Company lists · Data refreshed September 2026

Top 25 Building systems engineering firms based in Ireland

Name: Building systems engineering 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 69 companies tracked

RevenueBase identified 69 building systems engineering firms headquartered in Ireland as of September 2026 and tracks 1,354 professional contacts across them, including 617 with verified work emails. Dublin is the largest hub.

This list covers building systems 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 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

69Companies

1,354Contacts tracked

617Verified emails

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The 25 largest building systems engineering firms based in Ireland

Ranked by team size

Top 25 of 69 building systems engineering 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 building systems 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	Tritech Engineering	Strong evidence	Dublin 22, IrelandHQ checked Sep 16, 2026	201-500	173 contacts →
	Strong 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
2	Gdcl Consulting Engineers	Partial evidence	Dublin 12, IrelandHQ checked Sep 16, 2026	11-50	116 contacts →
	Partial evidence “From original inception in 1991, GDCL Consulting Engineers have evolved as a provider of civil and structural engineering services with a proven track record of successful…” Source: RevenueBase Database · checked Sep 16, 2026
3	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
4	Gaffney Mechanical	Partial evidence	Dublin, IrelandHQ checked Sep 16, 2026	51-200	93 contacts →
	Partial evidence “ENGINEERING EXPERTISE THAT DELIVERS INTELLIGENCE, EXCELLENCE & INNOVATION TO EVERY PROJECT.” Source: RevenueBase Database · checked Sep 16, 2026
5	Burlington Engineering	Strong evidence	Dublin, IrelandHQ checked Sep 16, 2026	51-200	64 contacts →
	Strong evidence “Burlington Engineering Limited is a building services engineering provider with a long established reputation as one of the leading companies operating in its field.” Source: RevenueBase Database · checked Sep 16, 2026
6	Metec Consulting Engineers	Partial evidence	Bray, IrelandHQ checked Sep 16, 2026	51-200	56 contacts →
	Partial evidence “Reshaping the way you think about building performance since 2007.” Source: RevenueBase Database · checked Sep 16, 2026
7	Varming Consulting Engineers LTD	Indirect evidence	Dundrum, IrelandHQ checked Sep 16, 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 16, 2026
8	Axiseng	Strong evidence	Dublin, IrelandHQ checked Sep 16, 2026	11-50	47 contacts →
	Strong 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
9	Lynskey Engineering LTD	Strong evidence	Dublin 10, IrelandHQ checked Sep 16, 2026	51-200	47 contacts →
	Strong evidence “Lynskey Engineering Limited provide a wide scope of Mechanical Building Services covering commercial, industrial, process and mixed use developments.” Source: RevenueBase Database · checked Sep 16, 2026
10	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
11	MMA Consulting Engineers	Partial evidence	Balbriggan, IrelandHQ checked Sep 16, 2026	11-50	35 contacts →
	Partial evidence “MMA Consulting Engineers is committed to providing integrated engineering solutions and has grown to become one of the most recognized and sought-after mechanical and electrical…” Source: RevenueBase Database · checked Sep 16, 2026
12	Downes Associates	Partial evidence	Dublin 12, IrelandHQ checked Sep 16, 2026	11-50	20 contacts →
	Partial evidence “Downes Associates is a Structural and Civil Engineering Consultancy specialising in the delivery of quality civil and structural design solutions.” Source: RevenueBase Database · checked Sep 16, 2026
13	William Farrell Limited	Indirect evidence	Dublin 18, IrelandHQ checked Sep 16, 2026	11-50	18 contacts →
	Indirect evidence “Welcome to William Farrell Ltd.” Source: RevenueBase Database · checked Sep 16, 2026
14	Walsh Group	Strong evidence	Ballinrobe, IrelandHQ checked Sep 16, 2026	51-200	17 contacts →
	Strong evidence “Walsh Group is a Building Services Engineering Contractor offering a comprehensive range of installation services.” Source: RevenueBase Database · checked Sep 16, 2026
15	Joda Engineering Consultants	Partial evidence	Cork, IrelandHQ checked Sep 16, 2026	11-50	17 contacts →
	Partial evidence “JODA Engineering Consultants was established in 1961 and is considered one of Ireland's most prestigious engineering firms in the country.” Source: RevenueBase Database · checked Sep 16, 2026
