Company lists · Data refreshed September 2026

Top 25 Environmental engineering companies worldwide

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

Compiled by the RevenueBase Data Team Data refreshed Sep 15, 2026 15,809 companies tracked

RevenueBase identified 15,809 environmental engineering companies worldwide as of September 2026 and tracks 455,109 professional contacts across them, including 164,879 with verified work emails and 0 with mobile numbers. The United States is the largest market and Sao Paulo the largest hub.

This list covers environmental engineering companies 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 15, 2026. Country and city lists for environmental engineering companies 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 15, 2026 86% judged on-target in blind review

15,809Companies

455,109Contacts tracked

164,879Verified emails

0Mobile numbers

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The 25 largest environmental engineering companies worldwide

Ranked by team size

Top 25 of 15,809 environmental engineering companies worldwide, ranked by team size, largest first. Data refreshed Sep 15, 2026. RevenueBase Smart Search rates how each company's information relates to environmental engineering companies: 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	Veolia	Partial evidence	Aubervilliers, FranceHQ checked Sep 15, 2026	10001+	30,019 contacts →
	Partial evidence “Veolia, a global leader in environmental services, works every day to build environmental security for the benefit of public health and the competitiveness of industries and…” Source: RevenueBase Database · checked Sep 15, 2026
2	Stantec	Indirect evidence	Edmonton, AB, CanadaHQ checked Sep 15, 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 15, 2026
3	Tetra Tech	Strong evidence	Pasadena, CA, United StatesHQ checked Sep 15, 2026	10001+	12,999 contacts →
	Strong evidence “Tetra Tech is the leader in water, environment and sustainable infrastructure, providing high-end technical and engineering services for projects worldwide.” Source: RevenueBase Database · checked Sep 15, 2026
4	CDM Smith	Partial evidence	Boston, MA, United StatesHQ checked Sep 15, 2026	5,001-10,000	7,527 contacts →
	Partial evidence “CDM Smith is shaping what’s next, now, with world class solutions in water, environment, transportation and energy to public and private clients worldwide.” Source: RevenueBase Database · checked Sep 15, 2026
5	Terracon	Partial evidence	Olathe, KS, United StatesHQ checked Sep 15, 2026	5,001-10,000	6,113 contacts →
	Partial evidence “Terracon is a 100 percent employee-owned consulting engineering firm providing quality services to clients.” Source: RevenueBase Database · checked Sep 15, 2026
6	ION Exchange India LTD	Partial evidence	Mumbai, IndiaHQ checked Sep 15, 2026	1,001-5,000	3,810 contacts →
	Partial evidence “At Ion Exchange India, we bring you total environment solutions - water treatment, liquid waste treatment & recycle, air pollution control, solid & hazardous waste management and…” Source: RevenueBase Database · checked Sep 15, 2026
7	Golder	Indirect evidence	Vancouver, BC, CanadaHQ checked Sep 15, 2026	5,001-10,000	3,167 contacts →
	Indirect evidence “Golder was acquired by WSP.” Source: RevenueBase Database · checked Sep 15, 2026
8	Toyo Engineering Corporation	Partial evidence	Chiba-shi Mihama-ku, JapanHQ checked Sep 15, 2026	1,001-5,000	2,760 contacts →
	Partial evidence “Toyo Engineering is an engineering company that constructs the plant in a global stage centering on the plant engineering field.” Source: RevenueBase Database · checked Sep 15, 2026
9	NIRAS	Indirect evidence	Allerød, DenmarkHQ checked Sep 15, 2026	1,001-5,000	2,699 contacts →
	Indirect evidence “At NIRAS, we engineer solutions for a shared future.” Source: RevenueBase Database · checked Sep 15, 2026
10	APTIM	Partial evidence	Baton Rouge, LA, United StatesHQ checked Sep 15, 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 15, 2026
11	Veolia Australia & NEW Zealand	Partial evidence	Pyrmont, AustraliaHQ checked Sep 15, 2026	5,001-10,000	2,476 contacts →
	Partial evidence “Veolia Australia and New Zealand is a leading provider of environmental solutions across water and wastewater services, industrial cleaning, waste management and resource recovery…” Source: RevenueBase Database · checked Sep 15, 2026
12	Brown And Caldwell	Indirect evidence	Walnut Creek, CA, United StatesHQ checked Sep 15, 2026	1,001-5,000	2,473 contacts →
	Indirect evidence “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.” Source: RevenueBase Database · checked Sep 15, 2026
13	Geosyntec Consultants	Strong evidence	Boca Raton, FL, United StatesHQ checked Sep 15, 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 15, 2026
14	Providence	Strong evidence	Baton Rouge, LA, United StatesHQ checked Sep 15, 2026	n/a	2,232 contacts →
	Strong evidence “Providence is an employee-owned engineering and environmental consulting firm.” Source: RevenueBase Database · checked Sep 15, 2026
15	ECS Group Of Companies	Partial evidence	Chantilly, VA, United StatesHQ checked Sep 15, 2026	1,001-5,000	2,210 contacts →
	Partial evidence “ECS Group of Companies is a Chantilly, VA-based consulting engineering firm.” Source: RevenueBase Database · checked Sep 15, 2026
16	Langan Engineering & Environmental Services	Partial evidence	Parsippany, NJ, United StatesHQ checked Sep 15, 2026	1,001-5,000	2,177 contacts →
	Partial evidence “Langan's client-focused, highly entrepreneurial culture cultivates an environment of opportunities in which career growth and teamwork flourish.” Source: RevenueBase Database · checked Sep 15, 2026
17	Civil & Environmental Consultants, INC	Partial evidence	Moon Township, PA, United StatesHQ checked Sep 15, 2026	1,001-5,000	2,145 contacts →
	Partial 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 15, 2026
18	Olsson	Partial evidence	Lincoln, NE, United StatesHQ checked Sep 15, 2026	1,001-5,000	2,108 contacts →
	Partial evidence “Olsson is an engineering firm made up of people who craft expert solutions and designs that improve communities.” Source: RevenueBase Database · checked Sep 15, 2026
19	Hazen And Sawyer	Indirect evidence	New York, NY, United StatesHQ checked Sep 15, 2026	1,001-5,000	2,100 contacts →
	Indirect evidence “As Hazen marks 75 years, we celebrate a legacy of absolute commitment to our clients while delivering the best technical work available anywhere.” Source: RevenueBase Database · checked Sep 15, 2026
20	IMEG	Partial evidence	Rock Island, IL, United StatesHQ checked Sep 15, 2026	1,001-5,000	1,985 contacts →
	Partial evidence “Leaders in Engineering and Innovation.” Source: RevenueBase Database · checked Sep 15, 2026
21	Burns & Mcdonnell India	Indirect evidence	Vikhroli West, IndiaHQ checked Sep 15, 2026	1,001-5,000	1,724 contacts →
	Indirect evidence “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…” Source: RevenueBase Database · checked Sep 15, 2026
22	Carollo Engineers	Indirect evidence	Walnut Creek, CA, United StatesHQ checked Sep 15, 2026	1,001-5,000	1,718 contacts →
	Indirect evidence “For more than 90 years, Carollo Engineers has been dedicated exclusively to water and wastewater solutions.” Source: RevenueBase Database · checked Sep 15, 2026
23	Binladin Contracting Group	Indirect evidence	Dubai, United Arab EmiratesHQ checked Sep 15, 2026	5,001-10,000	1,679 contacts →
	Indirect evidence “Binladin Contracting Group (BCG) is a UAE based construction company that serves Public and Semi-Governmental Sectors since 1967.” Source: RevenueBase Database · checked Sep 15, 2026
24	Bowman Consulting	Partial evidence	Reston, VA, United StatesHQ checked Sep 15, 2026	1,001-5,000	1,666 contacts →
	Partial evidence “Headquartered in Reston, Virginia, Bowman is a national engineering services firm delivering infrastructure solutions to customers who own, develop and maintain the built…” Source: RevenueBase Database · checked Sep 15, 2026
25	Swca Environmental Consultants	Partial evidence	Phoenix, AZ, United StatesHQ checked Sep 15, 2026	1,001-5,000	1,629 contacts →
	Partial 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 15, 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 engineering companies. 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 engineering companies.
Partial evidence: Its own public description names part of environmental engineering companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name environmental engineering companies. 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 15,809 environmental engineering companies worldwide

