Company lists · Data refreshed September 2026

Top 25 Environmental engineering construction firms based in Ireland

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

Compiled by the RevenueBase Data Team Data refreshed Sep 16, 2026 115 companies tracked

RevenueBase identified 115 environmental engineering construction firms headquartered in Ireland as of September 2026 and tracks 5,774 professional contacts across them, including 2,635 with verified work emails. Dublin is the largest hub.

This list covers environmental engineering construction 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 16, 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 16, 2026 86% judged on-target in blind review

115Companies

5,774Contacts tracked

2,635Verified emails

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The 25 largest environmental engineering construction firms based in Ireland

Ranked by team size

Top 25 of 115 environmental engineering construction firms based in Ireland, ranked by team size, largest first. Data refreshed Sep 16, 2026. RevenueBase Smart Search rates how each company's information relates to environmental engineering construction 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	Ward And Burke	Strong evidence	Kilcolgan, IrelandHQ checked Sep 16, 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 16, 2026
2	Coffey	Strong evidence	Athenry, IrelandHQ checked Sep 16, 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 16, 2026
3	Nicholas O'dwyer LTD	Strong evidence	Dublin, IrelandHQ checked Sep 16, 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 16, 2026
4	ORS	Partial evidence	Dublin, IrelandHQ checked Sep 16, 2026	51-200	270 contacts →
	Partial 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 16, 2026
5	Elliott Group	Partial evidence	Cavan, IrelandHQ checked Sep 16, 2026	201-500	239 contacts →
	Partial evidence “Construction has always been a pivotal part of the Elliott family.” Source: RevenueBase Database · checked Sep 16, 2026
6	Roughan & O'donovan	Strong evidence	Sandyford, IrelandHQ checked Sep 16, 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 16, 2026
7	Tritech Engineering	Partial evidence	Dublin 22, IrelandHQ checked Sep 16, 2026	201-500	173 contacts →
	Partial evidence “Driving ESG Success Through Precision Engineering Investors today face increasing pressure to achieve higher building performance standards, meet strict sustainability targets…” Source: RevenueBase Database · checked Sep 16, 2026
8	MWP	Strong evidence	Blackrock, IrelandHQ checked Sep 16, 2026	51-200	160 contacts →
	Strong 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 16, 2026
9	Whitewater Group	Partial evidence	Naas, IrelandHQ checked Sep 16, 2026	201-500	131 contacts →
	Partial evidence “Whitewater Group is a multi-disciplinary engineering company with water at the heart of everything we do.” Source: RevenueBase Database · checked Sep 16, 2026
10	Fehily Timoney And Company	Strong evidence	Cork, IrelandHQ checked Sep 16, 2026	51-200	116 contacts →
	Strong 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 16, 2026
11	Shareridge	Partial evidence	Castlebar, IrelandHQ checked Sep 16, 2026	51-200	106 contacts →
	Partial evidence “Shareridge is a dynamic, modern and innovative civil engineering solutions specialist.” Source: RevenueBase Database · checked Sep 16, 2026
12	In2 Engineering	Strong evidence	Dublin, IrelandHQ checked Sep 16, 2026	51-200	100 contacts →
	Strong evidence “Engineering Firm of the Year 2025 - Engineering Excellence Awards 2025 Great Place To Work 2025-2026 accredited IN2 is a modern building services and environmental engineering…” Source: RevenueBase Database · checked Sep 16, 2026
13	Ryan Hanley, NOW Stantec	Strong evidence	Galway, IrelandHQ checked Sep 16, 2026	51-200	98 contacts →
	Strong evidence “Ryan Hanley is a leading Engineering and Environmental Consultancy.” Source: RevenueBase Database · checked Sep 16, 2026
14	Jennings O'donovan & Partners	Partial evidence	Sligo, IrelandHQ checked Sep 16, 2026	51-200	79 contacts →
	Partial 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 16, 2026
15	Sorensen Civil Engineering LTD	Strong evidence	Cork, IrelandHQ checked Sep 16, 2026	51-200	69 contacts →
	Strong evidence “Sorensen Civil Engineering Ltd is a multi-disciplined construction company that was established in 1977 and has grown to become one of Ireland's leaders in the civil and marine…” Source: RevenueBase Database · checked Sep 16, 2026
16	Tandem Project Management LTD	Strong evidence	Blackrock, IrelandHQ checked Sep 16, 2026	51-200	65 contacts →
	Strong evidence “Tandem is an engineering consultancy specialising in project management, multi-disciplined engineering design, construction management, energy & carbon reduction, EHS and talent…” Source: RevenueBase Database · checked Sep 16, 2026
