Company lists · Data refreshed September 2026

Top 25 Plant engineering staffing companies based in Ireland

Name: Plant 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 29, 2026 72 companies tracked

RevenueBase identified 72 plant engineering staffing companies headquartered in Ireland as of September 2026 and tracks 1,656 professional contacts across them, including 418 with verified work emails. Dublin is the largest hub.

This list covers plant 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 29, 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 29, 2026 86% judged on-target in blind review

72Companies

1,656Contacts tracked

418Verified emails

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The 25 largest plant engineering staffing companies based in Ireland

Ranked by team size

Top 25 of 72 plant engineering staffing companies based in Ireland, ranked by team size, largest first. Data refreshed Sep 29, 2026. RevenueBase Smart Search rates how each company's information relates to plant 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	Shanahan Engineering	Partial evidence	Dun Laoghaire, IrelandHQ checked Sep 29, 2026	501-1,000	400 contacts →
	Partial evidence “Shanahan Engineering is a leading global energy services company.” Source: RevenueBase Database · checked Sep 29, 2026
2	Sigmar Recruitment	Indirect evidence	Dublin, IrelandHQ checked Sep 29, 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 29, 2026
3	Berkley Group	Partial evidence	Cork, IrelandHQ checked Sep 29, 2026	11-50	126 contacts →
	Partial evidence “Berkley Group is a Workforce Solutions provider deploying sector-specialist professionals into the world’s leading life science, pharmaceutical, engineering, and technology…” Source: RevenueBase Database · checked Sep 29, 2026
4	AA Euro Group	Indirect evidence	Waterford, IrelandHQ checked Sep 29, 2026	11-50	89 contacts →
	Indirect evidence “AA Euro Group are a specialist recruitment consultancy operating in a number of key locations across Europe in all sectors of industry, providing short and long-term labour hire…” Source: RevenueBase Database · checked Sep 29, 2026
5	BSS Building Staff Solutions	Indirect evidence	Dublin 8, IrelandHQ checked Sep 29, 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 29, 2026
6	Europlan Group	Partial evidence	Dublin, IrelandHQ checked Sep 29, 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 29, 2026
7	Manpowergroup Ireland	Indirect evidence	Dublin, IrelandHQ checked Sep 29, 2026	51-200	56 contacts →
	Indirect evidence “We're part of ManpowerGroup – the world's workforce expert!@ManpowerIreland ManpowerGroup has been the world’s workforce recruitment and career development expert.” Source: RevenueBase Database · checked Sep 29, 2026
8	PJ Personnel	Indirect evidence	Tuam, IrelandHQ checked Sep 29, 2026	11-50	36 contacts →
	Indirect evidence “PJ Personnel are specialists in recruiting temporary and permanent staff for the Construction, Industrial, Manufacturing and Commercial Sectors.” Source: RevenueBase Database · checked Sep 29, 2026
9	Sherlock Recruitment	Indirect evidence	Dublin 12, IrelandHQ checked Sep 29, 2026	11-50	36 contacts →
	Indirect evidence “Reliable, Flexible, Fast & Focused.” Source: RevenueBase Database · checked Sep 29, 2026
10	Headcount Solutions	Partial evidence	Balbriggan, IrelandHQ checked Sep 29, 2026	51-200	34 contacts →
	Partial evidence “Headcount Engineering is a multi-disciplined Engineering Resourcing company that provides high quality technical personnel and technical productivity solutions to the…” Source: RevenueBase Database · checked Sep 29, 2026
11	Connect Recruitment	Indirect evidence	Longford, IrelandHQ checked Sep 29, 2026	11-50	29 contacts →
	Indirect evidence “Connecting Talent.” Source: RevenueBase Database · checked Sep 29, 2026
12	O'neill & Brennan Ireland	Indirect evidence	Dublin, IrelandHQ checked Sep 29, 2026	51-200	28 contacts →
	Indirect evidence “Established in 1997, O’Neill & Brennan Ireland is a trusted recruitment partner to many of Ireland’s leading construction contractors.” Source: RevenueBase Database · checked Sep 29, 2026
13	Allpro Recruitment	Indirect evidence	Tullamore, IrelandHQ checked Sep 29, 2026	1-10	24 contacts →
	Indirect evidence “AllPro Recruitment is an award winning recruitment agency based in Tullamore serving the Irish midlands.” Source: RevenueBase Database · checked Sep 29, 2026
14	KCM Recruitment LTD	Indirect evidence	Rathcoole, IrelandHQ checked Sep 29, 2026	1-10	24 contacts →
	Indirect evidence “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…” Source: RevenueBase Database · checked Sep 29, 2026
15	Deena Energy	Partial evidence	Balbriggan, IrelandHQ checked Sep 29, 2026	51-200	22 contacts →
	Partial evidence “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…” Source: RevenueBase Database · checked Sep 29, 2026
16	Protential Resources	Indirect evidence	Ashbourne, IrelandHQ checked Sep 29, 2026	1-10	19 contacts →
