Company lists · Data refreshed September 2026

Top 25 Environmental audit consulting firms worldwide

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

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 18,443 companies tracked

RevenueBase identified 18,443 company matches for environmental audit consulting firms worldwide as of September 2026 and tracks 205,813 professional contacts across them, including 67,305 with verified work emails. The United States is the largest market and Sao Paulo the largest hub.

This list covers company matches for environmental audit consulting 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 environmental audit consulting 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

18,443Companies

205,813Contacts tracked

67,305Verified emails

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The 25 largest environmental audit consulting firms worldwide

Ranked by team size

Top 25 of 18,443 company matches for environmental audit consulting 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	APTIM	Exact match	Baton Rouge, LA, United StatesHQ recorded Sep 28, 2026	1,001-5,000	2,639 contacts →
	Exact match “APTIM enhances the quality of the environment, wellbeing of people, resilience of communities, and opportunity for employees to make a difference, not just a living.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
2	Ambipar	Exact match	Sao Paulo, BrazilHQ recorded Sep 28, 2026	10001+	2,599 contacts →
	Exact match “Our mission is to promote ecological transformation by investing in decarbonization projects, circular economy, energy transition, and environmental regeneration.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
3	Civil & Environmental Consultants, INC	Exact match	Moon Township, PA, United StatesHQ recorded Sep 28, 2026	1,001-5,000	2,145 contacts →
	Exact match “Civil & Environmental Consultants, Inc.(CEC) provides comprehensive market-oriented consulting services that advance the strategic business objectives of its clients.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
4	Ecovadis	Exact match	Paris, JapanHQ recorded Sep 28, 2026	1,001-5,000	1,854 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
5	BDO Brazil	Exact match	Sp, BrazilHQ recorded Sep 28, 2026	1,001-5,000	1,791 contacts →
	Exact match “Presidida por Raul Corrêa da Silva, a BDO RCS foi fundada em 2001 e desde então mantém participação expressiva no mercado de auditorias.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
6	Grant Thornton Sweden	Exact match	Stockholm, SwedenHQ recorded Sep 28, 2026	1,001-5,000	1,724 contacts →
	Exact match “Grant Thornton är ett ledande revisions- och rådgivningsföretag med över 1400 medarbetare som erbjuder tjänster inom revision, skatt, redovisning och specialistrådgivning.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
7	Swca Environmental Consultants	Exact match	Phoenix, AZ, United StatesHQ recorded Sep 28, 2026	1,001-5,000	1,629 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 · Sep 28, 2026 · View company records in RevenueBase
8	Montrose Environmental Group	Exact match	Little Rock, AR, United StatesHQ recorded Sep 28, 2026	1,001-5,000	1,529 contacts →
	Exact match “Onterris (formerly Montrose Environmental Group) was one of the first to see environmental responsibility as not just an imperative but as a strategic asset.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
9	Kpmg Norway	Exact match	Oslo, NorwayHQ recorded Sep 28, 2026	1,001-5,000	1,498 contacts →
	Exact match “KPMG er mest kjent som revisorer, forretningskonsulenter og advokater, men vi er også mye mer.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
10	RSM Ebner Stolz	Exact match	Stuttgart, GermanyHQ recorded Sep 28, 2026	1,001-5,000	1,442 contacts →
	Exact match “Wollen Sie jemanden, der Sie auch beim Sprung in neue Märkte und bei allen anstehenden Herausforderungen begleitet?” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
11	Sphera	Exact match	Chicago, IL, United StatesHQ recorded Sep 28, 2026	1,001-5,000	1,349 contacts →
	Exact match “Sphera creates a safer, more sustainable and productive world.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
12	Adec Innovations	Exact match	Irvine, CA, United StatesHQ recorded Sep 28, 2026	1,001-5,000	1,304 contacts →
	Exact match “ADEC Innovations seamlessly delivers fully integrated, cost-effective industry expertise, business process & data management, and software services.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
13	RSK Group	Exact match	Helsby, United KingdomHQ recorded Sep 28, 2026	10001+	1,255 contacts →
	Exact match “RSK Group is a global leader in the delivery of environmental and engineering solutions.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
14	DGE Danmark	Exact match	Højbjerg, DenmarkHQ recorded Sep 28, 2026	n/a	1,176 contacts →
	Exact match “Miljø er vores kernekompetence og vores ansvar.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
15	Apex Companies	Exact match	Rockville, MD, United StatesHQ recorded Sep 28, 2026	1,001-5,000	1,137 contacts →
	Exact match “Who is Apex?” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