17	Kilcawley Construction	Partial evidence	Sligo, IrelandHQ checked Sep 16, 2026	51-200	56 contacts →
	Partial evidence “Kilcawley Construction provide comprehensive construction services in a wide range of sectors including commercial, educational, pharmaceutical, healthcare, hospitality…” Source: RevenueBase Database · checked Sep 16, 2026
18	Varming Consulting Engineers LTD	Partial evidence	Dundrum, IrelandHQ checked Sep 16, 2026	11-50	55 contacts →
	Partial evidence “At Varming, we’re all about cutting-edge design and meticulous oversight of mechanical and electrical services, whether it’s for brand-new constructions or revitalizing existing…” Source: RevenueBase Database · checked Sep 16, 2026
19	LMH Engineering Ireland	Strong evidence	Arklow, IrelandHQ checked Sep 16, 2026	51-200	54 contacts →
	Strong evidence “Mechanical & Structural Engineering Solutions for both on-site and offsite construction.” Source: RevenueBase Database · checked Sep 16, 2026
20	Axiseng	Partial evidence	Dublin, IrelandHQ checked Sep 16, 2026	11-50	47 contacts →
	Partial evidence “Axiseng Consulting Engineers is a premier independent building services consulting engineering practice, founded in 2004 and celebrating 20 years of excellence in delivering…” Source: RevenueBase Database · checked Sep 16, 2026
21	Cleantech Civils	Indirect evidence	Co Cavan, IrelandHQ checked Sep 16, 2026	51-200	44 contacts →
	Indirect evidence “P&S Civil Works was incorporated in 1968, our trading name is Cleantech Civils.” Source: RevenueBase Database · checked Sep 16, 2026
22	Eireng Consulting Engineers LTD	Indirect evidence	Blackrock, IrelandHQ checked Sep 16, 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 16, 2026
23	Castlebrowne	Strong evidence	Dublin, IrelandHQ checked Sep 16, 2026	11-50	31 contacts →
	Strong evidence “Castlebrowne is a civil engineering and building contractor providing a full range of construction services.” Source: RevenueBase Database · checked Sep 16, 2026
24	SDS Design Engineers	Partial evidence	Castlebar, IrelandHQ checked Sep 16, 2026	11-50	31 contacts →
	Partial evidence “Established in 2003, we are an award winning design focused civil, structural, geotechnical and water engineering practice.” Source: RevenueBase Database · checked Sep 16, 2026
25	Foltech Engineering LTD	Strong evidence	Little Island, IrelandHQ checked Sep 16, 2026	51-200	31 contacts →
	Strong evidence “Foltech executes complex engineering, procurement, construction, and maintenance projects for commercial clients around the country.” Source: RevenueBase Database · checked Sep 16, 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: environmental engineering construction 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 environmental engineering construction firms.
Partial evidence: Its own public description names part of environmental engineering construction firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name environmental engineering construction 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 115 environmental engineering construction firms based in Ireland

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Environmental engineering construction firms based in Ireland at a glance

As of Sep 16, 2026

45.6%Verified-email coverage

50.2Average contacts per company

11-50Median size (employees)

12.2%Largest-city concentration · Dublin

Sep 16, 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 115 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 environmental engineering construction 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 “environmental engineering construction 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 environmental engineering construction 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 environmental engineering construction 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, 2,635 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 16, 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 environmental engineering construction 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 environmental engineering construction firms are there based in Ireland?

RevenueBase identified 115 environmental engineering construction 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?

Ward And Burke, headquartered in Kilcolgan Kilcolgan, tops this list with the largest team on record.

Which city has the most environmental engineering construction firms?

Dublin leads with 14 headquartered companies, followed by Limerick (5) and Bray (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 2,635 verified decision-maker contacts tracked across these 115 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 16, 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.