Company lists · Data refreshed September 2026

Top 25 Energy technology consulting firms worldwide

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

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 28,828 companies tracked

RevenueBase identified 28,828 energy technology consulting firms worldwide as of September 2026 and tracks 630,949 professional contacts across them, including 200,505 with verified work emails. The United States is the largest market and Madrid the largest hub.

This list covers energy technology 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 21, 2026. Country and city lists for energy technology 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 21, 2026 86% judged on-target in blind review

28,828Companies

630,949Contacts tracked

200,505Verified emails

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The 25 largest energy technology consulting firms worldwide

Ranked by team size

Top 25 of 28,828 energy technology consulting firms worldwide, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to energy technology 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	Siemens Energy	Strong evidence	Munich, GermanyHQ checked Sep 21, 2026	10001+	46,587 contacts →
	Strong evidence “Siemens Energy is one of the world’s leading energy technology companies.” Source: RevenueBase Database · checked Sep 21, 2026
2	Worley	Partial evidence	Sydney, AustraliaHQ checked Sep 21, 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 21, 2026
3	WOOD	Strong evidence	Aberdeen, United KingdomHQ checked Sep 21, 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 21, 2026
4	Technipfmc	Strong evidence	Newcastle Upon Tyne, United KingdomHQ checked Sep 21, 2026	10001+	19,907 contacts →
	Strong evidence “TechnipFMC is a leading technology provider to the traditional and new energies industry, delivering fully integrated projects, products, and services.” Source: RevenueBase Database · checked Sep 21, 2026
5	TRANE	Strong evidence	Davidson, NC, United StatesHQ checked Sep 21, 2026	10001+	10,272 contacts →
	Strong evidence “Trane is the building technology and energy solutions leader who deploys a depth and breadth of expertise, backgrounds, and perspectives to innovate new technologies and…” Source: RevenueBase Database · checked Sep 21, 2026
6	British GAS	Indirect evidence	Windsor, United KingdomHQ checked Sep 21, 2026	10001+	9,238 contacts →
	Indirect evidence “Taking care of things.” Source: RevenueBase Database · checked Sep 21, 2026
7	DTE Energy	Partial evidence	Detroit, MI, United StatesHQ checked Sep 21, 2026	10001+	9,087 contacts →
	Partial evidence “DTE is one of the largest Fortune 500 diversified energy companies, proudly serving Michigan for over a century.” Source: RevenueBase Database · checked Sep 21, 2026
8	Vinci Energies	Partial evidence	Nanterre, FranceHQ checked Sep 21, 2026	10001+	8,598 contacts →
	Partial evidence “In a world undergoing constant change, VINCI Energies contributes to the environmental transition by helping bring about major trends in the digital landscape and energy sector.” Source: RevenueBase Database · checked Sep 21, 2026
9	Dalkia	Indirect evidence	Saint-andré-lez-lille, FranceHQ checked Sep 21, 2026	10001+	8,427 contacts →
	Indirect evidence “Dalkia : ensemble, relevons le défi climatique!” Source: RevenueBase Database · checked Sep 21, 2026
10	KENT	Indirect evidence	Dubai, United Arab EmiratesHQ checked Sep 21, 2026	10001+	7,045 contacts →
	Indirect evidence “We design, build and maintain the assets that power the world for today and make it future-ready for tomorrow.” Source: RevenueBase Database · checked Sep 21, 2026
11	Assystem	Partial evidence	Courbevoie, FranceHQ checked Sep 21, 2026	5,001-10,000	6,518 contacts →
	Partial evidence “Assystem, one of the world's leading independent nuclear engineering companies, is committed to accelerating the energy transition.” Source: RevenueBase Database · checked Sep 21, 2026
12	The AES Corporation	Partial evidence	Arlington, VA, United StatesHQ checked Sep 21, 2026	5,001-10,000	5,387 contacts →
	Partial evidence “The world no longer thinks of energy as a matter of supply and demand.” Source: RevenueBase Database · checked Sep 21, 2026
13	Mortenson	Partial evidence	Minneapolis, MN, United StatesHQ checked Sep 21, 2026	5,001-10,000	5,298 contacts →
	Partial evidence “Mortenson is a U.S-based, top-25 builder, developer and provider of energy and engineering services committed to helping organizations move their strategies forward.” Source: RevenueBase Database · checked Sep 21, 2026
14	Centrica	Partial evidence	Windsor, United KingdomHQ checked Sep 21, 2026	10001+	4,555 contacts →
	Partial evidence “Centrica is an international energy services and solutions company, founded on a 200-year heritage of serving customers in homes and businesses.” Source: RevenueBase Database · checked Sep 21, 2026
15	Landis GYR	Strong evidence	Cham, SwitzerlandHQ checked Sep 21, 2026	5,001-10,000	4,252 contacts →
	Strong evidence “Landis+Gyr is a global energy technology leader delivering intelligent solutions that connect devices, data, and decisions across the grid.” Source: RevenueBase Database · checked Sep 21, 2026
16	Sargent & Lundy	Indirect evidence	Chicago, WY, United StatesHQ checked Sep 21, 2026	1,001-5,000	4,156 contacts →