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Environmental engineering companies worldwide at a glance

As of Sep 15, 2026

36.2%Verified-email coverage

28.8Average contacts per company

11-50Median size (employees)

1.6%Largest-city concentration · Sao Paulo

Sep 15, 2026Page data refreshed

Companies by employee count

1-10

7,837

11-50

5,364

51-200

1,754

201-500

445

501-1,000

144

1,001-5,000

134

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 engineering companies, 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: 45 countries, largest first: the United States, Brazil, India, Italy, Canada, Germany, France, Spain, the United Kingdom, Türkiye and 35 more. Country and city lists for environmental engineering companies are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “environmental engineering companies”. 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 engineering companies), 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 engineering companies, 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, 164,879 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 15, 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 engineering companies by location

75 lists · largest first

Every Environmental engineering 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 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 engineering companies, 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 engineering companies are there worldwide?

RevenueBase identified 15,809 environmental engineering companies 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?

Veolia, headquartered in Aubervilliers, tops this list with the largest team on record.

Which country has the most environmental engineering companies?

The United States leads with 3,898 companies, followed by Brazil (2,541) and India (868). Every environmental engineering companies list by country and city is linked on this page.

Which city has the most environmental engineering companies?

Sao Paulo leads with 257 headquartered companies, followed by Belo Horizonte (131) and Rio De Janeiro (104).

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 164,879 verified decision-maker contacts tracked across these 15,809 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 15, 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.