Company lists · Data refreshed September 2026

Top 25 Energy engineering consulting firms based in Ireland

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

Compiled by the RevenueBase Data Team Data refreshed Sep 24, 2026 275 companies tracked

RevenueBase identified 275 energy engineering consulting firms headquartered in Ireland as of September 2026 and tracks 8,693 professional contacts across them, including 3,098 with verified work emails and 500 with mobile numbers. Dublin is the largest hub.

This list covers energy 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. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 24, 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 24, 2026 86% judged on-target in blind review

275Companies

8,693Contacts tracked

3,098Verified emails

500Mobile numbers

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The 25 largest energy engineering consulting firms based in Ireland

Ranked by team size

Top 25 of 275 energy engineering consulting firms based in Ireland, ranked by team size, largest first. Data refreshed Sep 24, 2026. RevenueBase Smart Search rates how each company's information relates to energy engineering consulting 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	Dornan	Partial evidence	Cork, IrelandHQ checked Sep 24, 2026	501-1,000	1,257 contacts →
	Partial evidence “Dornan Engineering concentrates on a market where quality is appreciated.” Source: RevenueBase Database · checked Sep 24, 2026
2	KTL	Partial evidence	Naas, IrelandHQ checked Sep 24, 2026	501-1,000	429 contacts →
	Partial 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 24, 2026
3	Shanahan Engineering	Strong evidence	Dun Laoghaire, IrelandHQ checked Sep 24, 2026	501-1,000	400 contacts →
	Strong evidence “Shanahan Engineering is a leading global energy services company.” Source: RevenueBase Database · checked Sep 24, 2026
4	Nicholas O'dwyer LTD	Strong evidence	Dublin, IrelandHQ checked Sep 24, 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 24, 2026
5	O'connor Sutton Cronin	Strong evidence	Dublin, IrelandHQ checked Sep 24, 2026	201-500	241 contacts →
	Strong evidence “OCSC is an established International Multidisciplinary Consulting Engineering & Project Management Practice.” Source: RevenueBase Database · checked Sep 24, 2026
6	Atlantic Projects Company	Partial evidence	IrelandHQ checked Sep 24, 2026	201-500	233 contacts →
	Partial 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 24, 2026
7	Roughan & O'donovan	Partial evidence	Sandyford, IrelandHQ checked Sep 24, 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 24, 2026
8	Dbfl Consulting Engineers LTD	Strong evidence	Dublin, IrelandHQ checked Sep 24, 2026	51-200	178 contacts →
	Strong 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 24, 2026
9	Fingleton White	Strong evidence	Portlaoise, IrelandHQ checked Sep 24, 2026	201-500	175 contacts →
	Strong evidence “Fingleton White is a leading provider of multidisciplinary engineering services, delivering innovative solutions to utility owners and large energy users across the Energy, Water…” Source: RevenueBase Database · checked Sep 24, 2026
10	Tritech Engineering	Partial evidence	Dublin 22, IrelandHQ checked Sep 24, 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 24, 2026
11	MWP	Strong evidence	Blackrock, IrelandHQ checked Sep 24, 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 24, 2026
12	Fehily Timoney And Company	Partial evidence	Cork, IrelandHQ checked Sep 24, 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 24, 2026
13	Punch Consulting Engineers	Strong evidence	Limerick, IrelandHQ checked Sep 24, 2026	51-200	105 contacts →
	Strong 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 24, 2026
14	Waterman Moylan Consulting Engineers	Partial evidence	Dublin, IrelandHQ checked Sep 24, 2026	51-200	99 contacts →
	Partial evidence “Waterman Moylan is a leading engineering and environmental consultancy providing specialist services to our clients in the property, infrastructure and environment markets in…” Source: RevenueBase Database · checked Sep 24, 2026
15	Jennings O'donovan & Partners	Strong evidence	Sligo, IrelandHQ checked Sep 24, 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 24, 2026
16	Interact	Partial evidence	Swords, IrelandHQ checked Sep 24, 2026	201-500	76 contacts →
	Partial evidence “Interact is a leading provider of M&E Engineering services that operates nationwide across Ireland.” Source: RevenueBase Database · checked Sep 24, 2026
