Company lists · Data refreshed November 2026

Top 25 Water resources engineering staffing companies worldwide

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

Compiled by the RevenueBase Data Team Data refreshed Nov 5, 2026 7,314 companies tracked

RevenueBase identified 7,314 company matches for water resources engineering staffing companies worldwide as of November 2026 and tracks 265,607 professional contacts across them, including 92,939 with verified work emails. The United States is the largest market and London the largest hub.

This list covers company matches for water resources engineering staffing 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 November 5, 2026. Country and city lists for water resources engineering staffing 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 Nov 5, 2026 How this list was built

7,314Companies

265,607Contacts tracked

92,939Verified emails

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The 25 largest water resources engineering staffing companies worldwide

Ranked by team size

Top 25 of 7,314 company matches for water resources engineering staffing companies worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 5, 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	AECOM	Exact match	Dallas, TX, United StatesHQ recorded Nov 5, 2026	10001+	68,572 contacts →
	Exact match “AECOM is the global infrastructure leader, committed to delivering a better world.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
2	Tetra Tech	Exact match	Pasadena, CA, United StatesHQ recorded Nov 5, 2026	10001+	14,232 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 · Nov 5, 2026 · View company records in RevenueBase
3	CDM Smith	Exact match	Boston, MA, United StatesHQ recorded Nov 5, 2026	5,001-10,000	8,143 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 · Nov 5, 2026 · View company records in RevenueBase
4	Terracon	Exact match	Olathe, NE, United StatesHQ recorded Nov 5, 2026	5,001-10,000	6,576 contacts →
	Exact match “Terracon is a 100 percent employee-owned consulting engineering firm providing quality services to clients.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
5	WSP In India	Exact match	Noida, IndiaHQ recorded Nov 5, 2026	10001+	3,804 contacts →
	Exact match “We are one of the world’s leading professional services firms, uniting our engineering, advisory and science-based expertise to shape communities to advance humanity.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
6	Geosyntec Consultants	Exact match	Boca Raton, FL, United StatesHQ recorded Nov 5, 2026	1,001-5,000	2,553 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 · Nov 5, 2026 · View company records in RevenueBase
7	Brown And Caldwell	Exact match	Walnut Creek, CA, United StatesHQ recorded Nov 5, 2026	1,001-5,000	2,553 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 · Nov 5, 2026 · View company records in RevenueBase
8	Hazen And Sawyer	Exact match	New York, CO, United StatesHQ recorded Nov 5, 2026	1,001-5,000	2,306 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 · Nov 5, 2026 · View company records in RevenueBase
9	Civil & Environmental Consultants, INC	Exact match	Moon Township, MO, United StatesHQ recorded Nov 5, 2026	1,001-5,000	2,276 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 · Nov 5, 2026 · View company records in RevenueBase
10	Synergie Italia	Exact match	Turin, ItalyHQ recorded Nov 5, 2026	501-1,000	1,844 contacts →
	Exact match “L’Italia è piena di talenti: il nostro lavoro è riconoscerli!” Synergie Italia S.p.A.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
11	Carollo Engineers	Exact match	Walnut Creek, NV, United StatesHQ recorded Nov 5, 2026	1,001-5,000	1,837 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 · Nov 5, 2026 · View company records in RevenueBase
12	GEI Consultants, INC	Exact match	Woburn, MA, United StatesHQ recorded Nov 5, 2026	1,001-5,000	1,675 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
13	Freese And Nichols	Exact match	Fort Worth, TX, United StatesHQ recorded Nov 5, 2026	1,001-5,000	1,588 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 · Nov 5, 2026 · View company records in RevenueBase
14	Apex Companies	Exact match	Rockville, MD, United StatesHQ recorded Nov 5, 2026	1,001-5,000	1,321 contacts →
	Exact match “Who is Apex?” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
15	TRS Staffing Solutions	Exact match	Greenville, United StatesHQ recorded Nov 5, 2026	201-500	1,274 contacts →
	Exact match “TRS Staffing Solutions is a world leading engineering recruitment agency specialising in the recruitment and supply of professional, engineering, technical and field talent.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
16	Volkert, INC	Exact match	Mobile, AL, United StatesHQ recorded Nov 5, 2026	1,001-5,000	1,244 contacts →