16	Barr Engineering CO	Exact match	Minneapolis, MN, United StatesHQ recorded Sep 28, 2026	1,001-5,000	1,088 contacts →
	Exact match “Barr provides engineering and environmental consulting services to clients across the Midwest, throughout the Americas, and around the world.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
17	IEA	Exact match	Brooklyn Park, MN, United StatesHQ recorded Sep 28, 2026	n/a	982 contacts →
	Exact match “The Institute for Environmental Assessment, Inc.(IEA) is small business committed to providing trusted environmental safety consulting services for private and public…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
18	Trinity Consultants	Exact match	Dallas, TX, United StatesHQ recorded Sep 28, 2026	1,001-5,000	961 contacts →
	Exact match “Trinity Consultants is a global team of experts helping organizations solve complex challenges in environmental compliance, ecological protection, infrastructure performance, and…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
19	Alliance Technical Group	Exact match	Decatur, AL, United StatesHQ recorded Sep 28, 2026	1,001-5,000	956 contacts →
	Exact match “Alliance is a new kind of environmental services company-powered by innovation, focused on service, and committed to client success.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
20	Pinchin In Canada	Exact match	Mississauga, ON, CanadaHQ recorded Sep 28, 2026	1,001-5,000	895 contacts →
	Exact match “Pinchin Ltd.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
21	ATC Group Services LLC	Exact match	Lafayette, LA, United StatesHQ recorded Sep 28, 2026	1,001-5,000	865 contacts →
	Exact match “ATC Group Services LLC is now Atlas.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
22	Interagua Ecuador	Exact match	Guayaquil, EcuadorHQ recorded Sep 28, 2026	501-1,000	783 contacts →
	Exact match “Somos una empresa sólida, confiable, orientada al cliente; líder en el manejo ambiental, con procesos de calidad, tecnología y recursos humanos competentes.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
23	Environmental Science Associates	Exact match	San Francisco, CA, United StatesHQ recorded Sep 28, 2026	501-1,000	732 contacts →
	Exact match “ESA is a 100% employee-owned environmental consulting firm.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
24	Antea Group USA	Exact match	St Paul, MN, United StatesHQ recorded Sep 28, 2026	1,001-5,000	658 contacts →
	Exact match “Antea Group is an international engineering and environmental consulting firm specializing in full-service solutions in the fields of environment, health and safety, and…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
25	Trihydro Corporation	Exact match	Laramie, WY, United StatesHQ recorded Sep 28, 2026	501-1,000	577 contacts →
	Exact match “Headquartered in Laramie, Wyoming, Trihydro provides environmental consulting, engineering and surveying, air quality and process management, information technology, and water and…” 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 “environmental audit consulting 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 18,443 environmental audit consulting firms worldwide

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Environmental audit consulting firms worldwide at a glance

As of Sep 28, 2026

32.7%Verified-email coverage

11.2Average contacts per company

1-10Median size (employees)

1.7%Largest-city concentration · Sao Paulo

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

12,039

11-50

4,973

51-200

1,025

201-500

220

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 environmental audit consulting firms are linked below.
What qualifies: Company records worldwide whose business descriptions match “environmental audit consulting 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 67,305 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.

Environmental audit consulting firms by location

88 lists · largest first

Every Environmental audit 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 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 “environmental audit consulting firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many environmental audit consulting firms are there worldwide?

RevenueBase identified 18,443 company matches for environmental audit consulting 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?

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

Which country has the most environmental audit consulting firms?

The United States leads with 3,020 companies, followed by Brazil (2,791) and India (701). Every environmental audit consulting firms list by country and city is linked on this page.

Which city has the most environmental audit consulting firms?

Sao Paulo leads with 321 company records, followed by Belo Horizonte (134) and Curitiba (118).

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 67,305 professional contacts with verified work emails tracked across these 18,443 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.

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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.