Company lists · Data refreshed September 2026

Top 25 Infrastructure engineering staffing companies based in Ireland

Name: Infrastructure engineering staffing companies based in Ireland
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 250 companies tracked

RevenueBase identified 250 infrastructure engineering staffing companies headquartered in Ireland as of September 2026 and tracks 9,088 professional contacts across them, including 3,745 with verified work emails. Dublin is the largest hub.

This list covers infrastructure engineering staffing companies headquartered in Ireland, 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

250Companies

9,088Contacts tracked

3,745Verified emails

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The 25 largest infrastructure engineering staffing companies based in Ireland

Ranked by team size

Top 25 of 250 infrastructure engineering staffing companies based in Ireland, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to infrastructure 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	Designer Group	Partial evidence	Dublin, IrelandHQ checked Sep 28, 2026	1,001-5,000	911 contacts →
	Partial evidence “Designer Group is a leading Irish-owned engineering contractor delivering projects across Energy & Industrial, Data Centres and Building Services.” Source: RevenueBase Database · checked Sep 28, 2026
2	Ward And Burke	Partial evidence	Kilcolgan, IrelandHQ checked Sep 28, 2026	1,001-5,000	632 contacts →
	Partial evidence “Since its establishment, Ward & Burke has sought to develop and adopt the ideals and aspirations to civil engineering construction and currently delivers class leading, reliable…” Source: RevenueBase Database · checked Sep 28, 2026
3	Coffey	Partial evidence	Athenry, IrelandHQ checked Sep 28, 2026	201-500	324 contacts →
	Partial evidence “Coffey is a family-owned civil engineering-led company operating in every major construction sector throughout Ireland and the UK.” Source: RevenueBase Database · checked Sep 28, 2026
4	Nicholas O'dwyer LTD	Partial evidence	Dublin, IrelandHQ checked Sep 28, 2026	201-500	284 contacts →
	Partial evidence “Nicholas O'Dwyer Ltd, Consulting Engineers, provide water engineering, environmental engineering and civil and structural engineering services to public and private sector clients.” Source: RevenueBase Database · checked Sep 28, 2026
5	O'connor Sutton Cronin	Partial evidence	Dublin, IrelandHQ checked Sep 28, 2026	201-500	241 contacts →
	Partial evidence “OCSC is an established International Multidisciplinary Consulting Engineering & Project Management Practice.” Source: RevenueBase Database · checked Sep 28, 2026
6	3d Personnel	Indirect evidence	Dublin, IrelandHQ checked Sep 28, 2026	51-200	237 contacts →
	Indirect evidence “Built on great people.” Source: RevenueBase Database · checked Sep 28, 2026
7	Roughan & O'donovan	Partial evidence	Sandyford, IrelandHQ checked Sep 28, 2026	201-500	227 contacts →
	Partial evidence “Roughan and O’Donovan (ROD) is a leading civil, environmental and structural engineering consultancy.” Source: RevenueBase Database · checked Sep 28, 2026
8	Sigmar Recruitment	Indirect evidence	Dublin, IrelandHQ checked Sep 28, 2026	51-200	202 contacts →
	Indirect evidence “Sigmar Recruitment established in 2002, is a leading Irish recruitment services company comprised of 14 specialist divisions covering the entire recruitment process and managed…” Source: RevenueBase Database · checked Sep 28, 2026
9	Dbfl Consulting Engineers LTD	Strong evidence	Dublin, IrelandHQ checked Sep 28, 2026	51-200	178 contacts →
	Strong evidence “DBFL is a fully Irish-owned firm specializing in the planning, engineering design and delivery within the property, infrastructure, environmental & energy sectors.” Source: RevenueBase Database · checked Sep 28, 2026
10	MWP	Partial evidence	Blackrock, IrelandHQ checked Sep 28, 2026	51-200	160 contacts →
	Partial evidence “MWP is a multi-disciplinary Engineering and Environmental Consulting Practice providing a first class service to its clients since it was founded in 1967.” Source: RevenueBase Database · checked Sep 28, 2026
11	Egis In Ireland	Partial evidence	Dundrum Road, IrelandHQ checked Sep 28, 2026	501-1,000	143 contacts →
	Partial evidence “Egis is a leading global architectural, consulting, construction engineering, operations and mobility services firm.” Source: RevenueBase Database · checked Sep 28, 2026
12	Secto Services Limited	Strong evidence	Maynooth, IrelandHQ checked Sep 28, 2026	201-500	136 contacts →
	Strong evidence “Delivering Successful Engineering and Technical Services Secto Services is a fast growing Infrastructure build and engineering solutions company where customer service and the…” Source: RevenueBase Database · checked Sep 28, 2026
13	Whitewater Group	Partial evidence	Naas, IrelandHQ checked Sep 28, 2026	201-500	131 contacts →
	Partial evidence “Whitewater Group is a multi-disciplinary engineering company with water at the heart of everything we do.” Source: RevenueBase Database · checked Sep 28, 2026
14	Ward Personnel	Indirect evidence	Cork, IrelandHQ checked Sep 28, 2026	11-50	119 contacts →
	Indirect evidence “Ward Personnel is an award-winning recruitment agency with offices in Dublin, Cork, Poland, and Denmark.” Source: RevenueBase Database · checked Sep 28, 2026
15	Gdcl Consulting Engineers	Partial evidence	Dublin 12, IrelandHQ checked Sep 28, 2026	11-50	116 contacts →
	Partial evidence “From original inception in 1991, GDCL Consulting Engineers have evolved as a provider of civil and structural engineering services with a proven track record of successful…” Source: RevenueBase Database · checked Sep 28, 2026
