Company lists · Data refreshed September 2026

Top 25 Water resources engineering firms based in Ireland

Name: Water resources engineering firms based in Ireland
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 65 companies tracked

RevenueBase identified 65 water resources engineering firms headquartered in Ireland as of September 2026 and tracks 2,645 professional contacts across them, including 1,259 with verified work emails. Dublin is the largest hub.

This list covers water resources engineering firms 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 19, 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 19, 2026 86% judged on-target in blind review

65Companies

2,645Contacts tracked

1,259Verified emails

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The 25 largest water resources engineering firms based in Ireland

Ranked by team size

Top 25 of 65 water resources engineering firms based in Ireland, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to water resources engineering firms: 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	Nicholas O'dwyer LTD	Strong evidence	Dublin, IrelandHQ checked Sep 19, 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 19, 2026
2	O'connor Sutton Cronin	Partial evidence	Dublin, IrelandHQ checked Sep 19, 2026	201-500	241 contacts →
	Partial evidence “OCSC is an established International Multidisciplinary Consulting Engineering & Project Management Practice.” Source: RevenueBase Database · checked Sep 19, 2026
3	Roughan & O'donovan	Partial evidence	Sandyford, IrelandHQ checked Sep 19, 2026	201-500	227 contacts →
	Partial evidence “Roughan and O’Donovan (ROD) is a leading civil, environmental and structural engineering consultancy.” Source: RevenueBase Database · checked Sep 19, 2026
4	Dbfl Consulting Engineers LTD	Partial evidence	Dublin, IrelandHQ checked Sep 19, 2026	51-200	178 contacts →
	Partial evidence “DBFL is a fully Irish-owned firm specializing in the planning, engineering design and delivery within the property, infrastructure, environmental & energy sectors.” Source: RevenueBase Database · checked Sep 19, 2026
5	MWP	Partial evidence	Blackrock, IrelandHQ checked Sep 19, 2026	51-200	160 contacts →
	Partial evidence “MWP is a multi-disciplinary Engineering and Environmental Consulting Practice providing a first class service to its clients since it was founded in 1967.” Source: RevenueBase Database · checked Sep 19, 2026
6	Whitewater Group	Strong evidence	Naas, IrelandHQ checked Sep 19, 2026	201-500	131 contacts →
	Strong evidence “Whitewater Group is a multi-disciplinary engineering company with water at the heart of everything we do.” Source: RevenueBase Database · checked Sep 19, 2026
7	Fehily Timoney And Company	Partial evidence	Cork, IrelandHQ checked Sep 19, 2026	51-200	116 contacts →
	Partial evidence “Fehily Timoney and Company is a Irish civil and environmental, engineering, scientific and planning consultancy specialising in the areas of Sustainable Infrastructure, Planning…” Source: RevenueBase Database · checked Sep 19, 2026
8	Shareridge	Partial evidence	Castlebar, IrelandHQ checked Sep 19, 2026	51-200	106 contacts →
	Partial evidence “Shareridge is a dynamic, modern and innovative civil engineering solutions specialist.” Source: RevenueBase Database · checked Sep 19, 2026
9	Punch Consulting Engineers	Partial evidence	Limerick, IrelandHQ checked Sep 19, 2026	51-200	105 contacts →
	Partial 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 19, 2026
10	Ryan Hanley, NOW Stantec	Partial evidence	Galway, IrelandHQ checked Sep 19, 2026	51-200	98 contacts →
	Partial evidence “Ryan Hanley is a leading Engineering and Environmental Consultancy.” Source: RevenueBase Database · checked Sep 19, 2026
11	Jennings O'donovan & Partners	Strong evidence	Sligo, IrelandHQ checked Sep 19, 2026	51-200	79 contacts →
	Strong evidence “Jennings O’Donovan is a multidisciplinary consulting engineering firm specialising in renewable energy, water supply, wastewater treatment and in the provision of planning and…” Source: RevenueBase Database · checked Sep 19, 2026
12	AWN Consulting LTD	Partial evidence	Dublin, IrelandHQ checked Sep 19, 2026	51-200	74 contacts →
	Partial evidence “AWN Consulting is a multidisciplinary consultancy offering specialist design advice in respect of a wide range of engineering and environmental disciplines.” Source: RevenueBase Database · checked Sep 19, 2026
13	Right Group	Strong evidence	Castleisland, IrelandHQ checked Sep 19, 2026	51-200	57 contacts →
	Strong evidence “At Right Group, our experienced team has collectively propelled us to the forefront as the leading provider of Electrical and Mechanical Engineering solutions in the water and…” Source: RevenueBase Database · checked Sep 19, 2026
14	Eireng Consulting Engineers LTD	Indirect evidence	Blackrock, IrelandHQ checked Sep 19, 2026	11-50	38 contacts →
	Indirect evidence “EirEng Consulting Engineers is a firm of highly experienced and motivated Civil and Structural Design Engineers with offices in Ireland and the UK, dedicated to providing cutting…” Source: RevenueBase Database · checked Sep 19, 2026
15	SDS Design Engineers	Strong evidence	Castlebar, IrelandHQ checked Sep 19, 2026	11-50	31 contacts →
