Company lists · Data refreshed September 2026

Top 25 Environmental compliance law firms worldwide

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

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 8,179 companies tracked

RevenueBase identified 8,179 environmental compliance law firms worldwide as of September 2026 and tracks 94,673 professional contacts across them, including 42,301 with verified work emails. The United States is the largest market and Sao Paulo the largest hub.

This list covers environmental compliance law 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 28, 2026. Country and city lists for environmental compliance law 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 28, 2026 86% judged on-target in blind review

8,179Companies

94,673Contacts tracked

42,301Verified emails

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The 25 largest environmental compliance law firms worldwide

Ranked by team size

Top 25 of 8,179 environmental compliance law firms worldwide, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to environmental compliance law 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	Nelson Mullins Riley & Scarborough	Partial evidence	Columbia, SC, United StatesHQ checked Sep 28, 2026	1,001-5,000	2,012 contacts →
	Partial evidence “Established in 1897, Nelson Mullins is an Am Law 100 firm of more than attorneys, policy advisors and professionals with 33 offices in 17 states and Washington, D.C.” Source: RevenueBase Database · checked Sep 28, 2026
2	Venable LLP	Strong evidence	Washington, DC, United StatesHQ checked Sep 28, 2026	1,001-5,000	1,790 contacts →
	Strong evidence “Committed to Your Success – As a law firm of more than 900 professionals, Venable delivers legal services globally in every area of regulatory compliance, government affairs…” Source: RevenueBase Database · checked Sep 28, 2026
3	Ballard Spahr LLP	Partial evidence	Philadelphia, PA, United StatesHQ checked Sep 28, 2026	1,001-5,000	1,682 contacts →
	Partial evidence “Ballard Spahr LLP, an Am Law 100 law firm with more than 750 lawyers in 19 U.S.” Source: RevenueBase Database · checked Sep 28, 2026
4	Buchanan Ingersoll & Rooney PC	Partial evidence	Pittsburgh, PA, United StatesHQ checked Sep 28, 2026	501-1,000	1,197 contacts →
	Partial evidence “Buchanan Ingersoll & Rooney is a national law firm with a proven reputation for providing progressive, industry-leading legal, business, regulatory and government relations advice…” Source: RevenueBase Database · checked Sep 28, 2026
5	Bennett Jones	Partial evidence	Calgary, AB, CanadaHQ checked Sep 28, 2026	501-1,000	1,144 contacts →
	Partial evidence “For over a century, Bennett Jones has been an internationally recognized Canadian law firm founded and focused on principles of professional excellence, integrity, respect and…” Source: RevenueBase Database · checked Sep 28, 2026
6	Alliance Technical Group	Partial evidence	Decatur, AL, United StatesHQ checked Sep 28, 2026	1,001-5,000	956 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 28, 2026
7	Bracewell LLP	Partial evidence	Houston, TX, United StatesHQ checked Sep 28, 2026	501-1,000	933 contacts →
	Partial evidence “Bracewell LLP is a leading law and government relations firm.” Source: RevenueBase Database · checked Sep 28, 2026
8	Brownstein Hyatt Farber Schreck	Partial evidence	Denver, CO, United StatesHQ checked Sep 28, 2026	501-1,000	902 contacts →
	Partial evidence “For decades, we’ve positioned ourselves at the intersection of law, business and policy to bring a multidisciplinary strategy to every issue.” Source: RevenueBase Database · checked Sep 28, 2026
9	Hall Booth Smith, P.C	Partial evidence	Atlanta, GA, United StatesHQ checked Sep 28, 2026	501-1,000	815 contacts →
	Partial evidence “Established in 1989, Hall Booth Smith, P.C.(HBS) is a full-service law firm with 33 offices across the United States.” Source: RevenueBase Database · checked Sep 28, 2026
10	CT Corporation	Strong evidence	New York, NY, United StatesHQ checked Sep 28, 2026	1,001-5,000	788 contacts →
	Strong evidence “CT Corporation helps small businesses, corporations, and law firms around the world manage their most critical business and legal compliance responsibilities.” Source: RevenueBase Database · checked Sep 28, 2026
11	Steptoe & Johnson Pllc	Partial evidence	Bridgeport, WV, United StatesHQ checked Sep 28, 2026	501-1,000	757 contacts →
	Partial evidence “Steptoe & Johnson PLLC is a law firm nationally recognized for its strengths in energy law with more than a century of know-how in the areas of business, employment, and…” Source: RevenueBase Database · checked Sep 28, 2026
12	Environmental Science Associates	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 28, 2026	501-1,000	732 contacts →
	Partial evidence “ESA is a 100% employee-owned environmental consulting firm.” Source: RevenueBase Database · checked Sep 28, 2026
13	Kelley Drye & Warren LLP	Partial evidence	New York, NY, United StatesHQ checked Sep 28, 2026	501-1,000	690 contacts →
	Partial evidence “Kelley Drye is an AmLaw 200 law firm of more than 350 lawyers and other professionals practicing in New York, NY; Washington, D.C; Chicago, IL; Houston, TX, Los Angeles, CA; San…” Source: RevenueBase Database · checked Sep 28, 2026
14	Robinson Cole	Partial evidence	Hartford, CT, United StatesHQ checked Sep 28, 2026	201-500	622 contacts →
	Partial evidence “Robinson+Cole is a service mark of Robinson & Cole LLP, a law firm with offices throughout the Northeast, Mid-Atlantic, Florida, and California serving regional, national, and…” Source: RevenueBase Database · checked Sep 28, 2026
