Company lists · Data refreshed October 2026

Top 25 Clean energy policy consultants worldwide

Name: Clean energy policy consultants worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Oct 9, 2026 14,312 companies tracked

RevenueBase identified 14,312 company matches for clean energy policy consultants worldwide as of October 2026 and tracks 130,141 professional contacts across them, including 41,104 with verified work emails. The United States is the largest market and London the largest hub.

This list covers company matches for clean energy policy consultants 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 9, 2026. Country and city lists for clean energy policy consultants 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 9, 2026 How this list was built

14,312Companies

130,141Contacts tracked

41,104Verified emails

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The 25 largest clean energy policy consultants worldwide

Ranked by team size

Top 25 of 14,312 company matches for clean energy policy consultants worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 9, 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	ERM	Exact match	London, United KingdomHQ recorded Oct 9, 2026	5,001-10,000	9,532 contacts →
	Exact match “Sustainability is our business.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
2	Swca Environmental Consultants	Exact match	Phoenix, AZ, United StatesHQ recorded Oct 9, 2026	1,001-5,000	1,661 contacts →
	Exact match “Founded on a commitment to sound science and creative solutions, SWCA is a leader in environmental and management consulting services.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
3	Fichtner	Exact match	Stuttgart, GermanyHQ recorded Oct 9, 2026	1,001-5,000	1,349 contacts →
	Exact match “As a leading, independent engineering and consultancy enterprise active in the sectors of energy and infrastructure, Fichtner handles challenging projects in countries all over…” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
4	Willdan	Exact match	Anaheim, CA, United StatesHQ recorded Oct 9, 2026	1,001-5,000	872 contacts →
	Exact match “Willdan (NASDAQ: WLDN) provides professional consulting and technical services to utilities, public agencies and private industry throughout the United States.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
5	Inerco	Exact match	Seville, SpainHQ recorded Oct 9, 2026	1,001-5,000	735 contacts →
	Exact match “INERCO is a multinational technology company specialising in sustainability.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
6	Environmental Science Associates	Exact match	San Francisco, CA, United StatesHQ recorded Oct 9, 2026	501-1,000	730 contacts →
	Exact match “ESA is a 100% employee-owned environmental consulting firm.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
7	WTS Energy	Exact match	The Hague, NetherlandsHQ recorded Oct 9, 2026	1,001-5,000	654 contacts →
	Exact match “The Energy Transition brings new challenges and opportunities to all of us.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
8	E CO	Exact match	London, United KingdomHQ recorded Oct 9, 2026	n/a	639 contacts →
	Exact match “For over 26 years, our consultants have been supporting and guiding our clients to achieve low-carbon climate-resilient development.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
9	Ricardo PLC	Exact match	London, United KingdomHQ recorded Oct 9, 2026	1,001-5,000	627 contacts →
	Exact match “Click the 'Follow' button and explore careers at Ricardo on our 'Jobs' and 'Life' tabs and at careers.ricardo.com.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
10	Revergy	Exact match	Seville, SpainHQ recorded Oct 9, 2026	501-1,000	538 contacts →
	Exact match “REVERGY nace mediante un proyecto de profesionales procedentes de diferentes ámbitos del sector de las energías renovables con el fin de presentar un proyecto marcado por la…” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
11	Kapsarc	Exact match	Riyadh, Saudi ArabiaHQ recorded Oct 9, 2026	51-200	518 contacts →
	Exact match “King Abdullah Petroleum Studies and Research Center (KAPSARC) is an advisory think tank within global energy economics and sustainability providing services to entities and…” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
12	Natural Power	Exact match	Castle Douglas, United KingdomHQ recorded Oct 9, 2026	501-1,000	517 contacts →
	Exact match “Natural Power is a leading independent consultancy and service provider for the renewable energy sector.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
13	Groundwater & Environmental Services, INC	Exact match	Wall Township, NJ, United StatesHQ recorded Oct 9, 2026	201-500	462 contacts →
	Exact match “We are Groundwater & Environmental Services, Inc, better known as GES.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
14	Sete Soluções E Tecnologia Ambiental	Exact match	Belo Horizonte, BrazilHQ recorded Oct 9, 2026	501-1,000	455 contacts →
	Exact match “Somos uma das maiores consultorias em meio ambiente do Brasil, fundada em 1997, contando, hoje, com uma equipe técnica multidisciplinar permanente, que congrega profissionais das…” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
