Company lists · Data refreshed September 2026

Top 25 Energy systems integration firms worldwide

Name: Energy systems integration firms worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 26,672 companies tracked

RevenueBase identified 26,672 company matches for energy systems integration firms worldwide as of September 2026 and tracks 431,617 professional contacts across them, including 130,906 with verified work emails. The United States is the largest market and London the largest hub.

This list covers company matches for energy systems integration firms 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 energy systems integration firms 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

26,672Companies

431,617Contacts tracked

130,906Verified emails

Explore this list → Free signup · no credit card · 500 free credits

The 25 largest energy systems integration firms worldwide

Ranked by team size

Top 25 of 26,672 company matches for energy systems integration firms 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	Johnson Controls	Exact match	Cork, IrelandHQ recorded Sep 28, 2026	10001+	52,736 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 · Sep 28, 2026 · View company records in RevenueBase
2	Atkinsréalis	Exact match	Montreal, QC, CanadaHQ recorded Sep 28, 2026	10001+	22,733 contacts →
	Exact match “We are a world-class engineering services and nuclear organization.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
3	Atkins	Exact match	Epsom, United KingdomHQ recorded Sep 28, 2026	10001+	9,297 contacts →
	Exact match “Atkins is now AtkinsRéalis.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
4	KENT	Exact match	Dubai, United Arab EmiratesHQ recorded Sep 28, 2026	10001+	7,045 contacts →
	Exact match “We design, build and maintain the assets that power the world for today and make it future-ready for tomorrow.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
5	Sargent & Lundy	Exact match	Chicago, WY, United StatesHQ recorded Sep 28, 2026	1,001-5,000	4,156 contacts →
	Exact match “Sargent & Lundy is one of the world’s longest-standing full-service architect engineering firms.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
6	Enova By Veolia	Exact match	Dubai, United Arab EmiratesHQ recorded Sep 28, 2026	5,001-10,000	4,058 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 · Sep 28, 2026 · View company records in RevenueBase
7	M.C. Dean, INC	Exact match	Tysons, VA, United StatesHQ recorded Sep 28, 2026	5,001-10,000	2,761 contacts →
	Exact match “M.C.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
8	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
9	FTI	Exact match	Menasha, WI, United StatesHQ recorded Sep 28, 2026	1,001-5,000	2,741 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 · Sep 28, 2026 · View company records in RevenueBase
10	Tata Power Renewable Energy Limited	Exact match	Mumbai, IndiaHQ recorded Sep 28, 2026	501-1,000	2,660 contacts →
	Exact match “Tata Power Renewable Energy Limited (TPREL) is one of India’s leading renewable energy companies, driving the transition towards a cleaner, more resilient and sustainable energy…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
11	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
12	Innio Group	Exact match	Munich, GermanyHQ recorded Sep 28, 2026	1,001-5,000	2,111 contacts →
	Exact match “INNIO Group is a global distributed energy solutions provider that delivers reliable, flexible, transient, decentralized, modular and efficient power.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
13	Omexom	Exact match	Nanterre, FranceHQ recorded Sep 28, 2026	5,001-10,000	1,903 contacts →
	Exact match “With today's global energy sector undergoing constant change, Omexom works with its clients in delivering on the promises of the energy transition.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
14	Enercon Services, INC	Exact match	Kennesaw, GA, United StatesHQ recorded Sep 28, 2026	1,001-5,000	1,865 contacts →
	Exact match “ENERCON is a multi-discipline engineering and environmental engineering support services firm focused on delivering safe and efficient solutions for the power, data center and…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
15	Fluence	Exact match	Arlington, VA, United StatesHQ recorded Sep 28, 2026	1,001-5,000	1,863 contacts →
	Exact match “To achieve our mission, we design, deploy, and operate the world’s most advanced modular energy storage products, comprehensive lifecycle services, and AI-enabled asset management…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
16	Mitsubishi Power Americas	Exact match	Lake Mary, FL, United StatesHQ recorded Sep 28, 2026	1,001-5,000	1,859 contacts →
	Exact match “Mitsubishi Power Americas is creating a future that works for people and the planet through innovative power generation technology and solutions.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
17	Elsewedy Electric Power Systems Projects	Exact match	Cairo, EgyptHQ recorded Sep 28, 2026	1,001-5,000	1,396 contacts →
	Exact match “An integrated energy solutions -design and build- provider specialized in Power Generation, Water Treatment and Hydropower while currently diversifying our business segments to…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
18	Ameresco	Exact match	Framingham, MA, United StatesHQ recorded Sep 28, 2026	1,001-5,000	1,383 contacts →
	Exact match “Ameresco, Inc.(NYSE:AMRC) is a leading energy infrastructure solutions provider dedicated to helping customers reduce costs, enhance resilience, and decarbonize to net zero in the…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
19	Solv Energy	Exact match	San Diego, CA, United StatesHQ recorded Sep 28, 2026	1,001-5,000	1,286 contacts →
	Exact match “SOLV Energy is a renewable energy solutions provider for utility solar, energy storage, and high voltage projects in North America.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
20	Site SPA	Exact match	Bologna, ItalyHQ recorded Sep 28, 2026	1,001-5,000	1,221 contacts →
	Exact match “SITE fornisce servizi di System Integration, nella realizzazione di infrastrutture e impianti tecnologici.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
21	Dalkia UK	Exact match	London, United KingdomHQ recorded Sep 28, 2026	5,001-10,000	1,064 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 · Sep 28, 2026 · View company records in RevenueBase
22	Clarke Energy	Exact match	Liverpool, United KingdomHQ recorded Sep 28, 2026	1,001-5,000	1,049 contacts →
	Exact match “Clarke Energy, a Rehlko company, specialises in energy efficient, low carbon and flexible energy systems.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
23	Ormazabal	Exact match	Derio, SpainHQ recorded Sep 28, 2026	1,001-5,000	1,014 contacts →
	Exact match “We are experts in customized and high-tech electrical solutions for your challenges At Ormazabal we design and manufacture solutions aimed at digitalizing the electrical grid to…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
24	Wärtsilä Energy	Exact match	Helsinki, FinlandHQ recorded Sep 28, 2026	10001+	940 contacts →
	Exact match “Wärtsilä leads the transition towards a 100% renewable energy future.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
25	Prime Controls	Exact match	Lewisville, TX, United StatesHQ recorded Sep 28, 2026	1,001-5,000	857 contacts →
	Exact match “Prime Controls was established as a Main Automation Contractor to provide customers a sole source solution for Industrial Automation services and products.” 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 “energy systems integration firms”. 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 26,672 energy systems integration firms worldwide

