Company lists · Data refreshed September 2026

Top 25 Commercial energy consulting firms worldwide

Name: Commercial energy consulting firms worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 27, 2026 26,506 companies tracked

RevenueBase identified 26,506 commercial energy consulting firms worldwide as of September 2026 and tracks 441,074 professional contacts across them, including 134,660 with verified work emails. The United States is the largest market and London the largest hub.

This list covers commercial energy consulting firms 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 27, 2026. Country and city lists for commercial energy consulting firms 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 27, 2026 86% judged on-target in blind review

26,506Companies

441,074Contacts tracked

134,660Verified emails

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The 25 largest commercial energy consulting firms worldwide

Ranked by team size

Top 25 of 26,506 commercial energy consulting firms worldwide, ranked by team size, largest first. Data refreshed Sep 27, 2026. RevenueBase Smart Search rates how each company's information relates to commercial energy consulting firms: 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	Johnson Controls	Partial evidence	Cork, IrelandHQ checked Sep 27, 2026	10001+	52,736 contacts →
	Partial evidence “Johnson Controls is a global leader in thermal management, mission-critical building systems, energy efficiency and decarbonization.” Source: RevenueBase Database · checked Sep 27, 2026
2	Worley	Partial evidence	Sydney, AustraliaHQ checked Sep 27, 2026	10001+	34,763 contacts →
	Partial evidence “Worley is a global professional services company of energy, chemicals and resources experts headquartered in Australia.” Source: RevenueBase Database · checked Sep 27, 2026
3	WOOD	Strong evidence	Aberdeen, United KingdomHQ checked Sep 27, 2026	10001+	26,949 contacts →
	Strong evidence “Wood is a global leader in consulting and engineering, delivering critical solutions across energy and materials markets.” Source: RevenueBase Database · checked Sep 27, 2026
4	British GAS	Indirect evidence	Windsor, United KingdomHQ checked Sep 27, 2026	10001+	9,238 contacts →
	Indirect evidence “Taking care of things.” Source: RevenueBase Database · checked Sep 27, 2026
5	ERM	Indirect evidence	London, United KingdomHQ checked Sep 27, 2026	5,001-10,000	9,119 contacts →
	Indirect evidence “Sustainability is our business.” Source: RevenueBase Database · checked Sep 27, 2026
6	Dalkia	Indirect evidence	Saint-andré-lez-lille, FranceHQ checked Sep 27, 2026	10001+	8,427 contacts →
	Indirect evidence “Dalkia : ensemble, relevons le défi climatique!” Source: RevenueBase Database · checked Sep 27, 2026
7	Equans Belux	Indirect evidence	Brussels, BelgiumHQ checked Sep 27, 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 27, 2026
8	Enova By Veolia	Partial evidence	Dubai, United Arab EmiratesHQ checked Sep 27, 2026	5,001-10,000	4,058 contacts →
	Partial evidence “Enova is the regional leader in integrated energy and multi-technical services, delivering comprehensive services to its clients.” Source: RevenueBase Database · checked Sep 27, 2026
9	KENTZ	Indirect evidence	Dubai, United Arab EmiratesHQ checked Sep 27, 2026	10001+	3,987 contacts →
	Indirect evidence “Following the acquisition of SNC-Lavalin's oil and gas division, Kentz has become a part of Kent.” Source: RevenueBase Database · checked Sep 27, 2026
10	Ortec Group	Indirect evidence	Aix-en-provence, FranceHQ checked Sep 27, 2026	10001+	3,436 contacts →
	Indirect evidence “En conjuguant depuis sa création audace et rigueur, le groupe Ortec est devenu aujourd’hui un des leaders des services à l’industrie, l’énergie et l’environnement.” Source: RevenueBase Database · checked Sep 27, 2026
11	FTI	Partial evidence	Menasha, WI, United StatesHQ checked Sep 27, 2026	1,001-5,000	2,741 contacts →
	Partial evidence “Faith Technologies Incorporated (FTI) is a dynamic organization comprised of construction, engineering, manufacturing and renewable energy experts.” Source: RevenueBase Database · checked Sep 27, 2026
12	Shell Energy	Partial evidence	London, United KingdomHQ checked Sep 27, 2026	1,001-5,000	2,627 contacts →
	Partial evidence “We help businesses manage energy needs, boost efficiency, control costs and achieve decarbonisation goals for a better energy future.” Source: RevenueBase Database · checked Sep 27, 2026
13	Southland Industries	Partial evidence	Garden Grove, CA, United StatesHQ checked Sep 27, 2026	10001+	2,439 contacts →
	Partial evidence “As one of the nation's largest building systems experts, Southland Industries provides innovative, practical results for your engineering, construction, service, and energy needs.” Source: RevenueBase Database · checked Sep 27, 2026
14	Mckinstry	Partial evidence	Seattle, WA, United StatesHQ checked Sep 27, 2026	1,001-5,000	2,213 contacts →
	Partial evidence “We're a national construction and energy services company dedicated to innovating the waste and climate harm out of the built environment.” Source: RevenueBase Database · checked Sep 27, 2026
15	Clearesult	Partial evidence	Austin, TX, United StatesHQ checked Sep 27, 2026	1,001-5,000	2,121 contacts →
	Partial evidence “CLEAResult is the largest provider of energy efficiency, energy transition and energy sustainability services in North America.” Source: RevenueBase Database · checked Sep 27, 2026
16	Engie Services Nederland NV	Indirect evidence	Bunnik, NetherlandsHQ checked Sep 27, 2026	5,001-10,000	2,021 contacts →
	Indirect evidence “EQUANS is de nieuwe naam van ENGIE Services in Nederland.” Source: RevenueBase Database · checked Sep 27, 2026
17	Vulcain Engineering Group	Strong evidence	Neuilly-sur-seine, FranceHQ checked Sep 27, 2026	5,001-10,000	1,496 contacts →
	Strong evidence “Vulcain Engineering Group is a multi-specialist engineering and consulting group serving industrial companies across the globe, focused on critical sectors: energy, health…” Source: RevenueBase Database · checked Sep 27, 2026
18	Ameresco	Partial evidence	Framingham, MA, United StatesHQ checked Sep 27, 2026	1,001-5,000	1,383 contacts →
	Partial evidence “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…” Source: RevenueBase Database · checked Sep 27, 2026
19	GK	Indirect evidence	Oslo, NorwayHQ checked Sep 27, 2026	1,001-5,000	1,150 contacts →
	Indirect evidence “GK er en ledende teknisk entreprenør og servicepartner.” Source: RevenueBase Database · checked Sep 27, 2026
20	OLA	Strong evidence	Austin, TX, United StatesHQ checked Sep 27, 2026	n/a	1,145 contacts →
	Strong evidence “OLA Sustainability, LLC OLA Sustainability is a consulting firm that focuses on integrating sustainable practices into commercial and multifamily design projects.” Source: RevenueBase Database · checked Sep 27, 2026
21	Aden Group	Partial evidence	SingaporeHQ checked Sep 27, 2026	10001+	1,105 contacts →
	Partial evidence “Aden Group is a Euro-Asian enterprise delivering comprehensive solutions to boost decarbonization, productivity and energy transition in the built environment.” Source: RevenueBase Database · checked Sep 27, 2026
22	Hoare LEA	Indirect evidence	London, United KingdomHQ checked Sep 27, 2026	501-1,000	1,103 contacts →
	Indirect evidence “We are an award-winning engineering consultancy with a creative team of engineers, designers, and technical specialists.” Source: RevenueBase Database · checked Sep 27, 2026
23	BTP Consultants	Indirect evidence	Montigny-le-bretonneux, FranceHQ checked Sep 27, 2026	201-500	1,066 contacts →
	Indirect evidence “BTP Consultants est un bureau de ̂, et présent à l'échelle nationale depuis plus de.” Source: RevenueBase Database · checked Sep 27, 2026
24	Dalkia UK	Partial evidence	London, United KingdomHQ checked Sep 27, 2026	5,001-10,000	1,064 contacts →
	Partial evidence “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…” Source: RevenueBase Database · checked Sep 27, 2026
25	Granlund	Indirect evidence	Helsinki, FinlandHQ checked Sep 27, 2026	1,001-5,000	1,027 contacts →
	Indirect evidence “Granlund on voimakkaasti kasvava kiinteistö- ja rakennusalan asiantuntijayhtiö.” Source: RevenueBase Database · checked Sep 27, 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: commercial energy consulting firms. 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 commercial energy consulting firms.
Partial evidence: Its own public description names part of commercial energy consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name commercial energy consulting firms. 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 26,506 commercial energy consulting firms worldwide

