Company lists · Data refreshed October 2026

Top 25 Commercial building energy system contractors worldwide

Name: Commercial building energy system contractors worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Oct 10, 2026 22,106 companies tracked

RevenueBase identified 22,106 company matches for commercial building energy system contractors worldwide as of October 2026 and tracks 354,187 professional contacts across them, including 98,466 with verified work emails. The United States is the largest market and London the largest hub.

This list covers company matches for commercial building energy system 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 10, 2026. Country and city lists for commercial building energy system 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 10, 2026 How this list was built

22,106Companies

354,187Contacts tracked

98,466Verified emails

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The 25 largest commercial building energy system contractors worldwide

Ranked by team size

Top 25 of 22,106 company matches for commercial building energy system contractors worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 10, 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	Johnson Controls	Exact match	Cork, IrelandHQ recorded Oct 10, 2026	10001+	54,046 contacts →
	Exact match “Johnson Controls is a global leader in thermal management, mission-critical building systems, energy efficiency and decarbonization.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
2	Equans Belux	Exact match	Brussels, BelgiumHQ recorded Oct 10, 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 10, 2026 · View company records in RevenueBase
3	Caverion	Exact match	Vantaa, FinlandHQ recorded Oct 10, 2026	10001+	4,548 contacts →
	Exact match “About Caverion Caverion is an expert for smart and sustainable built environments, enabling performance and people’s well-being.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
4	KENTZ	Exact match	Dubai, United Arab EmiratesHQ recorded Oct 10, 2026	10001+	4,217 contacts →
	Exact match “Following the acquisition of SNC-Lavalin's oil and gas division, Kentz has become a part of Kent.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
5	Enova By Veolia	Exact match	Dubai, United Arab EmiratesHQ recorded Oct 10, 2026	5,001-10,000	4,030 contacts →
	Exact match “Enova is the regional leader in integrated energy and multi-technical services, delivering comprehensive services to its clients.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
6	Southland Industries	Exact match	Garden Grove, CA, United StatesHQ recorded Oct 10, 2026	10001+	3,010 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 · Oct 10, 2026 · View company records in RevenueBase
7	FTI	Exact match	Menasha, WI, United StatesHQ recorded Oct 10, 2026	1,001-5,000	2,979 contacts →
	Exact match “Faith Technologies Incorporated (FTI) is a dynamic organization comprised of construction, engineering, manufacturing and renewable energy experts.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
8	Acco Engineered Systems	Exact match	Pasadena, CA, United StatesHQ recorded Oct 10, 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 10, 2026 · View company records in RevenueBase
9	Mckinstry	Exact match	Seattle, WA, United StatesHQ recorded Oct 10, 2026	1,001-5,000	2,293 contacts →
	Exact match “We're a national construction and energy services company dedicated to innovating the waste and climate harm out of the built environment.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
10	Modern Niagara	Exact match	Kanata, ON, CanadaHQ recorded Oct 10, 2026	1,001-5,000	1,585 contacts →
	Exact match “We build for life.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
11	Emcor Group, INC	Exact match	Norwalk, CT, United StatesHQ recorded Oct 10, 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 10, 2026 · View company records in RevenueBase
12	Macdonald-Miller Facility Solutions	Exact match	Seatac, WA, United StatesHQ recorded Oct 10, 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 10, 2026 · View company records in RevenueBase
13	Comfort Systems USA	Exact match	Houston, TX, United StatesHQ recorded Oct 10, 2026	10001+	1,354 contacts →
	Exact match “Comfort Systems USA \| Quality People.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
14	Bravida Danmark A S	Exact match	Brøndby, DenmarkHQ recorded Oct 10, 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 10, 2026 · View company records in RevenueBase
15	Facility Solutions Group	Exact match	Austin, TX, United StatesHQ recorded Oct 10, 2026	1,001-5,000	1,294 contacts →
	Exact match “Big jobs, complex systems, tight timelines.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
16	Aden Group	Exact match	SingaporeHQ recorded Oct 10, 2026	10001+	1,203 contacts →
	Exact match “Aden Group is a Euro-Asian enterprise delivering comprehensive solutions to boost decarbonization, productivity and energy transition in the built environment.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
17	GK	Exact match	Oslo, NorwayHQ recorded Oct 10, 2026	1,001-5,000	1,134 contacts →
	Exact match “GK er en ledende teknisk entreprenør og servicepartner.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
18	Dalkia UK	Exact match	London, United KingdomHQ recorded Oct 10, 2026	5,001-10,000	1,110 contacts →
	Exact match “Together, we’re delivering technical solutions for a better society and an Electric Britain Dalkia is one of the UK’s leading technical and energy services providers at the…” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
19	Henderson Engineers	Exact match	Lenexa, KS, United StatesHQ recorded Oct 10, 2026	501-1,000	1,096 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 · Oct 10, 2026 · View company records in RevenueBase
20	Plan Group INC	Exact match	Vaughan, ON, CanadaHQ recorded Oct 10, 2026	1,001-5,000	1,096 contacts →
	Exact match “Plan Group is a dynamic construction company that believes working together makes anything possible.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
21	Mckenney's, INC	Exact match	Atlanta, GA, United StatesHQ recorded Oct 10, 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 10, 2026 · View company records in RevenueBase
22	Cmta, INC	Exact match	Louisville, KY, United StatesHQ recorded Oct 10, 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 10, 2026 · View company records in RevenueBase
23	Proxiserve	Exact match	Levallois-perret, FranceHQ recorded Oct 10, 2026	1,001-5,000	984 contacts →
	Exact match “A major player in the energy transition and leader in home services, PROXISERVE provides its customers with innovative solutions enabling them to reduce their energy consumption…” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
24	Bravida Norge AS	Exact match	Oslo, NorwayHQ recorded Oct 10, 2026	1,001-5,000	898 contacts →
	Exact match “Bravida gir bygninger liv.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
25	Archkey Solutions	Exact match	St. Louis, MO, United StatesHQ recorded Oct 10, 2026	1,001-5,000	880 contacts →
	Exact match “ArchKey, one of the largest privately held specialty trade installation and facilities services companies in the United States, is a leader in designing, building, and maintaining…” Recorded in the RevenueBase company graph · Oct 10, 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 “commercial building energy system 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 22,106 commercial building energy system contractors worldwide

See the full list, filter by size, metro and specialty, and access 98,466 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Commercial building energy system contractors worldwide at a glance

As of Oct 10, 2026

27.8%Verified-email coverage

16.0Average contacts per company

11-50Median size (employees)

0.6%Largest-city concentration · London

Oct 10, 2026Page data refreshed

Companies by employee count

1-10

10,017

11-50

8,407

51-200

2,652

201-500

525

501-1,000

145

1,001-5,000

108

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 commercial building energy system contractors are linked below.
What qualifies: Company records worldwide whose business descriptions match “commercial building energy system 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 98,466 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 10, 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.

Commercial building energy system contractors by location

84 lists · largest first

Every Commercial building energy system 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 “commercial building energy system contractors”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many commercial building energy system contractors are there worldwide?

RevenueBase identified 22,106 company matches for commercial building energy system 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?

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

Which country has the most commercial building energy system contractors?

The United States leads with 4,819 companies, followed by Italy (1,431) and the United Kingdom (1,332). Every commercial building energy system contractors list by country and city is linked on this page.

Which city has the most commercial building energy system contractors?

London leads with 130 company records, followed by Sao Paulo (113) and New York (105).

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 98,466 professional contacts with verified work emails tracked across these 22,106 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 10, 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.