Company lists · Data refreshed September 2026

Top 25 Mechanical systems integrators worldwide

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

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 27,004 companies tracked

RevenueBase identified 27,004 company matches for mechanical systems integrators worldwide as of September 2026 and tracks 423,849 professional contacts across them, including 135,184 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 integrators 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 September 28, 2026. Country and city lists for mechanical systems integrators 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 Sep 28, 2026 How this list was built

27,004Companies

423,849Contacts tracked

135,184Verified emails

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The 25 largest mechanical systems integrators worldwide

Ranked by team size

Top 25 of 27,004 company matches for mechanical systems integrators worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 28, 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	Convergint	Exact match	Hoffman Estates, IL, United StatesHQ recorded Sep 28, 2026	10001+	5,707 contacts →
	Exact match “Convergint is a global systems integrator focused on delivering results for our customers through unparalleled service excellence.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
2	Equans	Exact match	Courbevoie, FranceHQ recorded Sep 28, 2026	10001+	5,064 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 · Sep 28, 2026 · View company records in RevenueBase
3	Toyo Engineering Corporation	Exact match	Chiba-shi Mihama-ku, JapanHQ recorded Sep 28, 2026	1,001-5,000	2,760 contacts →
	Exact match “Toyo Engineering is an engineering company that constructs the plant in a global stage centering on the plant engineering field.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
4	ATS Corporation	Exact match	Cambridge, ON, CanadaHQ recorded Sep 28, 2026	5,001-10,000	2,754 contacts →
	Exact match “HELPING ADVANCE THE FUTURE ATS Corporation is an industry-leading automation solutions provider to many of the world's most successful companies.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
5	Croonwolter&dros	Exact match	Rotterdam, NetherlandsHQ recorded Sep 28, 2026	1,001-5,000	2,515 contacts →
	Exact match “For more than 140 years Croonwolter & dros has been in the vanguard of new developments.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
6	Southland Industries	Exact match	Garden Grove, CA, United StatesHQ recorded Sep 28, 2026	10001+	2,439 contacts →
	Exact match “As one of the nation's largest building systems experts, Southland Industries provides innovative, practical results for your engineering, construction, service, and energy needs.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
7	Acco Engineered Systems	Exact match	Pasadena, CA, United StatesHQ recorded Sep 28, 2026	5,001-10,000	2,415 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 · Sep 28, 2026 · View company records in RevenueBase
8	Montcalm Montagens Industriais	Exact match	São Paulo, BrazilHQ recorded Sep 28, 2026	1,001-5,000	2,088 contacts →
	Exact match “Fundada em 1971, a Montcalm tem como missão, oferecer soluções de engenharia construtiva para implantação, ampliação e manutenção de indústrias de processos, sempre com o…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
9	firstfix.ksa	Exact match	Jeddah, Saudi ArabiaHQ recorded Sep 28, 2026	5,001-10,000	1,896 contacts →
	Exact match “First Fix is a local market dealer delivering world class projects via end to end solutions that provide integrated design, engineering and construction disciplines of mechanical…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
10	Yokogawa India Limited	Exact match	Bangalore, IndiaHQ recorded Sep 28, 2026	1,001-5,000	1,803 contacts →
	Exact match “Yokogawa India Limited, incorporated in 1987, is an affiliate of Yokogawa Electric Corporation, Japan, having strong marketing and service network across India.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
11	Icad-Ksa	Exact match	Jeddah, Saudi ArabiaHQ recorded Sep 28, 2026	1,001-5,000	1,644 contacts →
	Exact match “ICAD-KSA is a Master Systems Integrator supporting Saudi Arabia’s giga and mega projects under Vision 2030.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
12	Modern Niagara	Exact match	Kanata, ON, CanadaHQ recorded Sep 28, 2026	1,001-5,000	1,556 contacts →
	Exact match “We build for life.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
13	GRAY	Exact match	Lexington, KY, United StatesHQ recorded Sep 28, 2026	1,001-5,000	1,477 contacts →
	Exact match “Founded by James Norris and Lois Howard Gray in 1960, Gray is a family-owned, fully integrated industrial design-builder specializing in engineering, architecture, construction…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
14	Emcor Group, INC	Exact match	Norwalk, CT, United StatesHQ recorded Sep 28, 2026	10001+	1,383 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 · Sep 28, 2026 · View company records in RevenueBase
