Company lists · Data refreshed October 2026

Top 25 Environmental consultancy firms worldwide

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

Compiled by the RevenueBase Data Team Data refreshed Oct 1, 2026 36,628 companies tracked

RevenueBase identified 36,628 company matches for environmental consultancy firms worldwide as of October 2026 and tracks 600,873 professional contacts across them, including 206,283 with verified work emails. The United States is the largest market and Sao Paulo the largest hub.

This list covers company matches for environmental consultancy 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 October 1, 2026. Country and city lists for environmental consultancy 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 Oct 1, 2026 How this list was built

36,628Companies

600,873Contacts tracked

206,283Verified emails

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The 25 largest environmental consultancy firms worldwide

Ranked by team size

Top 25 of 36,628 company matches for environmental consultancy firms worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 1, 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	Stantec	Exact match	Edmonton, AB, CanadaHQ recorded Oct 1, 2026	10001+	28,416 contacts →
	Exact match “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.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
2	Autonomo	Exact match	Córdoba, SpainHQ recorded Oct 1, 2026	n/a	23,018 contacts →
	Exact match “Calidad y Gestión es una empresa consultora de ámbito internacional especializada en servicios de asesoría en las siguientes áreas: Calidad Medio Ambiente Responsabilidad social…” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
3	Tetra Tech	Exact match	Pasadena, CA, United StatesHQ recorded Oct 1, 2026	10001+	12,999 contacts →
	Exact match “Tetra Tech is the leader in water, environment and sustainable infrastructure, providing high-end technical and engineering services for projects worldwide.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
4	WSP In The U.S	Exact match	New York, NY, United StatesHQ recorded Oct 1, 2026	10001+	9,318 contacts →
	Exact match “What if you could shape built and natural environments – and the future of those that use them?” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
5	ERM	Exact match	London, United KingdomHQ recorded Oct 1, 2026	5,001-10,000	9,119 contacts →
	Exact match “Sustainability is our business.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
6	Terracon	Exact match	Olathe, KS, United StatesHQ recorded Oct 1, 2026	5,001-10,000	6,113 contacts →
	Exact match “Terracon is a 100 percent employee-owned consulting engineering firm providing quality services to clients.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
7	SLR Consulting	Exact match	London, United KingdomHQ recorded Oct 1, 2026	1,001-5,000	3,848 contacts →
	Exact match “SLR is a committed partner in our clients’ sustainability journeys.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
8	Norconsult	Exact match	Sandvika, NorwayHQ recorded Oct 1, 2026	5,001-10,000	3,555 contacts →
	Exact match “Norconsult is a multidisciplinary engineering and design consultancy, providing services to clients in the public and private sectors worldwide.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
9	National Engineering Services Pakistan PVT Limited Nespak	Exact match	Lahore, PakistanHQ recorded Oct 1, 2026	5,001-10,000	3,266 contacts →
	Exact match “NESPAK is Pakistan’s premier consultancy organization (established in 1973).” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
10	Golder	Exact match	Vancouver, BC, CanadaHQ recorded Oct 1, 2026	5,001-10,000	3,167 contacts →
	Exact match “Golder was acquired by WSP.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
11	NIRAS	Exact match	Allerød, DenmarkHQ recorded Oct 1, 2026	1,001-5,000	2,699 contacts →
	Exact match “At NIRAS, we engineer solutions for a shared future.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
12	APTIM	Exact match	Baton Rouge, LA, United StatesHQ recorded Oct 1, 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 · Oct 1, 2026 · View company records in RevenueBase
13	Multiconsult	Exact match	Oslo, NorwayHQ recorded Oct 1, 2026	1,001-5,000	2,553 contacts →
	Exact match “Multiconsult Norway is one of the leading firms of architectures, consulting engineers and designers in Norway.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
14	Brown And Caldwell	Exact match	Walnut Creek, CA, United StatesHQ recorded Oct 1, 2026	1,001-5,000	2,473 contacts →
	Exact match “Headquartered in Walnut Creek, Calif, Brown and Caldwell is an employee-owned firm with 2,100+ professionals serving clients locally and globally from 52 locations.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
15	Geosyntec Consultants	Exact match	Boca Raton, FL, United StatesHQ recorded Oct 1, 2026	1,001-5,000	2,393 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
