Company lists · Data refreshed October 2026

Top 25 Energy efficiency engineers based in Ireland

Name: Energy efficiency engineers based in Ireland
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Oct 12, 2026 114 companies tracked

RevenueBase identified 114 company matches for energy efficiency engineers associated with Ireland as of October 2026 and tracks 55,110 professional contacts across them, including 7,106 with verified work emails. Dublin is the largest hub.

This list covers company matches for energy efficiency engineers associated with Ireland, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed October 12, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 RevenueBase SmartSearch · Exact Recorded Oct 12, 2026 How this list was built

114Companies

55,110Contacts tracked

7,106Verified emails

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The 25 largest energy efficiency engineers based in Ireland

Ranked by team size

Top 25 of 114 company matches for energy efficiency engineers based in Ireland, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 12, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Johnson Controls	Exact match	Cork, IrelandHQ recorded Oct 12, 2026	10001+	54,046 contacts →
	Exact match “Johnson Controls is a global leader in thermal management, mission-critical building systems, energy efficiency and decarbonization.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
2	Tritech Engineering	Exact match	Dublin 22, IrelandHQ recorded Oct 12, 2026	201-500	186 contacts →
	Exact match “Driving ESG Success Through Precision Engineering Investors today face increasing pressure to achieve higher building performance standards, meet strict sustainability targets…” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
3	Em3	Exact match	Limerick, IrelandHQ recorded Oct 12, 2026	51-200	77 contacts →
	Exact match “EM3 is an industrial energy engineering and advisory partner We work with energy-intensive organisations to drive efficiencies, reduce energy costs, and deliver on decarbonisation…” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
4	SE Systems	Exact match	Cork, IrelandHQ recorded Oct 12, 2026	51-200	57 contacts →
	Exact match “SE Systems (Sustainable Energy Systems) is Ireland's leading energy solutions provider.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
5	Climeaction	Exact match	Cork, IrelandHQ recorded Oct 12, 2026	11-50	41 contacts →
	Exact match “Climeaction Cork & Boston \| B Corp Certified \| ISO 9001 & Accredited Climeaction is an industrial decarbonisation and carbon intelligence company.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
6	Ashgrove Renewables	Exact match	Cork, IrelandHQ recorded Oct 12, 2026	51-200	37 contacts →
	Exact match “We take great pride in our data-driven, scientific approach to energy solutions, spearheaded by a team known for its experience and creative design skills.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
7	KSN Energy	Exact match	Dublin, IrelandHQ recorded Oct 12, 2026	51-200	32 contacts →
	Exact match “Complex operations made simple.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
8	Verde Energy Group	Exact match	Little Island, IrelandHQ recorded Oct 12, 2026	11-50	28 contacts →
	Exact match “Verde Energy Group Delivering energy cost savings and carbon reduction solutions to Commercial & Industrial businesses since 2009.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
9	Horizon Energy Group HEG	Exact match	Cork, IrelandHQ recorded Oct 12, 2026	11-50	27 contacts →
	Exact match “Horizon Energy Group delivers technology-led solutions that reduce energy costs, cut carbon and unlock new revenue opportunities.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
10	Lawler Sustainability	Exact match	Kilkenny, IrelandHQ recorded Oct 12, 2026	11-50	25 contacts →
	Exact match “Helping Businesses Cut Energy Costs by up to 50% & Accelerate Their Journey to Net Zero!” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
11	Alternative Energy Ireland	Exact match	Dublin 12, IrelandHQ recorded Oct 12, 2026	1-10	23 contacts →
	Exact match “Renewable Energy installation company specialising in taking a broad view of a companies' energy requirements.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
12	Clean Energy Ireland	Exact match	Aherla, IrelandHQ recorded Oct 12, 2026	11-50	21 contacts →
	Exact match “We offer customers the best products, services and advice to help lower energy costs and reduce their carbon footprint.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
13	Digren Energy	Exact match	Co. Dublin, IrelandHQ recorded Oct 12, 2026	11-50	17 contacts →
	Exact match “We are an energy management consultancy.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
14	Symphony Energy	Exact match	Wicklow, IrelandHQ recorded Oct 12, 2026	11-50	17 contacts →
	Exact match “Symphony Energy is a global leader in optimising energy performance in the commercial built environment.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
