Company lists · Data refreshed September 2026

Top 23 Engineering companies based in Ireland

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

Compiled by the RevenueBase Data Team Data refreshed Sep 6, 2026 781 companies tracked

This directory lists 781 engineering companies based in Ireland, with 36,296 contacts and 13,326 email addresses. The list includes companies across engineering disciplines, and Dublin is the single most-represented city among the companies on the list. Use it to identify potential suppliers, partners, and sales prospects as of September 2026.

Engineering companies apply scientific, mathematical, and technical principles to design, develop, test, and manage products, systems, structures, or industrial processes. This list covers companies that provide engineering design, consulting, testing, project management, or related technical services. Ranked by team size, largest first. Data current as of September 6, 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 6, 2026 86% judged on-target in blind review

781Companies

36,296Contacts tracked

13,326Verified emails

1,460Mobile numbers

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The 23 largest engineering companies based in Ireland

Ranked by team size

Top 23 of 781 engineering companies based in Ireland, ranked by team size, largest first. Data refreshed Sep 6, 2026. RevenueBase Smart Search rates how each company's information relates to engineering 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	PM Group	Indirect evidence	Dublin, IrelandHQ checked Sep 6, 2026	1,001-5,000	3,672 contacts →
	Indirect evidence “At PM Group, our vision is to enable a world where science and technology transform lives.” Source: RevenueBase Database · checked Sep 6, 2026
2	Mercury	Indirect evidence	Dublin, IrelandHQ checked Sep 6, 2026	1,001-5,000	2,418 contacts →
	Indirect evidence “Mercury is the European leader in construction solutions.” Source: RevenueBase Database · checked Sep 6, 2026
3	Jones Engineering	Strong evidence	Dublin 4, IrelandHQ checked Sep 6, 2026	1,001-5,000	2,415 contacts →
	Strong evidence “Jones Engineering is a multi-disciplined engineering contracting company, offering the complete range of engineering and building services installations.” Source: RevenueBase Database · checked Sep 6, 2026
4	Kirby Group Engineering	Strong evidence	Limerick, IrelandHQ checked Sep 6, 2026	1,001-5,000	1,486 contacts →
	Strong evidence “Founded in 1964, Kirby is a leading Mechanical and Electrical engineering contractor with operations in Ireland, the UK, mainland Europe and South Africa.” Source: RevenueBase Database · checked Sep 6, 2026
5	Dornan	Strong evidence	Cork, IrelandHQ checked Sep 6, 2026	501-1,000	1,257 contacts →
	Strong evidence “Dornan Engineering concentrates on a market where quality is appreciated.” Source: RevenueBase Database · checked Sep 6, 2026
6	Designer Group	Strong evidence	Dublin, IrelandHQ checked Sep 6, 2026	1,001-5,000	911 contacts →
	Strong 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 6, 2026
7	Ward And Burke	Strong evidence	Kilcolgan, IrelandHQ checked Sep 6, 2026	1,001-5,000	632 contacts →
	Strong 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 6, 2026
8	SEPAM	Strong evidence	Clonmel, IrelandHQ checked Sep 6, 2026	1,001-5,000	556 contacts →
	Strong evidence “SEPAM is a family owned Global Engineering & Project Management Company founded in 1976 with a broad range of experience working on Major Capital Projects across the world.” Source: RevenueBase Database · checked Sep 6, 2026
9	Specialist Technical Services STS Group	Strong evidence	Old Kilmeaden Road, IrelandHQ checked Sep 6, 2026	1,001-5,000	482 contacts →
	Strong evidence “STS Group, is dedicated to being the leading and most cost-efficient provider of electrical engineering, instrumentation, design and commissioning services across Ireland, UK…” Source: RevenueBase Database · checked Sep 6, 2026
10	Wills Bros Group	Strong evidence	Foxford, IrelandHQ checked Sep 6, 2026	201-500	438 contacts →
	Strong evidence “Over the past 50+ years Wills Bros has steadily and sustainably grown as a leading UK & Ireland Civil Engineering Contractor with over 450 employees and growing.” Source: RevenueBase Database · checked Sep 6, 2026
11	KTL	Strong evidence	Naas, IrelandHQ checked Sep 6, 2026	501-1,000	429 contacts →
	Strong evidence “For over 27 years, KTL has been a leading provider of fast, effective, and reliable engineering services across the professional services, telecommunications, and power sectors.” Source: RevenueBase Database · checked Sep 6, 2026
12	Shanahan Engineering	Strong evidence	Dun Laoghaire, IrelandHQ checked Sep 6, 2026	501-1,000	400 contacts →
	Strong evidence “Shanahan Engineering is a leading global energy services company.” Source: RevenueBase Database · checked Sep 6, 2026
13	King & Moffatt Building Services	Indirect evidence	Carrick On Shannon, IrelandHQ checked Sep 6, 2026	501-1,000	339 contacts →
