Company lists · Data refreshed November 2026

Top 25 Certified sustainability consultants worldwide

Name: Certified sustainability consultants worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Nov 6, 2026 13,343 companies tracked

RevenueBase identified 13,343 company matches for certified sustainability consultants worldwide as of November 2026 and tracks 103,582 professional contacts across them, including 35,518 with verified work emails. Brazil is the largest market and London the largest hub.

This list covers company matches for certified sustainability 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 November 6, 2026. Country and city lists for certified sustainability 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 Nov 6, 2026 How this list was built

13,343Companies

103,582Contacts tracked

35,518Verified emails

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The 25 largest certified sustainability consultants worldwide

Ranked by team size

Top 25 of 13,343 company matches for certified sustainability consultants worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 6, 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 Nov 6, 2026	5,001-10,000	9,761 contacts →
	Exact match “Sustainability is our business.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2	SLR Consulting	Exact match	London, United KingdomHQ recorded Nov 6, 2026	1,001-5,000	4,208 contacts →
	Exact match “SLR is a committed partner in our clients’ sustainability journeys.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3	BDO Nederland	Exact match	Eindhoven, NetherlandsHQ recorded Nov 6, 2026	1,001-5,000	2,458 contacts →
	Exact match “At BDO, we help people and organisations achieve their sustainable future.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
4	Ecovadis	Exact match	Paris, JapanHQ recorded Nov 6, 2026	1,001-5,000	1,842 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5	OLA	Exact match	Austin, TX, United StatesHQ recorded Nov 6, 2026	n/a	1,164 contacts →
	Exact match “OLA Sustainability, LLC OLA Sustainability is a consulting firm that focuses on integrating sustainable practices into commercial and multifamily design projects.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6	Ecocert Group	Exact match	L’isle-jourdain, FranceHQ recorded Nov 6, 2026	1,001-5,000	824 contacts →
	Exact match “For over 30 years, ECOCERT has and continues to assist stakeholders in the implementation and promotion of sustainable practices through certification, consulting and training.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7	Diagonal	Exact match	Sao Paulo, BrazilHQ recorded Nov 6, 2026	501-1,000	584 contacts →
	Exact match “Diagonal is a pioneering socio-environmental management consultancy that helps companies, organizations and governments to raise their ESG standard and generate a positive…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8	ADP Consulting	Exact match	Melbourne, AustraliaHQ recorded Nov 6, 2026	201-500	472 contacts →
	Exact match “ADP Consulting, an Ayesa company, is a sustainability-led engineering consultancy on a quest to inspire a better world through influence and design.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9	SIPL	Exact match	Noida, IndiaHQ recorded Nov 6, 2026	n/a	407 contacts →
	Exact match “SIPL Pvt Ltd is an established and reputed firm in the Sustainable domain since 2008.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10	Valpak Limited	Exact match	Stratford-upon-avon, United KingdomHQ recorded Nov 6, 2026	201-500	404 contacts →
	Exact match “Valpak, a Reconomy brand, is an EcoVadis Platinum certified leader in environmental compliance, recycling, and sustainability solutions.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11	P2s	Exact match	Long Beach, CA, United StatesHQ recorded Nov 6, 2026	201-500	379 contacts →
	Exact match “P2S has brought forward-thinking, sustainable engineering solutions to the West Coast and beyond for over 35 years.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12	Ecol Studio Lifeanalytics	Exact match	Lucca, ItalyHQ recorded Nov 6, 2026	201-500	375 contacts →
	Exact match “Salute, Sicurezza, Ambiente e Qualità del prodotto: sei davvero sostenibile?” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13	Greenflex	Exact match	Paris, FranceHQ recorded Nov 6, 2026	501-1,000	374 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 · Nov 6, 2026 · View company records in RevenueBase
14	EMM Consulting PTY Limited	Exact match	St Leonards, AustraliaHQ recorded Nov 6, 2026	201-500	363 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 · Nov 6, 2026 · View company records in RevenueBase
15	NUS Consulting Group	Exact match	Park Ridge, United StatesHQ recorded Nov 6, 2026	201-500	363 contacts →
	Exact match “National Utility Service, Inc.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16	Anthesis ESP	Exact match	Manlleu, SpainHQ recorded Nov 6, 2026	201-500	343 contacts →
