Company lists · Data refreshed September 2026

Top 25 Environmental engineering staffing companies worldwide

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

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 20,068 companies tracked

RevenueBase identified 20,068 company matches for environmental engineering staffing companies worldwide as of September 2026 and tracks 537,260 professional contacts across them, including 176,921 with verified work emails. The United States is the largest market and Houston the largest hub.

This list covers company matches for environmental 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 September 28, 2026. Country and city lists for environmental 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 Sep 28, 2026 How this list was built

20,068Companies

537,260Contacts tracked

176,921Verified emails

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The 25 largest environmental engineering staffing companies worldwide

Ranked by team size

Top 25 of 20,068 company matches for environmental engineering staffing companies worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 28, 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 Sep 28, 2026	10001+	28,416 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 · Sep 28, 2026 · View company records in RevenueBase
2	Tetra Tech	Exact match	Pasadena, CA, United StatesHQ recorded Sep 28, 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 28, 2026 · View company records in RevenueBase
3	CDM Smith	Exact match	Boston, MA, United StatesHQ recorded Sep 28, 2026	5,001-10,000	7,527 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 · Sep 28, 2026 · View company records in RevenueBase
4	Terracon	Exact match	Olathe, KS, United StatesHQ recorded Sep 28, 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 28, 2026 · View company records in RevenueBase
5	JAN DE NUL Group	Exact match	Capellen, LuxembourgHQ recorded Sep 28, 2026	5,001-10,000	5,424 contacts →
	Exact match “We are World Builders shaping water, land and energy.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
6	Michael Baker International	Exact match	Pittsburgh, PA, United StatesHQ recorded Sep 28, 2026	5,001-10,000	4,362 contacts →
	Exact match “Michael Baker International is a leading provider of engineering, consulting, and technology services spanning four Verticals: Infrastructure, Places and Facilities, Federal and…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
7	Spherion	Exact match	Atlanta, GA, United StatesHQ recorded Sep 28, 2026	10001+	4,263 contacts →
	Exact match “We’re Spherion-a staffing and recruiting pioneer that’s been driving careers and helping businesses grow for over 75 years.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
8	Select Staffing	Exact match	Atlanta, GA, United StatesHQ recorded Sep 28, 2026	10001+	3,934 contacts →
	Exact match “Select Staffing is a leading provider of temporary staffing and employment services in the U.S, with nationwide operations across multiple contingent staffing sectors.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
9	National Engineering Services Pakistan PVT Limited Nespak	Exact match	Lahore, PakistanHQ recorded Sep 28, 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 28, 2026 · View company records in RevenueBase
10	Beacon Hill	Exact match	Boston, MA, United StatesHQ recorded Sep 28, 2026	1,001-5,000	3,238 contacts →
	Exact match “Beacon Hill was founded to set a new standard in search, career placement and flexible staffing.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
11	Golder	Exact match	Vancouver, BC, CanadaHQ recorded Sep 28, 2026	5,001-10,000	3,167 contacts →
	Exact match “Golder was acquired by WSP.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
12	NES Fircroft	Exact match	Altrincham, United KingdomHQ recorded Sep 28, 2026	1,001-5,000	2,951 contacts →
	Exact match “With over 90 years’ combined experience of delivering workforce solutions to the global energy industry, NES Fircroft is proud to be the world’s leading engineering staffing…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
13	Brown And Caldwell	Exact match	Walnut Creek, CA, United StatesHQ recorded Sep 28, 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 28, 2026 · View company records in RevenueBase
14	Samsic Emploi	Exact match	Rennes, FranceHQ recorded Sep 28, 2026	5,001-10,000	2,454 contacts →
	Exact match “Samsic Emploi a été classée meilleure enseigne de travail temporaire par Capital, pour la 4ème année consécutive.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
15	Geosyntec Consultants	Exact match	Boca Raton, FL, United StatesHQ recorded Sep 28, 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 28, 2026 · View company records in RevenueBase
16	Providence	Exact match	Baton Rouge, LA, United StatesHQ recorded Sep 28, 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 28, 2026 · View company records in RevenueBase
17	ECS Group Of Companies	Exact match	Chantilly, VA, United StatesHQ recorded Sep 28, 2026	1,001-5,000	2,210 contacts →
	Exact match “ECS Group of Companies is a Chantilly, VA-based consulting engineering firm.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
18	Langan Engineering & Environmental Services	Exact match	Parsippany, NJ, United StatesHQ recorded Sep 28, 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 28, 2026 · View company records in RevenueBase
19	Civil & Environmental Consultants, INC	Exact match	Moon Township, PA, United StatesHQ recorded Sep 28, 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 28, 2026 · View company records in RevenueBase
20	Olsson	Exact match	Lincoln, NE, United StatesHQ recorded Sep 28, 2026	1,001-5,000	2,108 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 · Sep 28, 2026 · View company records in RevenueBase
21	Hazen And Sawyer	Exact match	New York, NY, United StatesHQ recorded Sep 28, 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 28, 2026 · View company records in RevenueBase
22	IMEG	Exact match	Rock Island, IL, United StatesHQ recorded Sep 28, 2026	1,001-5,000	1,985 contacts →
	Exact match “Leaders in Engineering and Innovation.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
23	Remedy Intelligent Staffing	Exact match	Atlanta, GA, United StatesHQ recorded Sep 28, 2026	10001+	1,948 contacts →
	Exact match “Remedy Intelligent Staffing is a nationwide professional staffing organization with more than 50 years of recruiting and selection expertise to match job candidates with positions…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
24	Englobe	Exact match	Québec, QC, CanadaHQ recorded Sep 28, 2026	1,001-5,000	1,852 contacts →
	Exact match “Englobe is a leader in the fields of engineering, gesosciences, environmental management, asset integrity and quality management.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
25	Synergie Italia	Exact match	Torino, ItalyHQ recorded Sep 28, 2026	501-1,000	1,748 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 · Sep 28, 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 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 20,068 environmental engineering staffing companies worldwide

See the full list, filter by size, metro and specialty, and access 176,921 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Environmental engineering staffing companies worldwide at a glance

As of Sep 28, 2026

32.9%Verified-email coverage

26.8Average contacts per company

11-50Median size (employees)

1.1%Largest-city concentration · Houston

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

9,402

11-50

6,309

51-200

2,776

201-500

841

501-1,000

316

1,001-5,000

275

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 engineering staffing companies are linked below.
What qualifies: Company records worldwide whose business descriptions match “environmental 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 176,921 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 28, 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 engineering staffing companies by location

98 lists · largest first

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

How many environmental engineering staffing companies are there worldwide?

RevenueBase identified 20,068 company matches for environmental engineering staffing 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?

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

Which country has the most environmental engineering staffing companies?

The United States leads with 6,324 companies, followed by Brazil (1,402) and the United Kingdom (991). Every environmental engineering staffing companies list by country and city is linked on this page.

Which city has the most environmental engineering staffing companies?

Houston leads with 215 company records, followed by London (193) and Sao Paulo (149).

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 176,921 professional contacts with verified work emails tracked across these 20,068 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 28, 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.