17	Prochem Engineering	Partial evidence	Kilkenny, IrelandHQ checked Sep 24, 2026	51-200	75 contacts →
	Partial evidence “Prochem Engineering is one of the leading engineering consultancy firms in Ireland, having been established in 1995.” Source: RevenueBase Database · checked Sep 24, 2026
18	Tandem Project Management LTD	Strong evidence	Blackrock, IrelandHQ checked Sep 24, 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 24, 2026
19	SE Systems	Partial evidence	Cork, IrelandHQ checked Sep 24, 2026	51-200	59 contacts →
	Partial evidence “SE Systems (Sustainable Energy Systems) is Ireland's leading energy solutions provider.” Source: RevenueBase Database · checked Sep 24, 2026
20	Right Group	Partial evidence	Castleisland, IrelandHQ checked Sep 24, 2026	51-200	57 contacts →
	Partial 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 24, 2026
21	Metec Consulting Engineers	Indirect evidence	Bray, IrelandHQ checked Sep 24, 2026	51-200	56 contacts →
	Indirect evidence “Reshaping the way you think about building performance since 2007.” Source: RevenueBase Database · checked Sep 24, 2026
22	Varming Consulting Engineers LTD	Indirect evidence	Dundrum, IrelandHQ checked Sep 24, 2026	11-50	55 contacts →
	Indirect 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 24, 2026
23	Garland	Strong evidence	Rathmines, IrelandHQ checked Sep 24, 2026	51-200	50 contacts →
	Strong evidence “GARLAND is an international consulting engineering firm.” Source: RevenueBase Database · checked Sep 24, 2026
24	Enersol Engineering	Strong evidence	Drogheda, IrelandHQ checked Sep 24, 2026	51-200	49 contacts →
	Strong evidence “Enersol provides electrical power engineering services to the industrial, commercial, electrical utilities and renewable energy sectors in Ireland and the UK.” Source: RevenueBase Database · checked Sep 24, 2026
25	Brooklyn Engineering Services	Partial evidence	Dublin 18, IrelandHQ checked Sep 24, 2026	51-200	48 contacts →
	Partial evidence “Brooklyn Engineering provides electrical engineering services within the construction industry.” Source: RevenueBase Database · checked Sep 24, 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: energy engineering consulting 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 energy engineering consulting firms.
Partial evidence: Its own public description names part of energy engineering consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name energy engineering consulting 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 275 energy engineering consulting firms based in Ireland

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Energy engineering consulting firms based in Ireland at a glance

As of Sep 24, 2026

35.6%Verified-email coverage

5.8%Mobile-number coverage

31.6Average contacts per company

1-10Median size (employees)

20.4%Largest-city concentration · Dublin

Sep 24, 2026Page data refreshed

Companies by employee count

1-10

140

11-50

51-200

201-500

501-1,000

1,001-5,000

Freshness & accuracy

How recently the business emails were verified and the company information checked

Email last verified

Median 26.0d

2,3540–30

68831–60

4761–90

290–180

7180+

Company record updated

Median 79.0d

00–30

2,11431–60

3,87361–90

2,28890–180

418180+

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 energy engineering consulting 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 “energy engineering consulting 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 energy engineering consulting 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 energy engineering consulting 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, 3,098 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 24, 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 energy engineering consulting 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 energy engineering consulting firms are there based in Ireland?

RevenueBase identified 275 energy engineering consulting 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?

Dornan, headquartered in Little Island, tops this list with the largest team on record.

Which city has the most energy engineering consulting firms?

Dublin leads with 56 headquartered companies, followed by Cork (16) and Limerick (10).

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 3,098 verified decision-maker contacts tracked across these 275 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 24, 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.