Company lists · Data refreshed September 2026

Top 25 Environmental consultant companies worldwide

Name: Environmental consultant companies worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 25,547 companies tracked

RevenueBase identified 25,547 company matches for environmental consultant companies worldwide as of September 2026 and tracks 349,867 professional contacts across them, including 116,720 with verified work emails. The United States is the largest market and Sao Paulo the largest hub.

This list covers company matches for environmental consultant companies 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 21, 2026. Country and city lists for environmental consultant companies 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 21, 2026 How this list was built

25,547Companies

349,867Contacts tracked

116,720Verified emails

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The 25 largest environmental consultant companies worldwide

Ranked by team size

Top 25 of 25,547 company matches for environmental consultant companies worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 21, 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	Tetra Tech	Exact match	Pasadena, CA, United StatesHQ recorded Sep 21, 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 · Sep 21, 2026 · View company records in RevenueBase
2	Terracon	Exact match	Olathe, KS, United StatesHQ recorded Sep 21, 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 · Sep 21, 2026 · View company records in RevenueBase
3	National Engineering Services Pakistan PVT Limited Nespak	Exact match	Lahore, PakistanHQ recorded Sep 21, 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 · Sep 21, 2026 · View company records in RevenueBase
4	Golder	Exact match	Vancouver, BC, CanadaHQ recorded Sep 21, 2026	5,001-10,000	3,167 contacts →
	Exact match “Golder was acquired by WSP.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
5	Brown And Caldwell	Exact match	Walnut Creek, CA, United StatesHQ recorded Sep 21, 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 · Sep 21, 2026 · View company records in RevenueBase
6	Geosyntec Consultants	Exact match	Boca Raton, FL, United StatesHQ recorded Sep 21, 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 · Sep 21, 2026 · View company records in RevenueBase
7	SRK Consulting	Exact match	Vancouver, CanadaHQ recorded Sep 21, 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 · Sep 21, 2026 · View company records in RevenueBase
8	Providence	Exact match	Baton Rouge, LA, United StatesHQ recorded Sep 21, 2026	n/a	2,232 contacts →
	Exact match “Providence is an employee-owned engineering and environmental consulting firm.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
9	Langan Engineering & Environmental Services	Exact match	Parsippany, NJ, United StatesHQ recorded Sep 21, 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 · Sep 21, 2026 · View company records in RevenueBase
10	Civil & Environmental Consultants, INC	Exact match	Moon Township, PA, United StatesHQ recorded Sep 21, 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 21, 2026 · View company records in RevenueBase
11	Ricardo	Exact match	West Sussex, United KingdomHQ recorded Sep 21, 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 · Sep 21, 2026 · View company records in RevenueBase
12	Hazen And Sawyer	Exact match	New York, NY, United StatesHQ recorded Sep 21, 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 · Sep 21, 2026 · View company records in RevenueBase
13	Swca Environmental Consultants	Exact match	Phoenix, AZ, United StatesHQ recorded Sep 21, 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 21, 2026 · View company records in RevenueBase
14	Exponent	Exact match	Menlo Park, CA, United StatesHQ recorded Sep 21, 2026	1,001-5,000	1,560 contacts →
	Exact match “In an era of accelerating change, Exponent is the only premium engineering and scientific consulting firm with the depth and breadth of expertise to solve our clients’ most…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
15	Montrose Environmental Group	Exact match	Little Rock, AR, United StatesHQ recorded Sep 21, 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 21, 2026 · View company records in RevenueBase
16	Vulcain Engineering Group	Exact match	Neuilly-sur-seine, FranceHQ recorded Sep 21, 2026	5,001-10,000	1,496 contacts →
	Exact match “Vulcain Engineering Group is a multi-specialist engineering and consulting group serving industrial companies across the globe, focused on critical sectors: energy, health…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
17	Weston Solutions, INC	Exact match	West Chester, PA, United StatesHQ recorded Sep 21, 2026	1,001-5,000	1,441 contacts →
	Exact match “Weston Solutions, Inc.(Weston) is a 100% employee-owned environmental and infrastructure services firm committed to safety and providing measurable client value.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
18	Partner Engineering & Science, INC	Exact match	Torrance, CA, United StatesHQ recorded Sep 21, 2026	1,001-5,000	1,358 contacts →
	Exact match “Partner Assessment Corp.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
19	RSK Group	Exact match	Helsby, United KingdomHQ recorded Sep 21, 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 21, 2026 · View company records in RevenueBase
20	Knight Piesold	Exact match	Denver, CO, United StatesHQ recorded Sep 21, 2026	1,001-5,000	1,231 contacts →
	Exact match “Knight Piésold is an employee-owned, global consulting firm providing specialist services to the mining, power, water resources, and infrastructure industries.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
21	DGE Danmark	Exact match	Højbjerg, DenmarkHQ recorded Sep 21, 2026	n/a	1,176 contacts →
	Exact match “Miljø er vores kernekompetence og vores ansvar.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
22	Verdantas	Exact match	Tampa, FL, United StatesHQ recorded Sep 21, 2026	1,001-5,000	1,139 contacts →
	Exact match “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.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
23	Apex Companies	Exact match	Rockville, MD, United StatesHQ recorded Sep 21, 2026	1,001-5,000	1,137 contacts →
	Exact match “Who is Apex?” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
24	Bge, INC	Exact match	Houston, TX, United StatesHQ recorded Sep 21, 2026	1,001-5,000	1,112 contacts →
	Exact match “Ranked No.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
25	Barr Engineering CO	Exact match	Minneapolis, MN, United StatesHQ recorded Sep 21, 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 21, 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 consultant companies”. 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 25,547 environmental consultant companies worldwide

See the full list, filter by size, metro and specialty, and access 116,720 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Environmental consultant companies worldwide at a glance

As of Sep 21, 2026

33.4%Verified-email coverage

13.7Average contacts per company

1-10Median size (employees)

1.5%Largest-city concentration · Sao Paulo

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

15,903

11-50

7,221

51-200

1,708

201-500

395

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 consultant companies are linked below.
What qualifies: Company records worldwide whose business descriptions match “environmental consultant companies” 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 116,720 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 21, 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 consultant companies by location

90 lists · largest first

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

How many environmental consultant companies are there worldwide?

RevenueBase identified 25,547 company matches for environmental consultant companies 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?

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

Which country has the most environmental consultant companies?

The United States leads with 4,532 companies, followed by Brazil (3,451) and the United Kingdom (1,134). Every environmental consultant companies list by country and city is linked on this page.

Which city has the most environmental consultant companies?

Sao Paulo leads with 384 company records, followed by Belo Horizonte (184) and Lima (165).

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 116,720 professional contacts with verified work emails tracked across these 25,547 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 21, 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.