Company lists · Data verified August 2026

Top 25 Environmental consultancy firms based in Ireland

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

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 182 companies tracked

There are 182 environmental consultancy firms headquartered in Ireland (RevenueBase, August 2026). RevenueBase tracks 3,012 professional contacts across them, including 1,370 with verified work emails and 119 with mobile numbers. Dublin is the largest hub.

This list covers environmental consultancy 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.

182Companies

3,012Contacts tracked

1,370Verified emails

119Mobile numbers

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The 25 largest environmental consultancy firms based in Ireland

Ranked by team size

Top 25 of 182 environmental consultancy 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	O'connor Sutton Cronin	Cork	201-500	236	142
2	MKO	n/a	201-500	210	134
3	Dbfl Consulting Engineers LTD	n/a	51-200	181	117
4	MWP	n/a	51-200	160	73
5	Ryan Hanley, NOW Stantec	Cork	51-200	116	77
6	Fehily Timoney And Company	Cork	51-200	115	1
7	Waterman Moylan Consulting Engineers	n/a	51-200	102	55
8	Jennings O'donovan & Partners	Sligo	51-200	79	56
9	Mitchell Mcdermott	Dublin	51-200	75	60
10	Ayrton Group	Tallaght	51-200	75	38
11	AWN Consulting LTD	n/a	51-200	74	50
12	Southern Scientific Services LTD	Galway	51-200	54	19
13	Axiseng	n/a	11-50	47	31
14	NEO Environmental LTD	Naas	11-50	46	33
15	Malone O'regan Environmental	Dublin	11-50	36	35
16	Shorcontrol Safety LTD	Naas	11-50	32	25
17	Woodrow Sustainable Solutions	Ballisodare	11-50	28	20
18	Scott Cawley LTD	Blackrock	11-50	24	19
19	Enviroguide A DNV Company	n/a	11-50	23	13
20	Minerex Environmental LTD	Dublin	11-50	22	17
21	OMC	Galway	11-50	22	14
22	Brady Shipman Martin	n/a	11-50	21	13
23	KSN Horizon	Dublin	11-50	21	13
24	Antaris Consulting	n/a	11-50	20	9
25	OSL Butler Consulting Engineers	n/a	11-50	17	13

Showing 25 of 182 environmental consultancy firms based in Ireland

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Environmental consultancy firms based in Ireland at a glance

As of Aug 28, 2026

1-10Median size (employees)

DublinLargest hub · 33 HQs

119Contacts with mobile numbers

0Emails re-verified in last 30 days

Companies by employee count

1-10

113

11-50

51-200

201-500

Environmental consultancy firms by metro

Metro	Companies
Environmental consultancy firms in Dublin	33
Environmental consultancy firms in Cork	13
Environmental consultancy firms in Galway	9
Environmental consultancy firms in Naas	4
Environmental consultancy firms in Sligo	4
Environmental consultancy firms in Blackrock	3
Environmental consultancy firms in Mullingar	3

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 “environmental consultancy 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 environmental consultancy firms are there based in Ireland?

There are 182 environmental consultancy firms headquartered in Ireland as of August 2026 (RevenueBase).

What is the largest company on this list?

O'connor Sutton Cronin, headquartered in Cork, tops this list with the largest team on record.

Which city has the most environmental consultancy firms?

Dublin leads with 33 headquartered companies, followed by Cork (13) and Galway (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 1,370 verified decision-maker contacts tracked across these 182 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.