Company lists · Data verified August 2026

Top 25 Engineering consulting firms based in Ireland

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

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 411 companies tracked

There are 411 engineering consulting firms headquartered in Ireland (RevenueBase, August 2026). RevenueBase tracks 13,804 professional contacts across them, including 4,807 with verified work emails and 486 with mobile numbers. Dublin is the largest hub.

This list covers engineering consulting firms headquartered in Ireland, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Data current as of August 28, 2026.

411Companies

13,804Contacts tracked

4,807Verified emails

486Mobile numbers

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The 25 largest engineering consulting firms based in Ireland

Ranked by team size

Top 25 of 411 engineering consulting firms based in Ireland, ranked by team size, largest first. Data verified Aug 28, 2026. Click a count to unlock that company's people.
#	Company	HQ	Employees	Contacts	Verified emails
1	Jones Engineering	n/a	1,001-5,000	2,403	1,096
2	Dornan	Little Island	501-1,000	1,239	119
3	Coffey	Enfield	201-500	323	186
4	ORS	n/a	51-200	267	136
5	O'connor Sutton Cronin	Cork	201-500	236	142
6	MKO	n/a	201-500	210	134
7	Dbfl Consulting Engineers LTD	n/a	51-200	181	117
8	Fingleton White	Dublin	201-500	175	120
9	Tritech Engineering	Dublin	201-500	172	82
10	KSN	Dublin	51-200	165	59
11	Egis In Ireland	n/a	501-1,000	144	52
12	Secto Services Limited	n/a	201-500	134	88
13	Gavin & Doherty Geosolutions GDG	Cork	51-200	122	80
14	Ryan Hanley, NOW Stantec	Cork	51-200	116	77
15	Punch Consulting Engineers	Dun Laoghaire	51-200	109	78
16	Shareridge	Castlebar	51-200	105	75
17	Waterman Moylan Consulting Engineers	n/a	51-200	102	55
18	Clifton Scannell Emerson Associates	n/a	51-200	92	67
19	Igsl Limited	Naas	51-200	91	13
20	ROSS	Athlone	51-200	82	24
21	Jennings O'donovan & Partners	Sligo	51-200	79	56
22	Barrett Mahony Consulting Engineers	n/a	51-200	79	41
23	Mitchell Mcdermott	Dublin	51-200	75	60
24	Prochem Engineering	n/a	51-200	75	48
25	Ayrton Group	Tallaght	51-200	75	38

Showing 25 of 411 engineering consulting firms based in Ireland

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Engineering consulting firms based in Ireland at a glance

As of Aug 28, 2026

11-50Median size (employees)

DublinLargest hub · 73 HQs

486Contacts with mobile numbers

0Emails re-verified in last 30 days

Companies by employee count

1-10

194

11-50

134

51-200

201-500

501-1,000

1,001-5,000

10001+

Engineering consulting firms by metro

Metro	Companies
Engineering consulting firms in Dublin	73
Engineering consulting firms in Cork	23
Engineering consulting firms in Limerick	13
Engineering consulting firms in Naas	8
Engineering consulting firms in Kilkenny	5
Engineering consulting firms in Athlone	5
Engineering consulting firms in Ballincollig	4

How this list was built

Source: The RevenueBase company graph: 21.3 million companies and 398.9 million professional contacts resolved from primary sources.
Inclusion: Companies whose own business descriptions match “engineering consulting firms”, with match quality audited by blind human judging, and headquartered in Ireland.
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: Contact records re-verify on a rolling cadence; 0 contacts on this list were re-verified in the last 30 days.
Refresh: Lists are refreshed periodically as the underlying company graph is re-verified. Last verified Aug 28, 2026.

Frequently asked

How many engineering consulting firms are there based in Ireland?

There are 411 engineering consulting firms headquartered in Ireland as of August 2026 (RevenueBase).

What is the largest company on this list?

Jones Engineering, headquartered in Ireland, tops this list with the largest team on record.

Which city has the most engineering consulting firms?

Dublin leads with 73 headquartered companies, followed by Cork (23) and Limerick (13).

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 4,807 verified decision-maker contacts tracked across these 411 companies.

How current is this list?

The list is refreshed periodically as the underlying company graph is re-verified. It was last verified on August 28, 2026.

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About this data

RevenueBase is a B2B contact data platform. Its company graph covers 21.3 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, the same data that powers RevenueBase's B2B data products and the free research portal.