt ans, Fives intervient dans le cadre de contrats à obligation de résultats pour assurer la maintenance préventive…” Source: RevenueBase Database · checked Sep 20, 2026
21	AIR Systems, INC	Partial evidence	San Jose, CA, United StatesHQ checked Sep 20, 2026	201-500	348 contacts →
	Partial evidence “Whether building quality work environments, valuable relationships or community ties, Air Systems never cuts corners.” Source: RevenueBase Database · checked Sep 20, 2026
22	United Mechanical	Strong evidence	San Jose, CA, United StatesHQ checked Sep 20, 2026	201-500	346 contacts →
	Strong 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 20, 2026
23	Debra-Kuempel	Partial evidence	Cincinnati, OH, United StatesHQ checked Sep 20, 2026	1,001-5,000	346 contacts →
	Partial 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 20, 2026
24	Logista Hometech	Partial evidence	Arras, FranceHQ checked Sep 20, 2026	1,001-5,000	344 contacts →
	Partial evidence “Spécialiste de la maintenance immobilière, nous entretenons et dépannons les équipements de chauffage, VMC, plomberie, sanitaire, climatisation… pour les bailleurs sociaux et les…” Source: RevenueBase Database · checked Sep 20, 2026
25	Jaguar Building Services LTD	Strong evidence	London, United KingdomHQ checked Sep 20, 2026	501-1,000	341 contacts →
	Strong evidence “Since 1988, Jaguar Building Services has been a trusted leader in the mechanical, electrical, and public health maintenance of some of London's most prestigious landmark buildings.” Source: RevenueBase Database · checked Sep 20, 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: mechanical systems maintenance. 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 mechanical systems maintenance.
Partial evidence: Its own public description names part of mechanical systems maintenance, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name mechanical systems maintenance. 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 10,150 mechanical systems maintenance worldwide

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Mechanical systems maintenance worldwide at a glance

As of Sep 20, 2026

27.9%Verified-email coverage

11.1Average contacts per company

11-50Median size (employees)

1.2%Largest-city concentration · Dubai

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

4,249

11-50

4,045

51-200

1,319

201-500

281

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency is reported on each country list linked below.

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 mechanical systems maintenance, 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: Every country. Country and city lists for mechanical systems maintenance are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “mechanical systems maintenance”. 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 mechanical systems maintenance), 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 mechanical systems maintenance, 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, 31,428 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.

Mechanical systems maintenance by location

39 lists · largest first

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

Countries

Cities

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 mechanical systems maintenance, 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 mechanical systems maintenance are there worldwide?

RevenueBase identified 10,150 mechanical systems maintenance 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?

Equans Belux, headquartered in Worldwide, tops this list with the largest team on record.

Which country has the most mechanical systems maintenance?

The United States leads with 3,836 companies, followed by Brazil (630) and Italy (565). Every mechanical systems maintenance list by country and city is linked on this page.

Which city has the most mechanical systems maintenance?

Dubai leads with 126 headquartered companies, followed by Sao Paulo (121) and Houston (74).

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 31,428 verified decision-maker contacts tracked across these 10,150 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.