15	Parker POE Adams & Bernstein LLP	Indirect evidence	Charlotte, NC, United StatesHQ checked Sep 28, 2026	501-1,000	584 contacts →
	Indirect evidence “Businesses and local governments turn to Parker Poe to structure transactions, navigate regulations, and resolve disputes.” Source: RevenueBase Database · checked Sep 28, 2026
16	Bond, Schoeneck & King Pllc	Partial evidence	Syracuse, NY, United StatesHQ checked Sep 28, 2026	201-500	581 contacts →
	Partial evidence “Bond is a full-service law firm counseling individuals, companies, not-for-profits and public sector entities in a wide spectrum of practice areas.” Source: RevenueBase Database · checked Sep 28, 2026
17	Wiley Rein LLP	Indirect evidence	Washington, DC, United StatesHQ checked Sep 28, 2026	501-1,000	576 contacts →
	Indirect evidence “Founded in 1983, Wiley is a dominant presence in the nation’s capital.” Source: RevenueBase Database · checked Sep 28, 2026
18	Michelmores	Partial evidence	United KingdomHQ checked Sep 28, 2026	201-500	531 contacts →
	Partial evidence “Michelmores is the destination law firm for the ambitious, the imaginative and the distinctive.” Source: RevenueBase Database · checked Sep 28, 2026
19	Best Best & Krieger LLP BBK	Indirect evidence	Riverside, CA, United StatesHQ checked Sep 28, 2026	201-500	522 contacts →
	Indirect evidence “Best Best & Krieger serves as a trusted partner and strategist to public and private sector clients across the nation.” Source: RevenueBase Database · checked Sep 28, 2026
20	Marcelo Tostes Advogados	Indirect evidence	Sao Paulo, BrazilHQ checked Sep 28, 2026	201-500	518 contacts →
	Indirect evidence “Fundado em o Marcelo Tostes Advogados firmou-se como um escritório de advocacia empresarial de excelência.” Source: RevenueBase Database · checked Sep 28, 2026
21	Goodmans LLP	Partial evidence	Toronto, ON, CanadaHQ checked Sep 28, 2026	201-500	500 contacts →
	Partial evidence “Goodmans LLP is recognized internationally as one of Canada's premier transaction law firms because our lawyers and clients are industry leaders.” Source: RevenueBase Database · checked Sep 28, 2026
22	Rincon Consultants	Partial evidence	Ventura, CA, United StatesHQ checked Sep 28, 2026	501-1,000	479 contacts →
	Partial 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 28, 2026
23	Balch & Bingham LLP	Partial evidence	Birmingham, AL, United StatesHQ checked Sep 28, 2026	201-500	472 contacts →
	Partial evidence “Balch & Bingham LLP is a full-service corporate law firm recognized nationally for its genuine dedication to its clients, forward-thinking approach, and ability to anticipate what…” Source: RevenueBase Database · checked Sep 28, 2026
24	Sete Soluções E Tecnologia Ambiental	Indirect evidence	Belo Horizonte, BrazilHQ checked Sep 28, 2026	501-1,000	448 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 28, 2026
25	Groundwater & Environmental Services, INC	Partial evidence	Wall Township, NJ, United StatesHQ checked Sep 28, 2026	201-500	447 contacts →
	Partial evidence “We are Groundwater & Environmental Services, Inc, better known as GES.” Source: RevenueBase Database · checked Sep 28, 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 law 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 law firms.
Partial evidence: Its own public description names part of environmental compliance law 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 law 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 8,179 environmental compliance law firms worldwide

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Environmental compliance law firms worldwide at a glance

As of Sep 28, 2026

44.7%Verified-email coverage

11.6Average contacts per company

1-10Median size (employees)

3.1%Largest-city concentration · Sao Paulo

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

5,471

11-50

2,193

51-200

388

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

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 law 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 environmental compliance law firms are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “environmental compliance law 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 law 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 law 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, 42,301 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 28, 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 law firms by location

46 lists · largest first

Every Environmental compliance law 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 law 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 law firms are there worldwide?

RevenueBase identified 8,179 environmental compliance law 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?

Nelson Mullins Riley & Scarborough, headquartered in Columbia, tops this list with the largest team on record.

Which country has the most environmental compliance law firms?

The United States leads with 2,261 companies, followed by Brazil (1,602) and France (244). Every environmental compliance law firms list by country and city is linked on this page.

Which city has the most environmental compliance law firms?

Sao Paulo leads with 251 headquartered companies, followed by Paris (117) and Curitiba (93).

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 42,301 verified decision-maker contacts tracked across these 8,179 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 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 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.