Company lists · Data refreshed October 2026

Top 25 Mechanical systems contractors worldwide

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

Compiled by the RevenueBase Data Team Data refreshed Oct 18, 2026 19,797 companies tracked

RevenueBase identified 19,797 company matches for mechanical systems contractors worldwide as of October 2026 and tracks 256,733 professional contacts across them, including 80,084 with verified work emails. The United States is the largest market and Sao Paulo the largest hub.

This list covers company matches for mechanical systems contractors worldwide, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed October 18, 2026. Country and city lists for mechanical systems contractors follow the table.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 RevenueBase SmartSearch · Exact Recorded Oct 18, 2026 How this list was built

19,797Companies

256,733Contacts tracked

80,084Verified emails

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The 25 largest mechanical systems contractors worldwide

Ranked by team size

Top 25 of 19,797 company matches for mechanical systems contractors worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 18, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Equans	Exact match	Courbevoie, FranceHQ recorded Oct 18, 2026	10001+	5,490 contacts →
	Exact match “Equans, a Bouygues group company, is a world leader in multi-technical services with offices in 20 country hubs.” Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
2	Equans Belux	Exact match	Brussels, BelgiumHQ recorded Oct 18, 2026	5,001-10,000	5,347 contacts →
	Exact match “What if you could use your talent to contribute to the great challenges of tomorrow?” Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
3	Acco Engineered Systems	Exact match	Pasadena, CA, United StatesHQ recorded Oct 18, 2026	5,001-10,000	2,573 contacts →
	Exact match “Since 1934, owners and builders have selected ACCO Engineered Systems to design, install, and maintain more than mechanical projects.” Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
4	Tdindustries, INC	Exact match	Dallas, TX, United StatesHQ recorded Oct 18, 2026	1,001-5,000	1,925 contacts →
	Exact match “TDIndustries delivers a comprehensive approach to Facility Services and Mechanical Construction.” Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
5	Modern Niagara	Exact match	Kanata, ON, CanadaHQ recorded Oct 18, 2026	1,001-5,000	1,585 contacts →
	Exact match “We build for life.” Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
6	Emcor Group, INC	Exact match	Norwalk, CT, United StatesHQ recorded Oct 18, 2026	10001+	1,443 contacts →
	Exact match “A Fortune 500® company and a member of the S&P 500, EMCOR Group, Inc.(NYSE: EME) is a leader in mechanical and electrical construction, industrial and energy infrastructure, and…” Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
7	Macdonald-Miller Facility Solutions	Exact match	Seatac, WA, United StatesHQ recorded Oct 18, 2026	1,001-5,000	1,365 contacts →
	Exact match “MacDonald-Miller Facility Solutions is a full-service, design-build mechanical contractor in the Pacific Northwest.” Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
8	Comfort Systems USA	Exact match	Houston, TX, United StatesHQ recorded Oct 18, 2026	10001+	1,354 contacts →
	Exact match “Comfort Systems USA \| Quality People.” Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
9	Bravida Danmark A S	Exact match	Brøndby, DenmarkHQ recorded Oct 18, 2026	1,001-5,000	1,342 contacts →
	Exact match “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.” Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
10	Mckenney's, INC	Exact match	Atlanta, GA, United StatesHQ recorded Oct 18, 2026	1,001-5,000	1,088 contacts →
	Exact match “McKenney’s is the Southeast’s most trusted name in facility construction, operation and maintenance.” Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
11	Harris	Exact match	St. Paul, MN, United StatesHQ recorded Oct 18, 2026	1,001-5,000	1,025 contacts →
	Exact match “Harris is a leading national mechanical contractor specializing in design and engineering, construction, controls, service, manufacturing, conveyors and end-to-end building…” Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
12	Cmta, INC	Exact match	Louisville, KY, United StatesHQ recorded Oct 18, 2026	501-1,000	1,016 contacts →
	Exact match “CMTA is part of Legence, a Nasdaq Listed company.” Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
13	Ventec S.A	Exact match	Casablanca, MoroccoHQ recorded Oct 18, 2026	1,001-5,000	971 contacts →
	Exact match “La Société Ventec a été créée au Maroc en 1949 par Monsieur Albert MARQUET Président Directeur Général de Ventec en France.” Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
14	Stellar	Exact match	Jacksonville, FL, United StatesHQ recorded Oct 18, 2026	501-1,000	922 contacts →
	Exact match “Stellar, headquartered in Jacksonville, Florida, is a fully integrated firm focusing on design, engineering, construction, refrigeration, and mechanical and electrical services…” Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
15	Bravida Norge AS	Exact match	Oslo, NorwayHQ recorded Oct 18, 2026	1,001-5,000	898 contacts →
	Exact match “Bravida gir bygninger liv.” Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
16	AHERN	Exact match	Fond Du Lac, WI, United StatesHQ recorded Oct 18, 2026	1,001-5,000	884 contacts →
	Exact match “Ahern is a mechanical and fire protection contractor specializing in HVAC, Plumbing, Building Controls, Sprinkler, Extinguisher & Alarm and Fabrication for construction and…” Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
17	HTS Engineering	Exact match	Toronto, ON, CanadaHQ recorded Oct 18, 2026	1,001-5,000	733 contacts →
	Exact match “Your success is our success.” Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
18	Apollo Mechanical Contractors	Exact match	Kennewick, WA, United StatesHQ recorded Oct 18, 2026	1,001-5,000	718 contacts →
	Exact match “Apollo is based in Kennewick, Washington, performing Full Mechanical projects across the United States and around the world.” Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
19	Baker Group	Exact match	Ankeny, IA, United StatesHQ recorded Oct 18, 2026	1,001-5,000	710 contacts →
	Exact match “Established in 1963, Baker Group is Iowa’s premier full-service specialty contractor-serving commercial, industrial, institutional, and mission-critical markets across the country.” Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
20	Universal Voltas LLC	Exact match	Abu Dhabi, United Arab EmiratesHQ recorded Oct 18, 2026	1,001-5,000	667 contacts →
	Exact match “Universal Voltas is a leader in Electromechanical Projects and Facility Management Services, providing state of the art solutions to its clients.” Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
21	Kropman	Exact match	Nijmegen, NetherlandsHQ recorded Oct 18, 2026	501-1,000	619 contacts →
	Exact match “Kropman ontwerpt, bouwt en onderhoudt en beheert gebouwgebonden installaties.” Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
22	F.E. Moran Group Of Companies	Exact match	Northbrook, IL, United StatesHQ recorded Oct 18, 2026	1,001-5,000	592 contacts →
	Exact match “At F.E.” Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
23	Colonialwebb	Exact match	Richmond, VA, United StatesHQ recorded Oct 18, 2026	1,001-5,000	585 contacts →
	Exact match “ColonialWebb is built on a simple belief: when people feel like they belong and have a purpose, they can achieve almost anything.” Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
24	Murray Company	Exact match	Rancho Dominguez, CA, United StatesHQ recorded Oct 18, 2026	1,001-5,000	583 contacts →
	Exact match “Proven experience in conjunction with fully-equipped fabrication facilities and extensive engineering expertise.” Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
25	Efeco LLC Subsidiary Of Arabtec Holding Pjsc	Exact match	Dubai, United Arab EmiratesHQ recorded Oct 18, 2026	5,001-10,000	579 contacts →
	Exact match “EFECO is one of the UAE's principal MEP services provider, delivering innovative, high quality, life-cycle solutions for our customers.” Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “mechanical systems contractors”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 19,797 mechanical systems contractors worldwide

