Company lists · Data refreshed September 2026

Top 25 Environmental policy consulting firms worldwide

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

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 27,328 companies tracked

RevenueBase identified 27,328 environmental policy consulting firms worldwide as of September 2026 and tracks 325,012 professional contacts across them, including 121,726 with verified work emails. The United States is the largest market and Sao Paulo the largest hub.

This list covers environmental policy 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 28, 2026. Country and city lists for environmental policy 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 HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 28, 2026 86% judged on-target in blind review

27,328Companies

325,012Contacts tracked

121,726Verified emails

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The 25 largest environmental policy consulting firms worldwide

Ranked by team size

Top 25 of 27,328 environmental policy consulting 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 policy 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	Stantec	Indirect evidence	Edmonton, AB, CanadaHQ checked Sep 28, 2026	10001+	28,416 contacts →
	Indirect evidence “Stantec empowers clients, people, and communities to rise to the world’s greatest challenges at a time when the world faces more unprecedented concerns than ever before.” Source: RevenueBase Database · checked Sep 28, 2026
2	WSP In The U.S	Partial evidence	New York, NY, United StatesHQ checked Sep 28, 2026	10001+	9,318 contacts →
	Partial evidence “What if you could shape built and natural environments – and the future of those that use them?” Source: RevenueBase Database · checked Sep 28, 2026
3	ERM	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	5,001-10,000	9,119 contacts →
	Indirect evidence “Sustainability is our business.” Source: RevenueBase Database · checked Sep 28, 2026
4	SLR Consulting	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	1,001-5,000	3,848 contacts →
	Indirect evidence “SLR is a committed partner in our clients’ sustainability journeys.” Source: RevenueBase Database · checked Sep 28, 2026
5	APTIM	Partial evidence	Baton Rouge, LA, United StatesHQ checked Sep 28, 2026	1,001-5,000	2,639 contacts →
	Partial evidence “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.” Source: RevenueBase Database · checked Sep 28, 2026
6	Ambipar	Partial evidence	Sao Paulo, BrazilHQ checked Sep 28, 2026	10001+	2,599 contacts →
	Partial evidence “Our mission is to promote ecological transformation by investing in decarbonization projects, circular economy, energy transition, and environmental regeneration.” Source: RevenueBase Database · checked Sep 28, 2026
7	Geosyntec Consultants	Strong evidence	Boca Raton, FL, United StatesHQ checked Sep 28, 2026	1,001-5,000	2,393 contacts →
	Strong evidence “Geosyntec is a consulting and engineering firm that works with private and public sector clients to address new ventures and complex problems involving our environment, natural…” Source: RevenueBase Database · checked Sep 28, 2026
8	Baringa	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	1,001-5,000	2,179 contacts →
	Partial evidence “Baringa is a global consulting firm that helps leaders drive meaningful change and create value.” Source: RevenueBase Database · checked Sep 28, 2026
9	Civil & Environmental Consultants, INC	Strong evidence	Moon Township, PA, United StatesHQ checked Sep 28, 2026	1,001-5,000	2,145 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 28, 2026
10	Swca Environmental Consultants	Strong evidence	Phoenix, AZ, United StatesHQ checked Sep 28, 2026	1,001-5,000	1,629 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 28, 2026
11	Montrose Environmental Group	Partial evidence	Little Rock, AR, United StatesHQ checked Sep 28, 2026	1,001-5,000	1,529 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 28, 2026
12	IPE Global Limited	Indirect evidence	New Delhi, IndiaHQ checked Sep 28, 2026	501-1,000	1,322 contacts →
	Indirect evidence “Headquartered in India with six international offices in Cambodia, Ethiopia, Kenya, the Philippines, Germany and the United Kingdom, IPE Global Group offers a range of integrated…” Source: RevenueBase Database · checked Sep 28, 2026
13	Adec Innovations	Indirect evidence	Irvine, CA, United StatesHQ checked Sep 28, 2026	1,001-5,000	1,304 contacts →
	Indirect evidence “ADEC Innovations seamlessly delivers fully integrated, cost-effective industry expertise, business process & data management, and software services.” Source: RevenueBase Database · checked Sep 28, 2026
14	RSK Group	Partial evidence	Helsby, United KingdomHQ checked Sep 28, 2026	10001+	1,255 contacts →
	Partial evidence “RSK Group is a global leader in the delivery of environmental and engineering solutions.” Source: RevenueBase Database · checked Sep 28, 2026