16	Punch Consulting Engineers	Partial evidence	Limerick, IrelandHQ checked Sep 28, 2026	51-200	105 contacts →
	Partial evidence “PUNCH Consulting Engineers is the business name of Michael Punch and Partners Limited and is one of Ireland's leading + most experienced engineering consultancies.” Source: RevenueBase Database · checked Sep 28, 2026
17	Jons Civil Engineering Company LTD	Indirect evidence	Carranstown (duleek), IrelandHQ checked Sep 28, 2026	51-200	103 contacts →
	Indirect evidence “JCEL have been in operation since 1983.” Source: RevenueBase Database · checked Sep 28, 2026
18	Clifton Scannell Emerson Associates	Indirect evidence	Dun Laoghaire, IrelandHQ checked Sep 28, 2026	51-200	92 contacts →
	Indirect evidence “Clifton Scannell Emerson Associates Clifton Scannell Emerson Associates (CSEA) are an Irish firm of Civil and Structural Consulting Engineers, with over seventy years’ experience…” Source: RevenueBase Database · checked Sep 28, 2026
19	Oradeo	Indirect evidence	Dublin 24, IrelandHQ checked Sep 28, 2026	201-500	82 contacts →
	Indirect evidence “Oradeo provides high quality expert recruitment services to our clients throughout Ireland, Europe and Internationally.” Source: RevenueBase Database · checked Sep 28, 2026
20	Barrett Mahony Consulting Engineers	Partial evidence	Dublin 2, IrelandHQ checked Sep 28, 2026	51-200	79 contacts →
	Partial evidence “Barrett Mahony Consulting Engineers is an established civil and structural engineering consultancy specialising in all aspects of civil and structural engineering and project…” Source: RevenueBase Database · checked Sep 28, 2026
21	BSS Building Staff Solutions	Indirect evidence	Dublin 8, IrelandHQ checked Sep 28, 2026	51-200	78 contacts →
	Indirect evidence “The Right People For The Job Established in 2005, Building Staff Solutions (BSS) is one of Ireland’s leading outsourced solutions provider and recruitment specialists.” Source: RevenueBase Database · checked Sep 28, 2026
22	Europlan Group	Partial evidence	Dublin, IrelandHQ checked Sep 28, 2026	51-200	77 contacts →
	Partial evidence “For over four decades, the Europlan Group has been a trusted partner, delivering exceptional services to the Engineering and Industrial sectors worldwide.” Source: RevenueBase Database · checked Sep 28, 2026
23	Prochem Engineering	Partial evidence	Kilkenny, IrelandHQ checked Sep 28, 2026	51-200	75 contacts →
	Partial evidence “Prochem Engineering is one of the leading engineering consultancy firms in Ireland, having been established in 1995.” Source: RevenueBase Database · checked Sep 28, 2026
24	Unijobs	Indirect evidence	Limerick, IrelandHQ checked Sep 28, 2026	11-50	73 contacts →
	Indirect evidence “Unijobs is a recruitment company established for the purposes of providing a shared service designed to achieve efficiencies within the public sector.” Source: RevenueBase Database · checked Sep 28, 2026
25	Richard Nolan Civil Engineering	Partial evidence	Tallaght, IrelandHQ checked Sep 28, 2026	51-200	71 contacts →
	Partial evidence “Richard Nolan Civil Engineering is at the heart of the Irish civil engineering and utilities ducting industry delivering the highest quality solution in the safest manner.” 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: infrastructure 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 infrastructure engineering staffing companies.
Partial evidence: Its own public description names part of infrastructure 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 infrastructure 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 250 infrastructure engineering staffing companies based in Ireland

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Infrastructure engineering staffing companies based in Ireland at a glance

As of Sep 28, 2026

41.2%Verified-email coverage

36.4Average contacts per company

11-50Median size (employees)

18.8%Largest-city concentration · Dublin

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

10001+

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 250 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 infrastructure 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 Ireland whose own description of what they do matches “infrastructure 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 infrastructure 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 infrastructure engineering staffing companies, and records with no verified work email. Companies headquartered outside Ireland 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, 3,745 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.

Infrastructure engineering staffing companies by metro

Infrastructure engineering staffing companies in Dublin47

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 infrastructure 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 infrastructure engineering staffing companies are there based in Ireland?

RevenueBase identified 250 infrastructure engineering staffing companies headquartered in Ireland 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?

Designer Group, headquartered in Dublin, tops this list with the largest team on record.

Which city has the most infrastructure engineering staffing companies?

Dublin leads with 47 headquartered companies, followed by Cork (12) and Limerick (9).

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 3,745 verified decision-maker contacts tracked across these 250 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.