15	Passive Dynamics	Exact match	Dublin, IrelandHQ recorded Oct 12, 2026	11-50	15 contacts →
	Exact match “Passive Dynamics was set up in 2020 with a vision that expert knowledge and passion can empower.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
16	ENX	Exact match	Dublin, IrelandHQ recorded Oct 12, 2026	11-50	15 contacts →
	Exact match “Mechanical, Electrical and Sustainability Consulting Engineers” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
17	Copper Coast Renewables	Exact match	Waterford, IrelandHQ recorded Oct 12, 2026	1-10	14 contacts →
	Exact match “We are your Energy Saving Net-Zero Partner At Copper Coast Renewables, we offer world class energy savings to your business through innovative green technologies such as Solar PV…” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
18	Frontline Energy	Exact match	Dublin 4, IrelandHQ recorded Oct 12, 2026	11-50	13 contacts →
	Exact match “We are energy innovators and pride ourselves in delivering an end to end range of expertise for the built environment that saves energy, carbon, time and cost.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
19	ENCON	Exact match	Waterford, IrelandHQ recorded Oct 12, 2026	11-50	13 contacts →
	Exact match “Encon is a sustainable building, retrofit, and renewables company committed to transforming how Ireland builds, renovates, and powers its spaces.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
20	Systemcore	Exact match	Dublin, IrelandHQ recorded Oct 12, 2026	11-50	13 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
21	BPC Engineers	Exact match	Dublin, IrelandHQ recorded Oct 12, 2026	11-50	12 contacts →
	Exact match “Building Performance Consulting Engineers Ltd.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
22	ICONS	Exact match	Dublin, IrelandHQ recorded Oct 12, 2026	11-50	12 contacts →
	Exact match “Our working lives are constantly being transformed by new thinking and new technology.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
23	Geaney Engineering Consultants	Exact match	Waterford, IrelandHQ recorded Oct 12, 2026	11-50	9 contacts →
	Exact match “Geaney Engineering Consultants are a building services consultancy, and energy management firm offering comprehensive engineering services, project management services, carbon…” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
24	Synergy Engineering LTD	Exact match	Dublin, IrelandHQ recorded Oct 12, 2026	11-50	8 contacts →
	Exact match “Synergy Engineering Limited (SEL) specializes in the design and development of building services, delivering innovative engineering solutions for commercial, retail, and…” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
25	Ecohouse Developments Limited	Exact match	Dublin, IrelandHQ recorded Oct 12, 2026	51-200	8 contacts →
	Exact match “We are a tight knit in‐house team of designers, architects and builders, committed to creating beautiful, energy efficient homes and buildings, working towards a passive standard.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “energy efficiency engineers”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 114 energy efficiency engineers based in Ireland

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Energy efficiency engineers based in Ireland at a glance

As of Oct 12, 2026

12.9%Verified-email coverage

483.4Average contacts per company

1-10Median size (employees)

21.9%Largest-city concentration · Dublin

Oct 12, 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 114 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies: Company records associated with Ireland whose business descriptions match “energy efficiency engineers” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 7,106 professional contacts with verified work emails across the full matched dataset. 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 October 12, 2026. Lists refresh periodically as the graph is re-checked.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Energy efficiency engineers by metro

Energy efficiency engineers in Dublin25

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “energy efficiency engineers”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many energy efficiency engineers are there based in Ireland?

RevenueBase identified 114 company matches for energy efficiency engineers associated with Ireland as of October 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Johnson Controls tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most energy efficiency engineers?

Dublin leads with 25 company records, followed by Cork (9) and Waterford (5).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 7,106 professional contacts with verified work emails tracked across these 114 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on October 12, 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 SmartSearch, 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.