15	Synergy Consulting, INC	Exact match	Washington, DC, United StatesHQ recorded Oct 9, 2026	51-200	433 contacts →
	Exact match “Synergy Consulting is Global Leader in Financial and Corporate Advisory.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
16	Gestiona Consultores	Exact match	Santiago, ChileHQ recorded Oct 9, 2026	201-500	428 contacts →
	Exact match “Somos un equipo consolidado y multidisciplinario de profesionales con amplia experiencia en la gestión para el cumplimiento normativo de proyectos de inversión.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
17	Fichtner Consulting Engineers LTD	Exact match	Stockport, United KingdomHQ recorded Oct 9, 2026	51-200	427 contacts →
	Exact match “Fichtner is one of the world's leading independent engineering consultancy firms.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
18	TRIO	Exact match	Irvine, CA, United StatesHQ recorded Oct 9, 2026	201-500	387 contacts →
	Exact match “We are Trio – global energy and sustainability advisors.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
19	Greenflex	Exact match	Paris, FranceHQ recorded Oct 9, 2026	501-1,000	368 contacts →
	Exact match “Since 2009, GreenFlex has been a key partner in the energy, environmental and societal transformation of organizations, enabling them to change their trajectory towards an economy…” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
20	NUS Consulting Group	Exact match	Park Ridge, NJ, United StatesHQ recorded Oct 9, 2026	201-500	360 contacts →
	Exact match “National Utility Service, Inc.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
21	EMM Consulting PTY Limited	Exact match	St Leonards, AustraliaHQ recorded Oct 9, 2026	201-500	354 contacts →
	Exact match “At EMM, we believe that a sustainable future is achievable, and we are dedicated to helping our clients and the community make it a reality.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
22	Triton Environmental Consultants LTD	Exact match	Vancouver, BC, CanadaHQ recorded Oct 9, 2026	201-500	348 contacts →
	Exact match “Triton Environmental Consultants knows western Canada.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
23	Environmental Consulting & Technology, Inc. ECT	Exact match	Gainesville, FL, United StatesHQ recorded Oct 9, 2026	201-500	330 contacts →
	Exact match “Environmental Consulting & Technology, Inc.(ECT) is a multi-disciplinary environmental and sustainability consulting firm delivering strategy, permitting, design, and management…” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
24	ETP CC	Exact match	AustraliaHQ recorded Oct 9, 2026	n/a	324 contacts →
	Exact match “Management Consulting in the Energy Sector” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
25	Umwelt Environmental & Social Consultants	Exact match	Teralba, AustraliaHQ recorded Oct 9, 2026	201-500	318 contacts →
	Exact match “Umwelt has been trusted by clients and communities for over 30 years.” Recorded in the RevenueBase company graph · Oct 9, 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 “clean energy policy consultants”. 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 14,312 clean energy policy consultants worldwide

See the full list, filter by size, metro and specialty, and access 41,104 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Clean energy policy consultants worldwide at a glance

As of Oct 9, 2026

31.6%Verified-email coverage

9.1Average contacts per company

1-10Median size (employees)

1.7%Largest-city concentration · London

Oct 9, 2026Page data refreshed

Companies by employee count

1-10

9,968

11-50

3,485

51-200

613

201-500

123

501-1,000

1,001-5,000

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 clean energy policy consultants are linked below.
What qualifies: Company records worldwide whose business descriptions match “clean energy policy consultants” 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 41,104 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 9, 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.

Clean energy policy consultants by location

88 lists · largest first

Every Clean energy policy consultants 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 “clean energy policy consultants”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many clean energy policy consultants are there worldwide?

RevenueBase identified 14,312 company matches for clean energy policy consultants 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?

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

Which country has the most clean energy policy consultants?

The United States leads with 1,708 companies, followed by Brazil (1,273) and the United Kingdom (734). Every clean energy policy consultants list by country and city is linked on this page.

Which city has the most clean energy policy consultants?

London leads with 237 company records, followed by Sao Paulo (175) and Paris (133).

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 41,104 professional contacts with verified work emails tracked across these 14,312 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 9, 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.