See the full list, filter by size, metro and specialty, and access 130,906 tracked professional contacts with verified work emails. Direct dials are available where recorded.

Free signup · no credit card

View the full list →

Energy systems integration firms worldwide at a glance

As of Sep 28, 2026

30.3%Verified-email coverage

16.2Average contacts per company

1-10Median size (employees)

0.6%Largest-city concentration · London

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

13,333

11-50

9,515

51-200

2,686

201-500

580

501-1,000

174

1,001-5,000

141

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 energy systems integration firms are linked below.
What qualifies: Company records worldwide whose business descriptions match “energy systems integration firms” 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 130,906 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.

Energy systems integration firms by location

109 lists · largest first

Every Energy systems integration firms 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 “energy systems integration firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many energy systems integration firms are there worldwide?

RevenueBase identified 26,672 company matches for energy systems integration firms 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?

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

Which country has the most energy systems integration firms?

The United States leads with 4,517 companies, followed by Italy (1,790) and Germany (1,632). Every energy systems integration firms list by country and city is linked on this page.

Which city has the most energy systems integration firms?

London leads with 165 company records, followed by Sao Paulo (150) and Madrid (117).

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 130,906 professional contacts with verified work emails tracked across these 26,672 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.

Ready to reach these companies? Verified emails and direct dials for all 26,672 energy systems integration firms worldwide. Start with a free account, no credit card.

Download this list →

Related lists

Browse the directory

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.