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Commercial energy consulting firms worldwide at a glance

As of Sep 27, 2026

30.5%Verified-email coverage

16.6Average contacts per company

1-10Median size (employees)

1.2%Largest-city concentration · London

Sep 27, 2026Page data refreshed

Companies by employee count

1-10

16,315

11-50

7,656

51-200

1,805

201-500

341

501-1,000

103

1,001-5,000

102

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 commercial energy consulting firms, 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 commercial energy consulting firms are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “commercial energy consulting firms”. 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 commercial energy consulting firms), 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 commercial energy consulting firms, 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, 134,660 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 27, 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.

Commercial energy consulting firms by location

105 lists · largest first

Every Commercial energy consulting 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 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 commercial energy consulting firms, 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 commercial energy consulting firms are there worldwide?

RevenueBase identified 26,506 commercial energy consulting firms 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?

Johnson Controls, headquartered in Milwaukee, tops this list with the largest team on record.

Which country has the most commercial energy consulting firms?

The United States leads with 4,015 companies, followed by France (1,934) and the United Kingdom (1,689). Every commercial energy consulting firms list by country and city is linked on this page.

Which city has the most commercial energy consulting firms?

London leads with 307 headquartered companies, followed by Madrid (267) and Paris (248).

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 134,660 verified decision-maker contacts tracked across these 26,506 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 27, 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.