	Exact match “Volkert’s history began in 1925 when it was founded in New Orleans as Doullut & Erwin to provide waterfront and heavy construction services, as well as airport design services…” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
17	Barr Engineering CO	Exact match	Minneapolis, NV, United StatesHQ recorded Nov 5, 2026	1,001-5,000	1,146 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 · Nov 5, 2026 · View company records in RevenueBase
18	Woodard & Curran	Exact match	Portland, ME, United StatesHQ recorded Nov 5, 2026	1,001-5,000	1,098 contacts →
	Exact match “Woodard & Curran is more than just a consulting firm – we are an employee-owned integrated science, engineering, design-build, and operations company specializing in water and…” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
19	GZA Geoenvironmental, INC	Exact match	Norwood, MA, United StatesHQ recorded Nov 5, 2026	501-1,000	922 contacts →
	Exact match “Founded in 1964 as a soils and foundations specialty consultant, GZA GeoEnvironmental, Inc.(GZA) has grown into a full-service company providing its clients with highly…” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
20	Klohn Crippen Berger	Exact match	Vancouver, NB, CanadaHQ recorded Nov 5, 2026	501-1,000	909 contacts →
	Exact match “KCB is a global engineering, geosciences, and environmental consulting firm driven by Passion, Integrity and a commitment to Excellence.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
21	NOVEC	Exact match	Sala El Jadida, MoroccoHQ recorded Nov 5, 2026	501-1,000	902 contacts →
	Exact match “Novec est le fruit de la fusion entre les sociétés Ingéma et Scet-Scom, dont CDG Développement est l’actionnaire de référence.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
22	Holding Company For Water And Waste Water Hcww	Exact match	Cairo, EgyptHQ recorded Nov 5, 2026	1,001-5,000	867 contacts →
	Exact match “Holding Company for Water and Waste Water is a Civil Engineering company located in Cairo Governorate, Egypt.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
23	DUDEK	Exact match	Encinitas, CA, United StatesHQ recorded Nov 5, 2026	501-1,000	829 contacts →
	Exact match “Dudek is an environmental, planning, and engineering consulting firm.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
24	Antea Group - France	Exact match	Olivet, FranceHQ recorded Nov 5, 2026	1,001-5,000	824 contacts →
	Exact match “Antea Group est une société internationale d’ingénierie et de conseil en environnement.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
25	Matchtech	Exact match	Whiteley, United KingdomHQ recorded Nov 5, 2026	201-500	809 contacts →
	Exact match “At Matchtech, we do more than recruit.” Recorded in the RevenueBase company graph · Nov 5, 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 “water resources engineering staffing 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 7,314 water resources engineering staffing companies worldwide

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Water resources engineering staffing companies worldwide at a glance

As of Nov 5, 2026

35.0%Verified-email coverage

36.3Average contacts per company

1-10Median size (employees)

1.7%Largest-city concentration · London

Nov 5, 2026Page data refreshed

Companies by employee count

1-10

3,755

11-50

2,201

51-200

852

201-500

252

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 water resources engineering staffing companies are linked below.
What qualifies: Company records worldwide whose business descriptions match “water resources engineering staffing 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 92,939 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 November 5, 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.

Water resources engineering staffing companies by location

38 lists · largest first

Every Water resources engineering staffing 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 “water resources engineering staffing companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many water resources engineering staffing companies are there worldwide?

RevenueBase identified 7,314 company matches for water resources engineering staffing companies worldwide as of November 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?

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

Which country has the most water resources engineering staffing companies?

The United States leads with 1,777 companies, followed by the United Kingdom (591) and Germany (347). Every water resources engineering staffing companies list by country and city is linked on this page.

Which city has the most water resources engineering staffing companies?

London leads with 125 company records, followed by Houston (57) and Sydney (54).

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 92,939 professional contacts with verified work emails tracked across these 7,314 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 November 5, 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.