	Indirect evidence “Sargent & Lundy is one of the world’s longest-standing full-service architect engineering firms.” Source: RevenueBase Database · checked Sep 21, 2026
17	Hubbell Incorporated	Partial evidence	Shelton, CT, United StatesHQ checked Sep 21, 2026	10001+	4,053 contacts →
	Partial evidence “Hubbell Incorporated is a leading manufacturer of utility and electrical solutions that help build more reliable, resilient, and renewable energy infrastructure.” Source: RevenueBase Database · checked Sep 21, 2026
18	Octopus Energy	Partial evidence	London, United KingdomHQ checked Sep 21, 2026	1,001-5,000	3,989 contacts →
	Partial evidence “We're on a mission to make a big green dent in the universe by building a truly sustainable energy system globally.” Source: RevenueBase Database · checked Sep 21, 2026
19	Generac	Partial evidence	Waukesha, WI, United StatesHQ checked Sep 21, 2026	5,001-10,000	3,797 contacts →
	Partial evidence “Generac is the total energy solutions company powering a smarter world.” Source: RevenueBase Database · checked Sep 21, 2026
20	Entrust Solutions Group	Partial evidence	Lisle, IL, United StatesHQ checked Sep 21, 2026	1,001-5,000	2,966 contacts →
	Partial evidence “ENTRUST Solutions Group, an ENR Top 100 company, provides comprehensive and dependable engineering, consulting, and automation services to pipeline companies, gas and electric…” Source: RevenueBase Database · checked Sep 21, 2026
21	FTI	Strong evidence	Menasha, WI, United StatesHQ checked Sep 21, 2026	1,001-5,000	2,741 contacts →
	Strong evidence “Faith Technologies Incorporated (FTI) is a dynamic organization comprised of construction, engineering, manufacturing and renewable energy experts.” Source: RevenueBase Database · checked Sep 21, 2026
22	Shell Energy	Partial evidence	London, United KingdomHQ checked Sep 21, 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 21, 2026
23	Ingeteam	Indirect evidence	Zamudio, SpainHQ checked Sep 21, 2026	1,001-5,000	2,574 contacts →
	Indirect evidence “Ingeteam is made up of a team of more than 3,500 people in 15 countries, with more than 80 years of experience providing creative solutions to specific problems to electrify…” Source: RevenueBase Database · checked Sep 21, 2026
24	Equans Nederland	Indirect evidence	Bunnik, NetherlandsHQ checked Sep 21, 2026	5,001-10,000	2,457 contacts →
	Indirect evidence “Bij Equans combineren we technische expertise met digitale innovatie voor klanten in de industrie, utiliteit en infrastructuur.” Source: RevenueBase Database · checked Sep 21, 2026
25	SICIM	Partial evidence	Busseto, ItalyHQ checked Sep 21, 2026	10001+	2,404 contacts →
	Partial evidence “SICIM is a leading Worldwide EPC Contractor since 1962, offering all kinds of services related to the production, treatment and transportation of traditional energy sources and…” Source: RevenueBase Database · checked Sep 21, 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: energy technology 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 energy technology consulting firms.
Partial evidence: Its own public description names part of energy technology consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name energy technology 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 28,828 energy technology consulting firms worldwide

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Energy technology consulting firms worldwide at a glance

As of Sep 21, 2026

31.8%Verified-email coverage

21.9Average contacts per company

1-10Median size (employees)

1.0%Largest-city concentration · Madrid

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

16,563

11-50

8,732

51-200

2,373

201-500

561

501-1,000

195

1,001-5,000

204

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 energy technology 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 energy technology consulting firms are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “energy technology 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 energy technology 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 energy technology 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, 200,505 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 21, 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.

Energy technology consulting firms by location

118 lists · largest first

Every Energy technology 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 energy technology 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 energy technology consulting firms are there worldwide?

RevenueBase identified 28,828 energy technology 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?

Siemens Energy, headquartered in Munich, tops this list with the largest team on record.

Which country has the most energy technology consulting firms?

The United States leads with 3,917 companies, followed by Brazil (1,851) and Germany (1,788). Every energy technology consulting firms list by country and city is linked on this page.

Which city has the most energy technology consulting firms?

Madrid leads with 297 headquartered companies, followed by London (294) and Houston (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 200,505 verified decision-maker contacts tracked across these 28,828 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 21, 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.