15	Comfort Systems USA	Exact match	Houston, TX, United StatesHQ recorded Sep 28, 2026	10001+	1,330 contacts →
	Exact match “Comfort Systems USA \| Quality People.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
16	Macdonald-Miller Facility Solutions	Exact match	Seatac, WA, United StatesHQ recorded Sep 28, 2026	1,001-5,000	1,303 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 · Sep 28, 2026 · View company records in RevenueBase
17	Bravida Danmark A S	Exact match	Brøndby, DenmarkHQ recorded Sep 28, 2026	1,001-5,000	1,298 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 · Sep 28, 2026 · View company records in RevenueBase
18	Tkil Industries	Exact match	Pune, IndiaHQ recorded Sep 28, 2026	1,001-5,000	1,296 contacts →
	Exact match “TKIL Industries Pvt.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
19	Aaon, INC	Exact match	Tulsa, OK, United StatesHQ recorded Sep 28, 2026	1,001-5,000	1,208 contacts →
	Exact match “Driving the industry forward through the design, manufacturing, and rigorous testing of premium HVAC equipment.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
20	Englobal	Exact match	Houston, TX, United StatesHQ recorded Sep 28, 2026	201-500	1,183 contacts →
	Exact match “Who We Are Englobal Founded in 1985, ENGlobal (NASDAQ: ENG) is a specialty engineering services firm that focuses on automation solutions and select EPCM projects for the energy…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
21	Rovisys	Exact match	Aurora, OH, United StatesHQ recorded Sep 28, 2026	1,001-5,000	1,159 contacts →
	Exact match “As one of the world's largest independent systems integrators, RoviSys delivers comprehensive automation, digital transformation, manufacturing execution (MES), Industrial AI…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
22	Plan Group INC	Exact match	Vaughan, ON, CanadaHQ recorded Sep 28, 2026	1,001-5,000	1,092 contacts →
	Exact match “Plan Group is a dynamic construction company that believes working together makes anything possible.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
23	Mckenney's, INC	Exact match	Atlanta, GA, United StatesHQ recorded Sep 28, 2026	1,001-5,000	1,077 contacts →
	Exact match “McKenney’s is the Southeast’s most trusted name in facility construction, operation and maintenance.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
24	Henderson Engineers	Exact match	Lenexa, KS, United StatesHQ recorded Sep 28, 2026	501-1,000	1,040 contacts →
	Exact match “Henderson Engineers is a national building systems design firm with a wide array of engineering services and a portfolio representing a full range of markets including business…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
25	Harris	Exact match	St Paul, MN, United StatesHQ recorded Sep 28, 2026	1,001-5,000	982 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 · Sep 28, 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 integrators”. 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 27,004 mechanical systems integrators worldwide

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Mechanical systems integrators worldwide at a glance

As of Sep 28, 2026

31.9%Verified-email coverage

15.7Average contacts per company

11-50Median size (employees)

0.9%Largest-city concentration · Sao Paulo

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

10,198

11-50

10,928

51-200

4,311

201-500

946

501-1,000

262

1,001-5,000

148

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 integrators are linked below.
What qualifies: Company records worldwide whose business descriptions match “mechanical systems integrators” 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 135,184 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 September 28, 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 integrators by location

107 lists · largest first

Every Mechanical systems integrators 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 integrators”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many mechanical systems integrators are there worldwide?

RevenueBase identified 27,004 company matches for mechanical systems integrators worldwide as of September 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?

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

Which country has the most mechanical systems integrators?

The United States leads with 5,940 companies, followed by Italy (1,802) and the United Kingdom (1,302). Every mechanical systems integrators list by country and city is linked on this page.

Which city has the most mechanical systems integrators?

Sao Paulo leads with 236 company records, followed by Istanbul (218) and Pune (168).

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 135,184 professional contacts with verified work emails tracked across these 27,004 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 September 28, 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.