Company lists · Data refreshed November 2026

Top 23 Environmental engineering staffing companies based in Ireland

RevenueBase identified 74 company matches for environmental engineering staffing companies associated with Ireland as of November 2026 and tracks 2,654 professional contacts across them, including 938 with verified work emails. Dublin is the largest hub.

This list covers company matches for environmental engineering staffing companies associated with Ireland, 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.

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
74Companies
2,654Contacts tracked
938Verified emails
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The 23 largest environmental engineering staffing companies based in Ireland

Ranked by team size
Top 23 of 74 company matches for environmental engineering staffing companies based in Ireland, 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.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchSandyford, IrelandHQ recorded Nov 5, 2026201-500254 contacts →

Exact match

“Roughan and O’Donovan (ROD) is a leading civil, environmental and structural engineering consultancy.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
2Exact matchDublin, IrelandHQ recorded Nov 5, 202651-200221 contacts →

Exact match

“Sigmar Recruitment established in 2002, is a leading Irish recruitment services company comprised of 14 specialist divisions covering the entire recruitment process and managed…”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
3Exact matchBlackrock, IrelandHQ recorded Nov 5, 202651-200171 contacts →

Exact match

“MWP is a multi-disciplinary Engineering and Environmental Consulting Practice providing a first class service to its clients since it was founded in 1967.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
4Exact matchCastlebar, IrelandHQ recorded Nov 5, 202651-200131 contacts →

Exact match

“Shareridge is a dynamic, modern and innovative civil engineering solutions specialist.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
5Exact matchCork, IrelandHQ recorded Nov 5, 202651-200123 contacts →

Exact match

“Fehily Timoney and Company is a Irish civil and environmental, engineering, scientific and planning consultancy specialising in the areas of Sustainable Infrastructure, Planning…”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
6Exact matchSligo, IrelandHQ recorded Nov 5, 202651-20094 contacts →

Exact match

“Jennings O’Donovan is a multidisciplinary consulting engineering firm specialising in renewable energy, water supply, wastewater treatment and in the provision of planning and…”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
7Exact matchLimerick, IrelandHQ recorded Nov 5, 202611-5078 contacts →

Exact match

“Unijobs is a recruitment company established for the purposes of providing a shared service designed to achieve efficiencies within the public sector.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
8Exact matchGalway, IrelandHQ recorded Nov 5, 202651-20076 contacts →

Exact match

“Ryan Hanley is a leading Engineering and Environmental Consultancy.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
9Exact matchBlackrock, IrelandHQ recorded Nov 5, 202651-20069 contacts →

Exact match

“Tandem is an engineering consultancy specialising in project management, multi-disciplined engineering design, construction management, energy & carbon reduction, EHS and talent…”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
10Exact matchDublin, IrelandHQ recorded Nov 5, 202651-20059 contacts →

Exact match

“We're part of ManpowerGroup – the world's workforce expert!@ManpowerIreland ManpowerGroup has been the world’s workforce recruitment and career development expert.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
11Exact matchDublin, IrelandHQ recorded Nov 5, 202611-5048 contacts →

Exact match

“Axiseng Consulting Engineers is a premier independent building services consulting engineering practice, founded in 2004 and celebrating 20 years of excellence in delivering…”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
12Exact matchDublin 12, IrelandHQ recorded Nov 5, 202611-5038 contacts →

Exact match

“Reliable, Flexible, Fast & Focused.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
13Exact matchRathcoole, IrelandHQ recorded Nov 5, 20261-1026 contacts →

Exact match

“KCM International Recruitment Email: info@kcmrecruitment.ie Phone: 00 353 1 4586006 Web: KCM is a privately owned Irish company established by industry qualified and experienced…”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
14Exact matchAshbourne, IrelandHQ recorded Nov 5, 20261-1022 contacts →

Exact match

“Protential Resources is a specialized recruitment agency based in Ireland, focusing on the industrial, logistics, and construction sectors.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
15Exact matchBalbriggan, IrelandHQ recorded Nov 5, 202651-20020 contacts →

Exact match

“Deena Energy Services is an Irish company with a global reach providing clients in the Energy and Oil & Gas industries with competent, focused and cost effective staffing…”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
16Exact matchIrelandHQ recorded Nov 5, 202611-5017 contacts →

Exact match

“Trusted partners, delivering top engineering, scientific & design talent to Ireland’s high-tech sectors.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
17Exact matchDublin, IrelandHQ recorded Nov 5, 202611-5017 contacts →

Exact match

“Helping build great companies since 1967” Established in 1967, Firstaff is one of the longest-established recruitment agencies in Ireland.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
18Exact matchCork, IrelandHQ recorded Nov 5, 202611-5016 contacts →

Exact match

“CDGA was founded in 1997.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
19Exact matchDublin, IrelandHQ recorded Nov 5, 202611-5013 contacts →

Exact match

“Doherty Finegan Kelly (DFK) Consulting Engineers are established Engineering Consultants and provide a comprehensive range of consultancy services specialising in all aspects of…”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
20Exact matchDouglas, IrelandHQ recorded Nov 5, 202611-509 contacts →

Exact match

“Walsh Design Group is an established firm of Consulting Engineers with offices in Cork and Dublin.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
21Exact matchIrelandHQ recorded Nov 5, 202651-2009 contacts →

Exact match

“J.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
22Exact matchEnnis, IrelandHQ recorded Nov 5, 20261-107 contacts →

Exact match

“Gaia Talent is a specialist consulting practice and our delivery team has over 35 years recruitment experience covering permanent (contingency and retained/search) and contract…”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
23Exact matchDublin 4, IrelandHQ recorded Nov 5, 20261-107 contacts →

Exact match

“Hall Recruitment was established in 2003, by Vivienne Hall & Catherine Murtagh.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase

Showing 23 of 74 environmental engineering staffing companies based in Ireland

See the full list, filter by size, metro and specialty, and access 938 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Environmental engineering staffing companies based in Ireland at a glance

As of Nov 5, 2026
35.3%Verified-email coverage
35.9Average contacts per company
1-10Median size (employees)
28.4%Largest-city concentration · Dublin
Nov 5, 2026Page data refreshed

Companies by employee count

1-10
37
11-50
19
51-200
14
201-500
2
501-1,000
1
1,001-5,000
1

Email recency for this list is measured worldwide rather than for Ireland, so it is reported there. Company counts and contact totals on this page are exact for Ireland, over 74 companies.

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.
What qualifies
Company records associated with Ireland 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. Where headquarters information is recorded, preview rows are also filtered to this page’s location. 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 938 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.

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 based in Ireland?

RevenueBase identified 74 company matches for environmental engineering staffing companies associated with Ireland 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?

Roughan & O'donovan tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most environmental engineering staffing companies?

Dublin leads with 21 company records, followed by Cork (5) and Galway (5).

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 938 professional contacts with verified work emails tracked across these 74 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.