Company lists · Data refreshed September 2026

Top 25 Infrastructure conglomerates based in Ireland

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

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 66 companies tracked

RevenueBase identified 66 infrastructure conglomerates headquartered in Ireland as of September 2026 and tracks 11,937 professional contacts across them, including 3,535 with verified work emails. Dublin is the largest hub.

This list covers infrastructure conglomerates 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 20, 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 20, 2026 86% judged on-target in blind review

66Companies

11,937Contacts tracked

3,535Verified emails

Explore this list → Free signup · no credit card · 500 free credits

The 25 largest infrastructure conglomerates based in Ireland

Ranked by team size

Top 25 of 66 infrastructure conglomerates based in Ireland, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to infrastructure conglomerates: 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	CRH	Partial evidence	Dublin, IrelandHQ checked Sep 20, 2026	10001+	3,600 contacts →
	Partial evidence “CRH (NYSE: CRH) is the leading provider of building materials critical to modernizing infrastructure.” Source: RevenueBase Database · checked Sep 20, 2026
2	Mercury	Indirect evidence	Dublin, IrelandHQ checked Sep 20, 2026	1,001-5,000	2,418 contacts →
	Indirect evidence “Mercury is the European leader in construction solutions.” Source: RevenueBase Database · checked Sep 20, 2026
3	Designer Group	Indirect evidence	Dublin, IrelandHQ checked Sep 20, 2026	1,001-5,000	911 contacts →
	Indirect 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 20, 2026
4	Ward And Burke	Indirect evidence	Kilcolgan, IrelandHQ checked Sep 20, 2026	1,001-5,000	632 contacts →
	Indirect 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 20, 2026
5	Coffey	Indirect evidence	Athenry, IrelandHQ checked Sep 20, 2026	201-500	324 contacts →
	Indirect 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 20, 2026
6	GMC Utilities Group	Indirect evidence	Ballycoolin, IrelandHQ checked Sep 20, 2026	501-1,000	291 contacts →
	Indirect evidence “The GMC Utilities Group, comprising GMC Civil and Mechanical Engineering Ltd, Gerry McCloskey(Irl) Ltd, Gas Management Resources Limited and Meter Technology Ireland Ltd provide a…” Source: RevenueBase Database · checked Sep 20, 2026
7	Nicholas O'dwyer LTD	Indirect evidence	Dublin, IrelandHQ checked Sep 20, 2026	201-500	284 contacts →
	Indirect 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 20, 2026
8	Fingleton White	Indirect evidence	Portlaoise, IrelandHQ checked Sep 20, 2026	201-500	175 contacts →
	Indirect evidence “Fingleton White is a leading provider of multidisciplinary engineering services, delivering innovative solutions to utility owners and large energy users across the Energy, Water…” Source: RevenueBase Database · checked Sep 20, 2026
9	Egis In Ireland	Indirect evidence	Dundrum Road, IrelandHQ checked Sep 20, 2026	501-1,000	143 contacts →
	Indirect evidence “Egis is a leading global architectural, consulting, construction engineering, operations and mobility services firm.” Source: RevenueBase Database · checked Sep 20, 2026
10	Secto Services Limited	Partial evidence	Maynooth, IrelandHQ checked Sep 20, 2026	201-500	136 contacts →
	Partial 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 20, 2026
11	Whitewater Group	Indirect evidence	Naas, IrelandHQ checked Sep 20, 2026	201-500	131 contacts →
	Indirect evidence “Whitewater Group is a multi-disciplinary engineering company with water at the heart of everything we do.” Source: RevenueBase Database · checked Sep 20, 2026
12	Siac Construction LTD	Indirect evidence	Dublin, IrelandHQ checked Sep 20, 2026	201-500	107 contacts →
	Indirect evidence “Founded in 1913, SIAC's business has grown through our reputation for delivering quality projects that always meet and often exceed our clients' expectations.” Source: RevenueBase Database · checked Sep 20, 2026
13	Punch Consulting Engineers	Indirect evidence	Limerick, IrelandHQ checked Sep 20, 2026	51-200	105 contacts →
	Indirect 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 20, 2026
14	Shay Murtagh Precast LTD	Indirect evidence	Mullingar, IrelandHQ checked Sep 20, 2026	201-500	94 contacts →
	Indirect evidence “Shay Murtagh Precast is a market leader in the field of precast concrete solutions.” Source: RevenueBase Database · checked Sep 20, 2026
15	Richard Nolan Civil Engineering	Indirect evidence	Tallaght, IrelandHQ checked Sep 20, 2026	51-200	71 contacts →
	Indirect 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 20, 2026
16	CHM Group	Partial evidence	IrelandHQ checked Sep 20, 2026	51-200	53 contacts →
	Partial evidence “For over 20 years, we have been at the forefront of the Country’s largest transport and infrastructure projects, including the construction of the M50, Terminal 2 at Dublin…” Source: RevenueBase Database · checked Sep 20, 2026