15	DGE Danmark	Indirect evidence	Højbjerg, DenmarkHQ checked Sep 28, 2026	n/a	1,176 contacts →
	Indirect evidence “Miljø er vores kernekompetence og vores ansvar.” Source: RevenueBase Database · checked Sep 28, 2026
16	OLA	Partial evidence	Austin, TX, United StatesHQ checked Sep 28, 2026	n/a	1,145 contacts →
	Partial evidence “OLA Sustainability, LLC OLA Sustainability is a consulting firm that focuses on integrating sustainable practices into commercial and multifamily design projects.” Source: RevenueBase Database · checked Sep 28, 2026
17	Verdantas	Partial evidence	Tampa, FL, United StatesHQ checked Sep 28, 2026	1,001-5,000	1,139 contacts →
	Partial evidence “At Verdantas, we blend engineering and environmental science together with advanced technology and world-renowned labs to create solutions with the big picture in mind.” Source: RevenueBase Database · checked Sep 28, 2026
18	Apex Companies	Indirect evidence	Rockville, MD, United StatesHQ checked Sep 28, 2026	1,001-5,000	1,137 contacts →
	Indirect evidence “Who is Apex?” Source: RevenueBase Database · checked Sep 28, 2026
19	Barr Engineering CO	Strong evidence	Minneapolis, MN, United StatesHQ checked Sep 28, 2026	1,001-5,000	1,088 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 28, 2026
20	Triumvirate Environmental	Partial evidence	Somerville, MA, United StatesHQ checked Sep 28, 2026	1,001-5,000	1,068 contacts →
	Partial evidence “Triumvirate Environmental provides sustainable environmental solutions to leading companies in the Life Sciences, Healthcare, Education, and Advanced Manufacturing markets.” Source: RevenueBase Database · checked Sep 28, 2026
21	Braun Intertec Corporation	Partial evidence	Minneapolis, MN, United StatesHQ checked Sep 28, 2026	1,001-5,000	1,065 contacts →
	Partial evidence “At Braun Intertec, we work at the intersection of the natural and built environments, combining science, technology, and engineering.” Source: RevenueBase Database · checked Sep 28, 2026
22	IEA	Strong evidence	Brooklyn Park, MN, United StatesHQ checked Sep 28, 2026	n/a	982 contacts →
	Strong evidence “The Institute for Environmental Assessment, Inc.(IEA) is small business committed to providing trusted environmental safety consulting services for private and public…” Source: RevenueBase Database · checked Sep 28, 2026
23	Trinity Consultants	Partial evidence	Dallas, TX, United StatesHQ checked Sep 28, 2026	1,001-5,000	961 contacts →
	Partial 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 28, 2026
24	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
25	Pinchin In Canada	Indirect evidence	Mississauga, ON, CanadaHQ checked Sep 28, 2026	1,001-5,000	895 contacts →
	Indirect evidence “Pinchin Ltd.” 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 policy 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 policy consulting firms.
Partial evidence: Its own public description names part of environmental policy 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 policy 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 27,328 environmental policy consulting firms worldwide

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Environmental policy consulting firms worldwide at a glance

As of Sep 28, 2026

37.5%Verified-email coverage

11.9Average 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

19,000

11-50

6,516

51-200

1,282

201-500

275

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 policy 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: Every country. Country and city lists for environmental policy consulting firms are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “environmental policy 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 policy 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 policy 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, 121,726 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 policy consulting firms by location

126 lists · largest first

Every Environmental policy 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 policy 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 policy consulting firms are there worldwide?

RevenueBase identified 27,328 environmental policy 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?

Stantec, headquartered in Edmonton, tops this list with the largest team on record.

Which country has the most environmental policy consulting firms?

The United States leads with 4,041 companies, followed by Brazil (3,389) and France (1,344). Every environmental policy consulting firms list by country and city is linked on this page.

Which city has the most environmental policy consulting firms?

Sao Paulo leads with 467 headquartered companies, followed by London (335) and Paris (295).

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 121,726 verified decision-maker contacts tracked across these 27,328 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.