Company lists · Data refreshed October 2026

Top 25 Ecological engineering firms worldwide

Name: Ecological engineering firms worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Oct 11, 2026 15,980 companies tracked

RevenueBase identified 15,980 company matches for ecological engineering firms worldwide as of October 2026 and tracks 394,560 professional contacts across them, including 167,448 with verified work emails. The United States is the largest market and Sao Paulo the largest hub.

This list covers company matches for ecological engineering 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 11, 2026. Country and city lists for ecological engineering 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 11, 2026 How this list was built

15,980Companies

394,560Contacts tracked

167,448Verified emails

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The 25 largest ecological engineering firms worldwide

Ranked by team size

Top 25 of 15,980 company matches for ecological engineering firms worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 11, 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 11, 2026	10001+	29,839 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 11, 2026 · View company records in RevenueBase
2	Tetra Tech	Exact match	Pasadena, CA, United StatesHQ recorded Oct 11, 2026	10001+	13,725 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 11, 2026 · View company records in RevenueBase
3	WSP In The U.S	Exact match	New York, NY, United StatesHQ recorded Oct 11, 2026	10001+	10,184 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 11, 2026 · View company records in RevenueBase
4	CDM Smith	Exact match	Boston, MA, United StatesHQ recorded Oct 11, 2026	5,001-10,000	7,832 contacts →
	Exact match “CDM Smith is shaping what’s next, now, with world class solutions in water, environment, transportation and energy to public and private clients worldwide.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
5	Terracon	Exact match	Olathe, KS, United StatesHQ recorded Oct 11, 2026	5,001-10,000	6,380 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 11, 2026 · View company records in RevenueBase
6	JAN DE NUL Group	Exact match	Capellen, LuxembourgHQ recorded Oct 11, 2026	5,001-10,000	5,615 contacts →
	Exact match “We are World Builders shaping water, land and energy.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
7	Golder	Exact match	Vancouver, BC, CanadaHQ recorded Oct 11, 2026	5,001-10,000	3,241 contacts →
	Exact match “Golder was acquired by WSP.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
8	Geosyntec Consultants	Exact match	Boca Raton, FL, United StatesHQ recorded Oct 11, 2026	1,001-5,000	2,521 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 11, 2026 · View company records in RevenueBase
9	Brown And Caldwell	Exact match	Walnut Creek, CA, United StatesHQ recorded Oct 11, 2026	1,001-5,000	2,510 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 11, 2026 · View company records in RevenueBase
10	Langan Engineering & Environmental Services	Exact match	Parsippany, NJ, United StatesHQ recorded Oct 11, 2026	1,001-5,000	2,402 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 11, 2026 · View company records in RevenueBase
11	ECS Group Of Companies	Exact match	Chantilly, VA, United StatesHQ recorded Oct 11, 2026	1,001-5,000	2,259 contacts →
	Exact match “ECS Group of Companies is a Chantilly, VA-based consulting engineering firm.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
12	Providence	Exact match	Baton Rouge, LA, United StatesHQ recorded Oct 11, 2026	n/a	2,256 contacts →
	Exact match “Providence is an employee-owned engineering and environmental consulting firm.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
13	Hazen And Sawyer	Exact match	New York, NY, United StatesHQ recorded Oct 11, 2026	1,001-5,000	2,251 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 11, 2026 · View company records in RevenueBase
14	Olsson	Exact match	Lincoln, NE, United StatesHQ recorded Oct 11, 2026	1,001-5,000	2,229 contacts →
	Exact match “Olsson is an engineering firm made up of people who craft expert solutions and designs that improve communities.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
15	IMEG	Exact match	Rock Island, IL, United StatesHQ recorded Oct 11, 2026	1,001-5,000	2,064 contacts →
	Exact match “Leaders in Engineering and Innovation.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
16	Carollo Engineers	Exact match	Walnut Creek, CA, United StatesHQ recorded Oct 11, 2026	1,001-5,000	1,811 contacts →
	Exact match “For more than 90 years, Carollo Engineers has been dedicated exclusively to water and wastewater solutions.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
17	Bowman Consulting	Exact match	Reston, VA, United StatesHQ recorded Oct 11, 2026	1,001-5,000	1,778 contacts →
	Exact match “Headquartered in Reston, Virginia, Bowman is a national engineering services firm delivering infrastructure solutions to customers who own, develop and maintain the built…” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
18	Swca Environmental Consultants	Exact match	Phoenix, AZ, United StatesHQ recorded Oct 11, 2026	1,001-5,000	1,661 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 11, 2026 · View company records in RevenueBase
19	GEI Consultants, INC	Exact match	Woburn, MA, United StatesHQ recorded Oct 11, 2026	1,001-5,000	1,639 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
20	CRB	Exact match	Kansas City, MO, United StatesHQ recorded Oct 11, 2026	1,001-5,000	1,632 contacts →
	Exact match “CRB designs and builds the facilities that help bring life-enhancing therapies, critical medicines, and essential products to people around the world.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
21	Ulteig	Exact match	Fargo, ND, United StatesHQ recorded Oct 11, 2026	1,001-5,000	1,460 contacts →
	Exact match “Ulteig delivers comprehensive design engineering, program management and technical and field services that strengthen infrastructure vital to everyday life.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
22	Antea Group Nederland	Exact match	Heerenveen, NetherlandsHQ recorded Oct 11, 2026	1,001-5,000	1,439 contacts →
	Exact match “Antea Group is het thuis van 1800 trotse ingenieurs en adviseurs.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
23	Posco E&c	Exact match	United StatesHQ recorded Oct 11, 2026	5,001-10,000	1,382 contacts →
	Exact match “Construction & Engineering” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
24	Pennoni	Exact match	Philadelphia, PA, United StatesHQ recorded Oct 11, 2026	1,001-5,000	1,281 contacts →
	Exact match “Since our founding more than five decades ago, our clients trust Pennoni’s commitment to elevating the impact of projects on our communities.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
25	Apex Companies	Exact match	Rockville, MD, United StatesHQ recorded Oct 11, 2026	1,001-5,000	1,266 contacts →
	Exact match “Who is Apex?” Recorded in the RevenueBase company graph · Oct 11, 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 “ecological engineering 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 15,980 ecological engineering firms worldwide

See the full list, filter by size, metro and specialty, and access 167,448 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Ecological engineering firms worldwide at a glance

As of Oct 11, 2026

42.4%Verified-email coverage

24.7Average contacts per company

1-10Median size (employees)

0.9%Largest-city concentration · Sao Paulo

Oct 11, 2026Page data refreshed

Companies by employee count

1-10

8,651

11-50

5,122

51-200

1,514

201-500

375

501-1,000

117

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 ecological engineering firms are linked below.
What qualifies: Company records worldwide whose business descriptions match “ecological engineering 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 167,448 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 11, 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.

Ecological engineering firms by location

72 lists · largest first

Every Ecological engineering 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 “ecological engineering firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many ecological engineering firms are there worldwide?

RevenueBase identified 15,980 company matches for ecological engineering 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 ecological engineering firms?

The United States leads with 4,597 companies, followed by Brazil (1,385) and Canada (748). Every ecological engineering firms list by country and city is linked on this page.

Which city has the most ecological engineering firms?

Sao Paulo leads with 139 company records, followed by Belo Horizonte (80) and London (73).

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 167,448 professional contacts with verified work emails tracked across these 15,980 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 11, 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.