16	SRK Consulting	Exact match	Vancouver, CanadaHQ recorded Oct 1, 2026	1,001-5,000	2,259 contacts →
	Exact match “SRK Consulting is an independent, international group providing specialised consultancy services.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
17	Providence	Exact match	Baton Rouge, LA, United StatesHQ recorded Oct 1, 2026	n/a	2,232 contacts →
	Exact match “Providence is an employee-owned engineering and environmental consulting firm.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
18	ECS Group Of Companies	Exact match	Chantilly, VA, United StatesHQ recorded Oct 1, 2026	1,001-5,000	2,210 contacts →
	Exact match “ECS Group of Companies is a Chantilly, VA-based consulting engineering firm.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
19	Baringa	Exact match	London, United KingdomHQ recorded Oct 1, 2026	1,001-5,000	2,179 contacts →
	Exact match “Baringa is a global consulting firm that helps leaders drive meaningful change and create value.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
20	Langan Engineering & Environmental Services	Exact match	Parsippany, NJ, United StatesHQ recorded Oct 1, 2026	1,001-5,000	2,177 contacts →
	Exact match “Langan's client-focused, highly entrepreneurial culture cultivates an environment of opportunities in which career growth and teamwork flourish.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
21	Civil & Environmental Consultants, INC	Exact match	Moon Township, PA, United StatesHQ recorded Oct 1, 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 · Oct 1, 2026 · View company records in RevenueBase
22	Ricardo	Exact match	West Sussex, United KingdomHQ recorded Oct 1, 2026	1,001-5,000	2,104 contacts →
	Exact match “Ricardo, a member of @WSP, is a global engineering company, specialising in complex propulsion, driveline and energy systems, delivering high integrity solutions for customers…” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
23	Hazen And Sawyer	Exact match	New York, NY, United StatesHQ recorded Oct 1, 2026	1,001-5,000	2,100 contacts →
	Exact match “As Hazen marks 75 years, we celebrate a legacy of absolute commitment to our clients while delivering the best technical work available anywhere.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
24	Burns & Mcdonnell India	Exact match	Vikhroli West, IndiaHQ recorded Oct 1, 2026	1,001-5,000	1,724 contacts →
	Exact match “At Burns & McDonnell India, we are a diverse team of talented engineers with multidiscipline design and consultancy working across sectors in critical infrastructure: oil and gas…” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
25	Swca Environmental Consultants	Exact match	Phoenix, AZ, United StatesHQ recorded Oct 1, 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 · Oct 1, 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 consultancy 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 36,628 environmental consultancy firms worldwide

See the full list, filter by size, metro and specialty, and access 206,283 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Environmental consultancy firms worldwide at a glance

As of Oct 1, 2026

34.3%Verified-email coverage

16.4Average contacts per company

1-10Median size (employees)

1.4%Largest-city concentration · Sao Paulo

Oct 1, 2026Page data refreshed

Companies by employee count

1-10

23,226

11-50

9,906

51-200

2,433

201-500

555

501-1,000

170

1,001-5,000

144

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 consultancy firms are linked below.
What qualifies: Company records worldwide whose business descriptions match “environmental consultancy 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 206,283 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 October 1, 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 consultancy firms by location

174 lists · largest first

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

How many environmental consultancy firms are there worldwide?

RevenueBase identified 36,628 company matches for environmental consultancy firms worldwide as of October 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?

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

Which country has the most environmental consultancy firms?

The United States leads with 4,594 companies, followed by Brazil (4,041) and the United Kingdom (2,459). Every environmental consultancy firms list by country and city is linked on this page.

Which city has the most environmental consultancy firms?

Sao Paulo leads with 513 company records, followed by London (407) and Belo Horizonte (234).

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 206,283 professional contacts with verified work emails tracked across these 36,628 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 October 1, 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.