Company lists · Data refreshed September 2026

Top 25 Environmental engineering staffing companies based in the United Kingdom

Name: Environmental engineering staffing companies based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 991 companies tracked

RevenueBase identified 991 environmental engineering staffing companies headquartered in the United Kingdom as of September 2026 and tracks 20,989 professional contacts across them, including 6,158 with verified work emails. London is the largest hub.

This list covers environmental engineering staffing companies headquartered in the United Kingdom, 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 28, 2026.

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 28, 2026 86% judged on-target in blind review

991Companies

20,989Contacts tracked

6,158Verified emails

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The 25 largest environmental engineering staffing companies based in the United Kingdom

Ranked by team size

Top 25 of 991 environmental engineering staffing companies based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to environmental engineering staffing 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	NES Fircroft	Strong evidence	Altrincham, United KingdomHQ checked Sep 28, 2026	1,001-5,000	2,951 contacts →
	Strong evidence “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…” Source: RevenueBase Database · checked Sep 28, 2026
2	RSK Group	Strong evidence	Helsby, United KingdomHQ checked Sep 28, 2026	10001+	1,255 contacts →
	Strong evidence “RSK Group is a global leader in the delivery of environmental and engineering solutions.” Source: RevenueBase Database · checked Sep 28, 2026
3	Matchtech	Indirect evidence	Whiteley, United KingdomHQ checked Sep 28, 2026	201-500	754 contacts →
	Indirect evidence “At Matchtech, we do more than recruit.” Source: RevenueBase Database · checked Sep 28, 2026
4	Ricardo PLC	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	1,001-5,000	670 contacts →
	Indirect evidence “Click the 'Follow' button and explore careers at Ricardo on our 'Jobs' and 'Life' tabs and at careers.ricardo.com.” Source: RevenueBase Database · checked Sep 28, 2026
5	Fircroft	Strong evidence	Warrington, United KingdomHQ checked Sep 28, 2026	501-1,000	589 contacts →
	Strong evidence “Fircroft is now part of the NES Fircroft group - the world’s leading engineering staffing provider spanning the Oil & Gas, Power & Renewables, Infrastructure, Life Sciences…” Source: RevenueBase Database · checked Sep 28, 2026
6	The Recruitment CO	Indirect evidence	Northampton, United KingdomHQ checked Sep 28, 2026	1,001-5,000	558 contacts →
	Indirect evidence “We’re THE RECRUITMENT Co.” Source: RevenueBase Database · checked Sep 28, 2026
7	Waterman Aspen	Indirect evidence	Chelmsford, United KingdomHQ checked Sep 28, 2026	501-1,000	506 contacts →
	Indirect evidence “Waterman Aspen welcomes engineers and technical specialists to make their mark on some of the biggest infrastructure projects across the UK on a secondment basis.” Source: RevenueBase Database · checked Sep 28, 2026
8	LVI Associates	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	1,001-5,000	494 contacts →
	Indirect evidence “Infrastructure plays a critical role in creating a future that works for everyone.” Source: RevenueBase Database · checked Sep 28, 2026
9	Fairhurst	Indirect evidence	Glasgow, United KingdomHQ checked Sep 28, 2026	201-500	437 contacts →
	Indirect evidence “Welcome to Fairhurst: Fairhurst is a Limited Liability Partnership (LLP) of Consulting Engineers practicing in the UK, employing circa 400 staff in 16 principal offices.” Source: RevenueBase Database · checked Sep 28, 2026
10	Mcginley Support Services Infrastructure LTD	Indirect evidence	Watford, United KingdomHQ checked Sep 28, 2026	51-200	435 contacts →
	Indirect evidence “McGinley Support Services is one of the UK’s largest specialist recruitment agencies providing the Infrastructure sector of the construction industry with permanent, contract and…” Source: RevenueBase Database · checked Sep 28, 2026
11	Ersg LTD	Partial evidence	Bromley, United KingdomHQ checked Sep 28, 2026	51-200	426 contacts →
	Partial evidence “ERSG \| Sourcing talent for a sustainable tomorrow ERSG has 15 offices around the world & is an award-winning international leader in recruitment and staffing services to the…” Source: RevenueBase Database · checked Sep 28, 2026
12	Shorterm Group	Partial evidence	Yiewsley, United KingdomHQ checked Sep 28, 2026	51-200	247 contacts →
	Partial evidence “The Shorterm Group provides specialist recruitment services and technical support for the engineering industry.” Source: RevenueBase Database · checked Sep 28, 2026
13	Jones Bros Civil Engineering UK	Indirect evidence	Ruthin, United KingdomHQ checked Sep 28, 2026	201-500	230 contacts →
	Indirect evidence “Established in the 1950s, Jones Bros’ leadership team consists of members of the second and third generations of the founding family.” Source: RevenueBase Database · checked Sep 28, 2026
14	QCS Staffing	Indirect evidence	Uk, United KingdomHQ checked Sep 28, 2026	51-200	227 contacts →
	Indirect evidence “We have been providing recruitment services to Life Sciences, Renewable Energy, Heavy Lift, Data Centre and IT clients in more than 30 countries since 1992.” Source: RevenueBase Database · checked Sep 28, 2026
15	The Erith Group	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	501-1,000	217 contacts →
	Partial evidence “Supported by a network of specialist consulting engineers, environmentalists and our own collective experience, our philosophy is simple: to provide a qualitative economic and…” Source: RevenueBase Database · checked Sep 28, 2026