16	Laminar Engineering	Partial evidence	Dublin 12, IrelandHQ checked Sep 16, 2026	11-50	16 contacts →
	Partial evidence “Mechanical Engineering Contractors” Source: RevenueBase Database · checked Sep 16, 2026
17	Systemcore	Partial evidence	Dublin, IrelandHQ checked Sep 16, 2026	11-50	15 contacts →
	Partial evidence “We are the next generation of M&E consulting engineers, dedicated to designing systems for low-carbon, intelligent, self-optimising spaces that enhance occupant well-being, and…” Source: RevenueBase Database · checked Sep 16, 2026
18	Wilson Architecture Ommw	Indirect evidence	Cork, IrelandHQ checked Sep 16, 2026	11-50	13 contacts →
	Indirect evidence “With over 35 years of experience, Wilson Architecture is one of Ireland’s leading award winning Architectural firms.” Source: RevenueBase Database · checked Sep 16, 2026
19	ENX	Indirect evidence	Dublin, IrelandHQ checked Sep 16, 2026	11-50	13 contacts →
	Indirect evidence “Mechanical, Electrical and Sustainability Consulting Engineers” Source: RevenueBase Database · checked Sep 16, 2026
20	JAK Consulting Engineers	Indirect evidence	Dublin, IrelandHQ checked Sep 16, 2026	11-50	12 contacts →
	Indirect evidence “JAK Consulting Engineers is a leading multi-award winning MEP design and sustainable energy consultancy firm in Ireland, UK, Middle East and Asia.” Source: RevenueBase Database · checked Sep 16, 2026
21	Pmep Consulting LTD	Partial evidence	Citywest Shopping Centre, IrelandHQ checked Sep 16, 2026	11-50	12 contacts →
	Partial evidence “Penston MEP Consulting Limited is a Mechanical and Electrical Engineering Consultancy Practice.” Source: RevenueBase Database · checked Sep 16, 2026
22	Doherty Finegan Kelly LTD	Partial evidence	Dublin, IrelandHQ checked Sep 16, 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 16, 2026
23	DON O' Malley & Partners Consulting Engineers. Est. 1967	Strong evidence	Limerick, IrelandHQ checked Sep 16, 2026	11-50	11 contacts →
	Strong evidence “Don O'Malley & Partners was established in 1967 and is one of Ireland’s leading Consulting Engineering Practices in Building Services Engineering.” Source: RevenueBase Database · checked Sep 16, 2026
24	Matt O'mahony & Associates	Strong evidence	Cork, IrelandHQ checked Sep 16, 2026	11-50	11 contacts →
	Strong evidence “At Matt O’Mahony & Associates, we have an extensive and diverse portfolio of projects illustrating our experience in the provision of full Building Services and Engineering Design…” Source: RevenueBase Database · checked Sep 16, 2026
25	Paragon GRP Limited	Strong evidence	Dublin, IrelandHQ checked Sep 16, 2026	51-200	10 contacts →
	Strong evidence “An Engineering Group, specialising in Mechanical, Air Conditioning and Building Facilities contracts.” 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: building systems 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 building systems engineering firms.
Partial evidence: Its own public description names part of building systems engineering firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name building systems 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 69 building systems engineering firms based in Ireland

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Building systems engineering firms based in Ireland at a glance

As of Sep 16, 2026

45.6%Verified-email coverage

19.6Average contacts per company

11-50Median size (employees)

30.4%Largest-city concentration · Dublin

Sep 16, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

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 69 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 building systems 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 “building systems 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 building systems 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 building systems 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, 617 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 building systems 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 building systems engineering firms are there based in Ireland?

RevenueBase identified 69 building systems 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?

Tritech Engineering, headquartered in Dublin, tops this list with the largest team on record.

Which city has the most building systems engineering firms?

Dublin leads with 21 headquartered companies, followed by Limerick (3) and Carlow (2).

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 617 verified decision-maker contacts tracked across these 69 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.