	Indirect evidence “Protential Resources is a specialized recruitment agency based in Ireland, focusing on the industrial, logistics, and construction sectors.” Source: RevenueBase Database · checked Sep 29, 2026
17	Firstaff Personnel Consultants	Indirect evidence	Dublin, IrelandHQ checked Sep 29, 2026	11-50	19 contacts →
	Indirect evidence “Helping build great companies since 1967” Established in 1967, Firstaff is one of the longest-established recruitment agencies in Ireland.” Source: RevenueBase Database · checked Sep 29, 2026
18	Tower Plant & Civil Engineering	Strong evidence	Co. Offaly, IrelandHQ checked Sep 29, 2026	51-200	18 contacts →
	Strong evidence “Tower Plant & Civil Engineering is a construction company based out of Tower House, Clonminch, Tullamore, Co.” Source: RevenueBase Database · checked Sep 29, 2026
19	Dillon Engineering Services	Partial evidence	IrelandHQ checked Sep 29, 2026	11-50	16 contacts →
	Partial evidence “Trusted partners, delivering top engineering, scientific & design talent to Ireland’s high-tech sectors.” Source: RevenueBase Database · checked Sep 29, 2026
20	Pemcas	Strong evidence	Limerick, IrelandHQ checked Sep 29, 2026	11-50	13 contacts →
	Strong evidence “Pemcas - is a multidisciplinary engineering company providing a complete range of services for design & construction (delivery) of your facilities and plant.” Source: RevenueBase Database · checked Sep 29, 2026
21	Hamilton French	Indirect evidence	Cork, IrelandHQ checked Sep 29, 2026	51-200	12 contacts →
	Indirect evidence “No two clients are the same at Hamilton French, we offer a range of tailored solutions, from full-time recruitment, contract, and contract-to-hire assignments, to managed services…” Source: RevenueBase Database · checked Sep 29, 2026
22	Apex Global Resources	Indirect evidence	IrelandHQ checked Sep 29, 2026	1-10	11 contacts →
	Indirect evidence “In business since 2001, Apex Global Resources is a Professional Trades Recruitment Agency, providing permanent and contract recruitment solutions to the Mechanical Services…” Source: RevenueBase Database · checked Sep 29, 2026
23	Kenny-Whelan & Associates	Partial evidence	Ballincollig, IrelandHQ checked Sep 29, 2026	201-500	9 contacts →
	Partial evidence “Kenny-Whelan & Associates Engineering - Scientific - Technical Contract Jobs - Temporary Jobs – Permanent Jobs Since its formation in 1976, Kenny-Whelan has expanded its…” Source: RevenueBase Database · checked Sep 29, 2026
24	ISS Recruitment & HR Services	Indirect evidence	Naas, IrelandHQ checked Sep 29, 2026	11-50	8 contacts →
	Indirect evidence “Established in 2001 ISS Recruitment have since became one of the longest established recruitment firms in County Kildare.” Source: RevenueBase Database · checked Sep 29, 2026
25	Hall Recruitment	Indirect evidence	Dublin 4, IrelandHQ checked Sep 29, 2026	1-10	7 contacts →
	Indirect evidence “Hall Recruitment was established in 2003, by Vivienne Hall & Catherine Murtagh.” Source: RevenueBase Database · checked Sep 29, 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: plant 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 plant engineering staffing companies.
Partial evidence: Its own public description names part of plant 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 plant 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 72 plant engineering staffing companies based in Ireland

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Plant engineering staffing companies based in Ireland at a glance

As of Sep 29, 2026

25.2%Verified-email coverage

23.0Average contacts per company

1-10Median size (employees)

31.9%Largest-city concentration · Dublin

Sep 29, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

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 72 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 plant 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 “plant 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 plant 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 plant 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, 418 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 29, 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.

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 plant 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 plant engineering staffing companies are there based in Ireland?

RevenueBase identified 72 plant 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?

Shanahan Engineering, headquartered in Dun Laoghaire, tops this list with the largest team on record.

Which city has the most plant engineering staffing companies?

Dublin leads with 23 headquartered companies, followed by Cork (4) and Ashbourne (2).

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 418 verified decision-maker contacts tracked across these 72 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 29, 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.