	Indirect evidence “King & Moffatt Building Services are award-winning international Mechanical & Electrical Contractors with over 45 years experience, operating throughout Ireland, the United…” Source: RevenueBase Database · checked Sep 6, 2026
14	Coffey	Strong evidence	Athenry, IrelandHQ checked Sep 6, 2026	201-500	324 contacts →
	Strong 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 6, 2026
15	GMC Utilities Group	Strong evidence	Ballycoolin, IrelandHQ checked Sep 6, 2026	501-1,000	291 contacts →
	Strong 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 6, 2026
16	Nicholas O'dwyer LTD	Strong evidence	Dublin, IrelandHQ checked Sep 6, 2026	201-500	284 contacts →
	Strong 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 6, 2026
17	ORS	Indirect evidence	Dublin, IrelandHQ checked Sep 6, 2026	51-200	270 contacts →
	Indirect evidence “Since 1991, ORS has led the way in anticipating and responding to diverse client requirements in the construction industry.” Source: RevenueBase Database · checked Sep 6, 2026
18	Pmce Consultants	Strong evidence	Dublin 6w, IrelandHQ checked Sep 6, 2026	n/a	261 contacts →
	Strong evidence “PMCE is a Consulting Engineering practice offering services to private and public clients in the areas of Road Safety Engineering (inclduding Road Safety Audits and Road Safety…” Source: RevenueBase Database · checked Sep 6, 2026
19	O'connor Sutton Cronin	Strong evidence	Dublin, IrelandHQ checked Sep 6, 2026	201-500	241 contacts →
	Strong evidence “OCSC is an established International Multidisciplinary Consulting Engineering & Project Management Practice.” Source: RevenueBase Database · checked Sep 6, 2026
20	MSL Engineering LTD	Strong evidence	Cork, IrelandHQ checked Sep 6, 2026	51-200	234 contacts →
	Strong evidence “Celebrating 40 years in business in 2019, MSL Engineering Ltd.” Source: RevenueBase Database · checked Sep 6, 2026
21	Atlantic Projects Company	Strong evidence	IrelandHQ checked Sep 6, 2026	201-500	233 contacts →
	Strong evidence “Atlantic Projects Company (APC) provide bespoke engineering construction & maintenance services for the generation of electricity through renewable & thermal technologies.” Source: RevenueBase Database · checked Sep 6, 2026
22	Roughan & O'donovan	Strong evidence	Sandyford, IrelandHQ checked Sep 6, 2026	201-500	227 contacts →
	Strong evidence “Roughan and O’Donovan (ROD) is a leading civil, environmental and structural engineering consultancy.” Source: RevenueBase Database · checked Sep 6, 2026
23	Neodyne	Strong evidence	Little Island, IrelandHQ checked Sep 6, 2026	201-500	200 contacts →
	Strong evidence “NeoDyne is a leading engineering company specialising in industrial automation, digital manufacturing, and electrical engineering solutions.” Source: RevenueBase Database · checked Sep 6, 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: engineering 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 engineering companies.
Partial evidence: Its own public description names part of engineering companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name engineering 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 23 of 781 engineering companies based in Ireland

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Engineering companies based in Ireland at a glance

As of Sep 6, 2026

36.7%Verified-email coverage

4.0%Mobile-number coverage

46.5Average contacts per company

11-50Median size (employees)

13.6%Largest-city concentration · Dublin

Sep 6, 2026Page data refreshed

Companies by employee count

1-10

312

11-50

262

51-200

141

201-500

501-1,000

1,001-5,000

10001+

Freshness & accuracy

How recently the business emails on this list were verified

Email last verified

12,3980–30

85631–60

661–90

490–180

62180+

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 engineering 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 “engineering 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 engineering 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 engineering 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, 13,326 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 6, 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.

Engineering companies by metro

Frequently asked

How many engineering companies are based in Ireland?

The directory lists 781 engineering companies based in Ireland as of September 2026.

What services do engineering companies provide?

Engineering companies provide services such as design, consulting, testing, project management, and technical support across disciplines and industries.

How can I find contacts at engineering companies?

This directory includes 36,296 contacts and 13,326 email addresses associated with engineering companies.

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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.