See the full list, filter by size, metro and specialty, and access 80,084 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Mechanical systems contractors worldwide at a glance

As of Oct 18, 2026

31.2%Verified-email coverage

13.0Average contacts per company

11-50Median size (employees)

0.8%Largest-city concentration · Sao Paulo

Oct 18, 2026Page data refreshed

Companies by employee count

1-10

7,513

11-50

8,134

51-200

3,007

201-500

655

501-1,000

168

1,001-5,000

106

5,001-10,000

10001+

Email recency is reported on each country list linked below.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
Coverage: Every country. Country and city lists for mechanical systems contractors are linked below.
What qualifies: Company records worldwide whose business descriptions match “mechanical systems contractors” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 80,084 professional contacts with verified work emails across the full matched dataset. 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 October 18, 2026. Lists refresh periodically as the graph is re-checked.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Mechanical systems contractors by location

63 lists · largest first

Every Mechanical systems contractors 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 SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “mechanical systems contractors”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many mechanical systems contractors are there worldwide?

RevenueBase identified 19,797 company matches for mechanical systems contractors worldwide as of October 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Equans tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which country has the most mechanical systems contractors?

The United States leads with 6,084 companies, followed by Italy (1,413) and the United Kingdom (1,360). Every mechanical systems contractors list by country and city is linked on this page.

Which city has the most mechanical systems contractors?

Sao Paulo leads with 164 company records, followed by London (129) and Dubai (127).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 80,084 professional contacts with verified work emails tracked across these 19,797 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on October 18, 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 SmartSearch, 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.