	Strong evidence “Established in 2003, we are an award winning design focused civil, structural, geotechnical and water engineering practice.” Source: RevenueBase Database · checked Sep 19, 2026
16	Capcon	Partial evidence	Maynooth, IrelandHQ checked Sep 19, 2026	51-200	26 contacts →
	Partial evidence “Capcon Engineering are rainwater drainage and harvesting specialists providing design consultation and sub-contracting services on large-scale construction projects.” Source: RevenueBase Database · checked Sep 19, 2026
17	Minerex Environmental LTD	Indirect evidence	Dublin 14, IrelandHQ checked Sep 19, 2026	11-50	22 contacts →
	Indirect evidence “Minerex Environmental Ltd.(MEL) was established in 1994 as an independent Irish consultancy providing environmental services in the hydrogeological and environmental disciplines…” Source: RevenueBase Database · checked Sep 19, 2026
18	Cdga Consultants	Indirect evidence	Cork, IrelandHQ checked Sep 19, 2026	11-50	16 contacts →
	Indirect evidence “CDGA was founded in 1997.” Source: RevenueBase Database · checked Sep 19, 2026
19	Mcardle Doyle	Partial evidence	Dundalk, IrelandHQ checked Sep 19, 2026	11-50	15 contacts →
	Partial evidence “Civil & Structural Engineering Consultancy” Source: RevenueBase Database · checked Sep 19, 2026
20	Conway Engineering	Partial evidence	Limerick, IrelandHQ checked Sep 19, 2026	11-50	14 contacts →
	Partial evidence “Conway Engineering have been in operation for over 40 years specialising in the design, manufacture and installation of mechanical and electrical engineering solutions to meet…” Source: RevenueBase Database · checked Sep 19, 2026
21	Doherty Finegan Kelly LTD	Partial evidence	Dublin, IrelandHQ checked Sep 19, 2026	11-50	11 contacts →
	Partial evidence “Doherty Finegan Kelly (DFK) Consulting Engineers are established Engineering Consultants and provide a comprehensive range of consultancy services specialising in all aspects of…” Source: RevenueBase Database · checked Sep 19, 2026
22	Mccarthy Browne	Indirect evidence	Naas, IrelandHQ checked Sep 19, 2026	1-10	11 contacts →
	Indirect evidence “A Consultancy of Chartered Engineers coupling Civil and Marine construction experience with innovative design excellence.” Source: RevenueBase Database · checked Sep 19, 2026
23	Crocon Engineers LTD	Indirect evidence	Bantry, IrelandHQ checked Sep 19, 2026	1-10	11 contacts →
	Indirect evidence “Crocon Engineers Ltd, can provide advice, across a wide-ranging spectrum of projects in which your business may be involved, now or in the future.” Source: RevenueBase Database · checked Sep 19, 2026
24	Liffey Developments	Partial evidence	Dublin, IrelandHQ checked Sep 19, 2026	11-50	10 contacts →
	Partial evidence “Since 1983, Liffey Developments has been providing a full range of civil engineering and project management services.” Source: RevenueBase Database · checked Sep 19, 2026
25	CST Group Consulting Engineers	Partial evidence	Sligo, IrelandHQ checked Sep 19, 2026	1-10	9 contacts →
	Partial evidence “Consulting Civil, Structural & Traffic Engineers with expert knowledge in the fields of - Economic, sustainable development - Traffic Engineering - Road Safety Auditing (RSA)- RTA…” Source: RevenueBase Database · checked Sep 19, 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: water resources engineering firms. 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 water resources engineering firms.
Partial evidence: Its own public description names part of water resources engineering firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name water resources engineering firms. 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 65 water resources engineering firms based in Ireland

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Water resources engineering firms based in Ireland at a glance

As of Sep 19, 2026

47.6%Verified-email coverage

40.7Average contacts per company

11-50Median size (employees)

13.8%Largest-city concentration · Dublin

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

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 65 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 water resources engineering firms, 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 “water resources engineering firms”. 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 water resources engineering firms), 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 water resources engineering firms, 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, 1,259 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 19, 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 water resources engineering firms, 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 water resources engineering firms are there based in Ireland?

RevenueBase identified 65 water resources engineering firms 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?

Nicholas O'dwyer LTD, headquartered in Ireland, tops this list with the largest team on record.

Which city has the most water resources engineering firms?

Dublin leads with 9 headquartered companies, followed by Cork (4) and Limerick (3).

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 1,259 verified decision-maker contacts tracked across these 65 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 19, 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.