16	HR Consultancy	Indirect evidence	Glasgow, United KingdomHQ checked Sep 28, 2026	n/a	190 contacts →
	Indirect evidence “Welcome to HRC Recruitment Looking for a job in Glasgow, Edinburgh or the rest of Scotland?” Source: RevenueBase Database · checked Sep 28, 2026
17	JURU	Strong evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	176 contacts →
	Strong evidence “Founded in 2015, Juru is an international engineering and consultancy firm with a mission to solve engineering and environmental problems.” Source: RevenueBase Database · checked Sep 28, 2026
18	MPI Limited	Indirect evidence	Hertford, United KingdomHQ checked Sep 28, 2026	n/a	174 contacts →
	Indirect evidence “For over 60 years, MPI has been connecting skilled people with industry, delivering recruitment, workforce solutions and project support to some of the UK's most demanding sectors.” Source: RevenueBase Database · checked Sep 28, 2026
19	Eden Brown Built Environment	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	157 contacts →
	Partial evidence “Placing specialists across the built environment arena - locally, nationally, expertly.” Source: RevenueBase Database · checked Sep 28, 2026
20	Thorn Baker Group	Indirect evidence	Nottingham, United KingdomHQ checked Sep 28, 2026	51-200	156 contacts →
	Indirect evidence “Thorn Baker Group is home to three specialist brands, Thorn Baker Construction, Thorn Baker Industrial Recruitment and Thorn Baker Estates, Facilities and Maintenance.” Source: RevenueBase Database · checked Sep 28, 2026
21	Earthstream Global	Indirect evidence	Bromley, United KingdomHQ checked Sep 28, 2026	51-200	148 contacts →
	Indirect evidence “Global Energy Recruitment Services - We source and select top talent across the renewable energy, power & grid and industrial technology sectors globally.” Source: RevenueBase Database · checked Sep 28, 2026
22	Navartis	Indirect evidence	Doncaster, United KingdomHQ checked Sep 28, 2026	51-200	141 contacts →
	Indirect evidence “Navartis is a specialist global recruitment company supplying highly skilled technical personnel to global projects across Technology, Energy and the Infrastructure & Built…” Source: RevenueBase Database · checked Sep 28, 2026
23	Caval LTD	Partial evidence	Leeds, United KingdomHQ checked Sep 28, 2026	51-200	137 contacts →
	Partial evidence “About Caval Founded in 2008, Caval has grown to become one of the UK’s market-leading construction and engineering recruitment specialists.” Source: RevenueBase Database · checked Sep 28, 2026
24	Bmsl Group	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	134 contacts →
	Indirect evidence “BMSL was formed in 1996 to provide specialist support to the construction industry.” Source: RevenueBase Database · checked Sep 28, 2026
25	RVT Group	Indirect evidence	Kent, United KingdomHQ checked Sep 28, 2026	51-200	128 contacts →
	Indirect evidence “RVT Group are not your average hire company, we work with you to understand the full scope of your activities on site before recommending a fully compliant health hazard control…” Source: RevenueBase Database · checked Sep 28, 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 staffing 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 staffing companies.
Partial evidence: Its own public description names part of environmental engineering staffing 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 staffing 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 991 environmental engineering staffing companies based in the United Kingdom

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Environmental engineering staffing companies based in the United Kingdom at a glance

As of Sep 28, 2026

29.3%Verified-email coverage

21.2Average contacts per company

1-10Median size (employees)

18.3%Largest-city concentration · London

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

598

11-50

273

51-200

201-500

501-1,000

1,001-5,000

10001+

Email recency for this list is measured worldwide rather than for United Kingdom, so it is reported there. Company counts and contact totals on this page are exact for United Kingdom, over 991 companies.

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 staffing 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.
What qualifies: Companies headquartered in the United Kingdom whose own description of what they do matches “environmental engineering staffing 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 staffing 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 staffing companies, and records with no verified work email. Companies headquartered outside United Kingdom are excluded even when they keep an office there.
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, 6,158 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 28, 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 staffing companies by metro

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 staffing 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 staffing companies are there based in the United Kingdom?

RevenueBase identified 991 environmental engineering staffing companies headquartered in the United Kingdom 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?

NES Fircroft, headquartered in Altrincham, tops this list with the largest team on record.

Which city has the most environmental engineering staffing companies?

London leads with 181 headquartered companies, followed by Manchester (34) and Leeds (24).

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 6,158 verified decision-maker contacts tracked across these 991 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 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 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.