	Exact match “Som una empresa especialitzada en sostenibilitat, aliada amb les organitzacions, territoris i persones compromesos amb un món més sostenible, als quals acompanyem en la seva…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17	CTE	Exact match	São Paulo, BrazilHQ recorded Nov 6, 2026	51-200	322 contacts →
	Exact match “CTE is a consulting company, which has 28 years of experience in the Construction Industry, offering clients consultancy across a wide range of service nable Projects and Green…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18	Atelier TEN	Exact match	London, United KingdomHQ recorded Nov 6, 2026	51-200	313 contacts →
	Exact match “As environmental design consultants, building services engineers and lighting designers, we are committed to high performance and sustainable design within the built environment.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19	Quantis	Exact match	Lausanne, SwitzerlandHQ recorded Nov 6, 2026	201-500	311 contacts →
	Exact match “Quantis, part of BCG, is a sustainability consulting firm that helps organizations translate sustainability ambition into measurable business value.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20	Ecology And Environment, INC	Exact match	Lancaster, NY, United StatesHQ recorded Nov 6, 2026	5,001-10,000	310 contacts →
	Exact match “E&E is now WSP USA.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21	Grupo Partnership	Exact match	Rio De Janeiro, BrazilHQ recorded Nov 6, 2026	1,001-5,000	273 contacts →
	Exact match “Com uma força propulsora de inovação, nos dedicamos a criar e aplicar soluções que elevam o padrão de nossos serviços no mercado.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22	Valora Consultores	Exact match	Madrid, SpainHQ recorded Nov 6, 2026	51-200	255 contacts →
	Exact match “VALORA is a consulting company who focus its activity towards a new professional innovative and thrilling challenge.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23	GAP Ssma	Exact match	Goiânia, BrazilHQ recorded Nov 6, 2026	201-500	251 contacts →
	Exact match “A GAP Ambiental oferece serviços para pequenas, médias e grandes empresas em diversas áreas que vão desde o licenciamento ao acompanhamento da execução de projetos.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
24	Wardell Armstrong LLP NOW SLR	Exact match	Stoke On Trent, United KingdomHQ recorded Nov 6, 2026	501-1,000	226 contacts →
	Exact match “Wardell Armstrong is now part of SLR which is a leading global consultancy, accelerating our ability to deliver the net zero transition and helping our clients address critical…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
25	SGA Parte DE SLR	Exact match	Santiago, ChileHQ recorded Nov 6, 2026	201-500	219 contacts →
	Exact match “SGA S.A.” Recorded in the RevenueBase company graph · Nov 6, 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 “certified sustainability 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 13,343 certified sustainability consultants worldwide

See the full list, filter by size, metro and specialty, and access 35,518 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Certified sustainability consultants worldwide at a glance

As of Nov 6, 2026

34.3%Verified-email coverage

7.8Average contacts per company

1-10Median size (employees)

2.6%Largest-city concentration · London

Nov 6, 2026Page data refreshed

Companies by employee count

1-10

10,261

11-50

2,513

51-200

402

201-500

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 certified sustainability consultants are linked below.
What qualifies: Company records worldwide whose business descriptions match “certified sustainability 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 35,518 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 November 6, 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.

Certified sustainability consultants by location

98 lists · largest first

Every Certified sustainability 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 “certified sustainability consultants”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many certified sustainability consultants are there worldwide?

RevenueBase identified 13,343 company matches for certified sustainability consultants worldwide as of November 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 certified sustainability consultants?

Brazil leads with 1,138 companies, followed by the United States (1,044) and the United Kingdom (900). Every certified sustainability consultants list by country and city is linked on this page.

Which city has the most certified sustainability consultants?

London leads with 348 company records, followed by Sao Paulo (224) and Paris (197).

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 35,518 professional contacts with verified work emails tracked across these 13,343 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 November 6, 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.