Company lists · Data refreshed September 2026

Top 25 Environmental compliance consulting firms worldwide

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

Compiled by the RevenueBase Data Team Data refreshed Sep 2, 2026 9,593 companies tracked

RevenueBase identified 9,593 environmental compliance consulting firms worldwide as of September 2026 and tracks 116,326 professional contacts across them, including 41,845 with verified work emails and 27,770 with mobile numbers. The United States is the largest market and Sao Paulo the largest hub.

This list covers environmental compliance 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 2, 2026. Country and city lists for environmental compliance 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 RevenueBase Smart Search rating on every row Refreshed Sep 2, 2026 86% judged on-target in blind review

9,593Companies

116,326Contacts tracked

41,845Verified emails

27,770Mobile numbers

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The 25 largest environmental compliance consulting firms worldwide

Ranked by team size

Top 25 of 9,593 environmental compliance consulting firms worldwide, ranked by team size, largest first. Data refreshed Sep 2, 2026. RevenueBase Smart Search rates how each company's information relates to environmental compliance 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	Civil & Environmental Consultants, INC	Strong evidence	Martinsburg, WV, US	1,001-5,000	2,152 contacts →
	Strong evidence “Civil & Environmental Consultants, Inc.(CEC) provides comprehensive market-oriented consulting services that advance the strategic business objectives of its clients.” Source: RevenueBase Database · checked Sep 2, 2026
2	Aparajitha Corporate Services Private Limited	Partial evidence	Madurai, IndiaHQ checked Sep 2, 2026	1,001-5,000	2,064 contacts →
	Partial evidence “Aparajitha: Revolutionising India's Regulatory Compliance Space With 25 years of experience, Aparajitha covers compliance for over establishments, factories, and 52 lakh contract…” Source: RevenueBase Database · checked Sep 2, 2026
3	Swca Environmental Consultants	Strong evidence	Phoenix, AZ, US	1,001-5,000	1,618 contacts →
	Strong evidence “Founded on a commitment to sound science and creative solutions, SWCA is a leader in environmental and management consulting services.” Source: RevenueBase Database · checked Sep 2, 2026
4	Montrose Environmental Group	Partial evidence	Little Rock, AR, US	1,001-5,000	1,516 contacts →
	Partial evidence “Onterris (formerly Montrose Environmental Group) was one of the first to see environmental responsibility as not just an imperative but as a strategic asset.” Source: RevenueBase Database · checked Sep 2, 2026
5	SCS Engineers	Strong evidence	Long Beach, CA, US	1,001-5,000	1,191 contacts →
	Strong evidence “SCS Engineers delivers environmental solutions by combining long-term experience with compliance and technological expertise.” Source: RevenueBase Database · checked Sep 2, 2026
6	DGE Danmark	Indirect evidence	Højbjerg, DenmarkHQ checked Sep 2, 2026	n/a	1,176 contacts →
	Indirect evidence “Miljø er vores kernekompetence og vores ansvar.” Source: RevenueBase Database · checked Sep 2, 2026
7	Apex Companies	Indirect evidence	Rockville, MD, US	1,001-5,000	1,146 contacts →
	Indirect evidence “Who is Apex?” Source: RevenueBase Database · checked Sep 2, 2026
8	Barr Engineering CO	Strong evidence	Washington, US	1,001-5,000	1,098 contacts →
	Strong evidence “Barr provides engineering and environmental consulting services to clients across the Midwest, throughout the Americas, and around the world.” Source: RevenueBase Database · checked Sep 2, 2026
9	Trinity Consultants	Strong evidence	Dallas, TX, US	1,001-5,000	949 contacts →
	Strong evidence “Trinity Consultants is a global team of experts helping organizations solve complex challenges in environmental compliance, ecological protection, infrastructure performance, and…” Source: RevenueBase Database · checked Sep 2, 2026
10	Alliance Technical Group	Partial evidence	Pittsburgh, PA, US	1,001-5,000	946 contacts →
	Partial evidence “Alliance is a new kind of environmental services company-powered by innovation, focused on service, and committed to client success.” Source: RevenueBase Database · checked Sep 2, 2026
11	Pinchin In Canada	Indirect evidence	Mississauga, ON, CA	1,001-5,000	883 contacts →
	Indirect evidence “Pinchin Ltd.” Source: RevenueBase Database · checked Sep 2, 2026
12	ATC Group Services LLC	Indirect evidence	Sharonville, OH, US	1,001-5,000	868 contacts →
	Indirect evidence “ATC Group Services LLC is now Atlas.” Source: RevenueBase Database · checked Sep 2, 2026
13	Pares&alvarez	Strong evidence	Santiago, ChileHQ checked Sep 2, 2026	501-1,000	807 contacts →
	Strong evidence “We are Pares & Alvarez, our extensive experience and the recognition of our clients makes us one of the leading Engineering Companies in environmental, consulting, engineering and…” Source: RevenueBase Database · checked Sep 2, 2026
14	The Foth Companies	Indirect evidence	Marion, MA, US	501-1,000	790 contacts →
	Indirect evidence “By combining science, engineering, and technology with a true collaborative spirit, Foth has delivered innovative solutions to our clients since 1938.” Source: RevenueBase Database · checked Sep 2, 2026
15	Environmental Science Associates	Strong evidence	Petaluma, CA, US	501-1,000	725 contacts →
	Strong evidence “ESA is a 100% employee-owned environmental consulting firm.” Source: RevenueBase Database · checked Sep 2, 2026
16	Antea Group USA	Strong evidence	White Plains, NY, US	1,001-5,000	658 contacts →
	Strong evidence “Antea Group is an international engineering and environmental consulting firm specializing in full-service solutions in the fields of environment, health and safety, and…” Source: RevenueBase Database · checked Sep 2, 2026
17	Trihydro Corporation	Strong evidence	Rock Springs, WY, US	501-1,000	571 contacts →
	Strong evidence “Headquartered in Laramie, Wyoming, Trihydro provides environmental consulting, engineering and surveying, air quality and process management, information technology, and water and…” Source: RevenueBase Database · checked Sep 2, 2026
18	CTA Engenharia	Indirect evidence	Rio De Janeiro, BR	201-500	546 contacts →
	Indirect evidence “A CTA foi criada em 1995, em Belo Horizonte Minas Gerais, ampliando sua atividade e posicionando sua sede no estado do Rio de Janeiro em Duque de Caxias, próximo ao Pólo…” Source: RevenueBase Database · checked Sep 2, 2026
19	Rincon Consultants	Strong evidence	San Diego, CA, US	501-1,000	483 contacts →
	Strong evidence “Rincon Consultants is a multi-disciplinary environmental sciences, planning, and engineering consulting firm that provides quality professional services to government and industry.” Source: RevenueBase Database · checked Sep 2, 2026
20	Anchor QEA	Strong evidence	Columbia, MD, US	501-1,000	478 contacts →
	Strong evidence “Headquartered in Seattle, Washington, Anchor QEA is a nationally recognized environmental science and engineering consulting firm specializing in aquatic, shoreline, and water…” Source: RevenueBase Database · checked Sep 2, 2026
21	VLS Environmental Solutions, LLC	Partial evidence	Houston, TX, US	1,001-5,000	477 contacts →
	Partial evidence “At VLS, we address your company’s most significant hurdles with waste management and compliance through sustainable solutions.” Source: RevenueBase Database · checked Sep 2, 2026
22	Vertex Resource Group LTD	Partial evidence	Calgary, AB, CA	1,001-5,000	466 contacts →
	Partial evidence “Since 1962, Vertex has been a leading North American provider of environmental services.” Source: RevenueBase Database · checked Sep 2, 2026
23	Enhesa	Partial evidence	Arlington, VA, US	201-500	463 contacts →
	Partial evidence “At Enhesa we empower the world’s largest businesses to achieve compliance, manage risk, and drive sustainability with clear, actionable insights.” Source: RevenueBase Database · checked Sep 2, 2026
24	Groundwater & Environmental Services, INC	Partial evidence	Amherst, NY, US	201-500	452 contacts →
	Partial evidence “We are Groundwater & Environmental Services, Inc, better known as GES.” Source: RevenueBase Database · checked Sep 2, 2026
25	Sete Soluções E Tecnologia Ambiental	Indirect evidence	Belo Horizonte, BR	501-1,000	444 contacts →
	Indirect evidence “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…” Source: RevenueBase Database · checked Sep 2, 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: environmental compliance 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 environmental compliance consulting firms.
Partial evidence: Its own public description names part of environmental compliance consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name environmental compliance 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 9,593 environmental compliance consulting firms worldwide

