Company lists · Data refreshed October 2026

Top 25 Groundwater engineering consultants worldwide

Name: Groundwater engineering consultants worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Oct 13, 2026 13,474 companies tracked

RevenueBase identified 13,474 company matches for groundwater engineering consultants worldwide as of October 2026 and tracks 264,581 professional contacts across them, including 94,106 with verified work emails. The United States is the largest market and Sao Paulo the largest hub.

This list covers company matches for groundwater engineering consultants 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 13, 2026. Country and city lists for groundwater engineering consultants 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 13, 2026 How this list was built

13,474Companies

264,581Contacts tracked

94,106Verified emails

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The 25 largest groundwater engineering consultants worldwide

Ranked by team size

Top 25 of 13,474 company matches for groundwater engineering consultants worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 13, 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 Oct 13, 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 13, 2026 · View company records in RevenueBase
2	Terracon	Exact match	Olathe, KS, United StatesHQ recorded Oct 13, 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 13, 2026 · View company records in RevenueBase
3	Keller	Exact match	London, United KingdomHQ recorded Oct 13, 2026	5,001-10,000	4,148 contacts →
	Exact match “Every day, people around the world live, work and play on ground prepared by Keller, the world's largest geotechnical specialist contractor.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
4	Golder	Exact match	Vancouver, BC, CanadaHQ recorded Oct 13, 2026	5,001-10,000	3,241 contacts →
	Exact match “Golder was acquired by WSP.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
5	Geosyntec Consultants	Exact match	Boca Raton, FL, United StatesHQ recorded Oct 13, 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 13, 2026 · View company records in RevenueBase
6	Brown And Caldwell	Exact match	Walnut Creek, CA, United StatesHQ recorded Oct 13, 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 13, 2026 · View company records in RevenueBase
7	Langan Engineering & Environmental Services	Exact match	Parsippany, NJ, United StatesHQ recorded Oct 13, 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 13, 2026 · View company records in RevenueBase
8	ECS Group Of Companies	Exact match	Chantilly, VA, United StatesHQ recorded Oct 13, 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 13, 2026 · View company records in RevenueBase
9	Providence	Exact match	Baton Rouge, LA, United StatesHQ recorded Oct 13, 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 13, 2026 · View company records in RevenueBase
10	Hazen And Sawyer	Exact match	New York, NY, United StatesHQ recorded Oct 13, 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 13, 2026 · View company records in RevenueBase
11	Civil & Environmental Consultants, INC	Exact match	Moon Township, PA, United StatesHQ recorded Oct 13, 2026	1,001-5,000	2,204 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 13, 2026 · View company records in RevenueBase
12	Carollo Engineers	Exact match	Walnut Creek, CA, United StatesHQ recorded Oct 13, 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 13, 2026 · View company records in RevenueBase
13	PER Aarsleff A S	Exact match	Dk-8260 Viby J, DenmarkHQ recorded Oct 13, 2026	5,001-10,000	1,804 contacts →
	Exact match “I Aarsleff-koncernen er vi drevet af ordentlighed.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
14	Swca Environmental Consultants	Exact match	Phoenix, AZ, United StatesHQ recorded Oct 13, 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 13, 2026 · View company records in RevenueBase
15	GEI Consultants, INC	Exact match	Woburn, MA, United StatesHQ recorded Oct 13, 2026	1,001-5,000	1,639 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
16	Freese And Nichols	Exact match	Fort Worth, TX, United StatesHQ recorded Oct 13, 2026	1,001-5,000	1,551 contacts →
	Exact match “Freese and Nichols is a professional planning, consulting and engineering firm serving clients across the United States.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
17	Weston Solutions, INC	Exact match	West Chester, PA, United StatesHQ recorded Oct 13, 2026	1,001-5,000	1,525 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 · Oct 13, 2026 · View company records in RevenueBase
18	DHI	Exact match	Hørsholm, DenmarkHQ recorded Oct 13, 2026	1,001-5,000	1,519 contacts →
	Exact match “There is no substitute for water.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
19	Knight Piesold	Exact match	Denver, CO, United StatesHQ recorded Oct 13, 2026	1,001-5,000	1,326 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 · Oct 13, 2026 · View company records in RevenueBase
20	Apex Companies	Exact match	Rockville, MD, United StatesHQ recorded Oct 13, 2026	1,001-5,000	1,266 contacts →
	Exact match “Who is Apex?” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
21	Verdantas	Exact match	Tampa, FL, United StatesHQ recorded Oct 13, 2026	1,001-5,000	1,252 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 · Oct 13, 2026 · View company records in RevenueBase
22	DGE Danmark	Exact match	Højbjerg, DenmarkHQ recorded Oct 13, 2026	n/a	1,171 contacts →
	Exact match “Miljø er vores kernekompetence og vores ansvar.” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
23	Barr Engineering CO	Exact match	Minneapolis, MN, United StatesHQ recorded Oct 13, 2026	1,001-5,000	1,108 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 · Oct 13, 2026 · View company records in RevenueBase
24	Trinity Consultants	Exact match	Dallas, TX, United StatesHQ recorded Oct 13, 2026	1,001-5,000	1,077 contacts →
	Exact match “Trinity Consultants is a global team of experts helping organizations solve complex challenges in environmental compliance, ecological protection, infrastructure performance, and…” Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
25	WSP Chile Y Argentina	Exact match	Vitacura, ChileHQ recorded Oct 13, 2026	10001+	1,057 contacts →
	Exact match “WSP en una empresa líder en servicios profesionales de consultoría en recursos hídricos, ingeniería, medio ambiente y sustentabilidad.” Recorded in the RevenueBase company graph · Oct 13, 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 “groundwater engineering consultants”. 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 13,474 groundwater engineering consultants worldwide

See the full list, filter by size, metro and specialty, and access 94,106 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Groundwater engineering consultants worldwide at a glance

As of Oct 13, 2026

35.6%Verified-email coverage

19.6Average contacts per company

1-10Median size (employees)

1.0%Largest-city concentration · Sao Paulo

Oct 13, 2026Page data refreshed

Companies by employee count

1-10

6,913

11-50

4,531

51-200

1,440

201-500

318

501-1,000

102

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 groundwater engineering consultants are linked below.
What qualifies: Company records worldwide whose business descriptions match “groundwater engineering consultants” 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 94,106 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 13, 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.

Groundwater engineering consultants by location

61 lists · largest first

Every Groundwater engineering consultants 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 “groundwater engineering consultants”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many groundwater engineering consultants are there worldwide?

RevenueBase identified 13,474 company matches for groundwater engineering consultants 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?

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

Which country has the most groundwater engineering consultants?

The United States leads with 2,293 companies, followed by Brazil (928) and the United Kingdom (754). Every groundwater engineering consultants list by country and city is linked on this page.

Which city has the most groundwater engineering consultants?

Sao Paulo leads with 131 company records, followed by Belo Horizonte (112) and Tehran (109).

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 94,106 professional contacts with verified work emails tracked across these 13,474 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 13, 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.