17	Carey Building Contractors	Indirect evidence	Galway, IrelandHQ checked Sep 20, 2026	51-200	32 contacts →
	Indirect evidence “Established in 1998, by Paul Carey, Carey Building Contractors are based in Liosban Business Park, Tuam Road, Galway.” Source: RevenueBase Database · checked Sep 20, 2026
18	Rubicon Capital Advisors	Partial evidence	Dublin, IrelandHQ checked Sep 20, 2026	11-50	31 contacts →
	Partial evidence “Rubicon is one of the world’s leading investment banking firms focused solely on the infrastructure, energy & utilities sectors.” Source: RevenueBase Database · checked Sep 20, 2026
19	Niaron Limited	Indirect evidence	Foynes, IrelandHQ checked Sep 20, 2026	51-200	22 contacts →
	Indirect evidence “Welcome to Niaron Ltd.” Source: RevenueBase Database · checked Sep 20, 2026
20	EJ In Ireland	Indirect evidence	Birr, IrelandHQ checked Sep 20, 2026	1,001-5,000	21 contacts →
	Indirect evidence “We are leaders in the design, manufacture, and distribution of access solutions for water, sewer, drainage, telecommunications, and utility networks.” Source: RevenueBase Database · checked Sep 20, 2026
21	ABM Europe	Indirect evidence	Swords, IrelandHQ checked Sep 20, 2026	51-200	21 contacts →
	Indirect evidence “ABM Europe is a well established and successful Construction and Civil Engineering Company, present in Ireland, UK, Czech Republic, Poland, Slovakia, Romania, Bulgaria and the…” Source: RevenueBase Database · checked Sep 20, 2026
22	Glas Civil Engineering LTD	Indirect evidence	Kilheffernan, IrelandHQ checked Sep 20, 2026	51-200	18 contacts →
	Indirect evidence “Introduction Glas Civil Engineering Ltd was founded in 2013 with the mission of delivering top-quality service to our clients.” Source: RevenueBase Database · checked Sep 20, 2026
23	Mcginty & O'shea LTD	Indirect evidence	Cork, IrelandHQ checked Sep 20, 2026	51-200	14 contacts →
	Indirect evidence “McGinty & O’Shea Ltd.(Building & Civil Engineering Contractors) operates across the many diverse sectors of the Irish construction industry.” Source: RevenueBase Database · checked Sep 20, 2026
24	Donnelly Civil Engineering LTD	Indirect evidence	Leinster, IrelandHQ checked Sep 20, 2026	11-50	13 contacts →
	Indirect evidence “Donnelly Civil Engineering Ltd.(DCEL) is a startup business which commenced trading in 2022, founded by three brothers, Alan, Rory and Hugh Donnelly.” Source: RevenueBase Database · checked Sep 20, 2026
25	Murphy Ireland	Partial evidence	IrelandHQ checked Sep 20, 2026	501-1,000	13 contacts →
	Partial evidence “Over the past 55 years, Murphy Ireland has built a reputation for quality and excellence, offering industry-leading services in transportation, infrastructure, energy, structural…” Source: RevenueBase Database · checked Sep 20, 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 conglomerates. 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 conglomerates.
Partial evidence: Its own public description names part of infrastructure conglomerates, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name infrastructure conglomerates. 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 66 infrastructure conglomerates based in Ireland

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 3,535 reachable decision-makers.

Free signup · no credit card

View the full list →

Infrastructure conglomerates based in Ireland at a glance

As of Sep 20, 2026

29.6%Verified-email coverage

180.9Average contacts per company

51-200Median size (employees)

15.2%Largest-city concentration · Dublin

Sep 20, 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 66 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 conglomerates, 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 conglomerates”. 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 conglomerates), 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 conglomerates, 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, 3,535 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 20, 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 infrastructure conglomerates, 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 conglomerates are there based in Ireland?

RevenueBase identified 66 infrastructure conglomerates 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?

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

Which city has the most infrastructure conglomerates?

Dublin leads with 10 headquartered companies, followed by Ireland (3) and Limerick (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 3,535 verified decision-maker contacts tracked across these 66 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 20, 2026.

Ready to reach these companies? Verified emails and direct dials for all 66 infrastructure conglomerates based in Ireland. Start with a free account, no credit card.

Download this list →

Related lists

Infrastructure conglomerates by geography

Browse the directory

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.