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Environmental compliance consulting firms worldwide at a glance

As of Sep 2, 2026

36.0%Verified-email coverage

23.9%Mobile-number coverage

12.1Average contacts per company

1-10Median size (employees)

2.1%Largest-city concentration · Sao Paulo

Sep 2, 2026Page data refreshed

Companies by employee count

1-10

6,008

11-50

2,760

51-200

601

201-500

102

501-1,000

1,001-5,000

5,001-10,000

10001+

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 environmental compliance 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: 34 countries, largest first: the United States, Brazil, India, Canada, Italy, Türkiye, France, Chile, Mexico, Australia and 24 more. Country and city lists for environmental compliance consulting firms are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “environmental compliance 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 environmental compliance 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 environmental compliance 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, 41,845 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 between September 2, 2026 and September 14, 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.

Environmental compliance consulting firms by location

53 lists · largest first

Every Environmental compliance 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 environmental compliance 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 environmental compliance consulting firms are there worldwide?

RevenueBase identified 9,593 environmental compliance 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?

Civil & Environmental Consultants, INC, headquartered in Martinsburg, tops this list with the largest team on record.

Which country has the most environmental compliance consulting firms?

The United States leads with 3,054 companies, followed by Brazil (1,866) and India (455). Every environmental compliance consulting firms list by country and city is linked on this page.

Which city has the most environmental compliance consulting firms?

Sao Paulo leads with 203 headquartered companies, followed by Belo Horizonte (80) and Curitiba (73).

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 41,845 verified decision-maker contacts tracked across these 9,593 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled from the company graph between September 2, 2026 and September 14, 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.