Company lists · Data refreshed September 2026

Top 25 Energy services companies based in Ireland

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

Compiled by the RevenueBase Data Team Data refreshed Sep 16, 2026 103 companies tracked

RevenueBase identified 103 energy services companies headquartered in Ireland as of September 2026 and tracks 2,295 professional contacts across them, including 678 with verified work emails. Dublin is the largest hub.

This list covers energy services companies 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

103Companies

2,295Contacts tracked

678Verified emails

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The 25 largest energy services companies based in Ireland

Ranked by team size

Top 25 of 103 energy services companies 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 energy services companies: 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	SSE Airtricity	Strong evidence	IrelandHQ checked Sep 16, 2026	501-1,000	661 contacts →
	Strong evidence “SSE Airtricity has been harnessing our greatest natural resource for the past 25 years, providing cleaner, renewable energy† for homes and businesses across the country.” Source: RevenueBase Database · checked Sep 16, 2026
2	Shanahan Engineering	Strong evidence	Dun Laoghaire, IrelandHQ checked Sep 16, 2026	501-1,000	400 contacts →
	Strong evidence “Shanahan Engineering is a leading global energy services company.” Source: RevenueBase Database · checked Sep 16, 2026
3	DCC PLC	Indirect evidence	Dublin, IrelandHQ checked Sep 16, 2026	10001+	233 contacts →
	Indirect evidence “DCC is a leading international sales, marketing and support services group.” Source: RevenueBase Database · checked Sep 16, 2026
4	Pinergy	Strong evidence	Dublin, IrelandHQ checked Sep 16, 2026	51-200	100 contacts →
	Strong evidence “Pinergy is an energy transition company We’re helping our customers make data informed choices today, to take control of their energy tomorrows.” Source: RevenueBase Database · checked Sep 16, 2026
5	Electroroute	Strong evidence	Dublin, IrelandHQ checked Sep 16, 2026	51-200	98 contacts →
	Strong evidence “ElectroRoute is an international, renewables focused, energy trading and services company.” Source: RevenueBase Database · checked Sep 16, 2026
6	Em3	Strong evidence	Limerick, IrelandHQ checked Sep 16, 2026	51-200	87 contacts →
	Strong evidence “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…” Source: RevenueBase Database · checked Sep 16, 2026
7	SE Systems	Strong evidence	Cork, IrelandHQ checked Sep 16, 2026	51-200	59 contacts →
	Strong evidence “SE Systems (Sustainable Energy Systems) is Ireland's leading energy solutions provider.” Source: RevenueBase Database · checked Sep 16, 2026
8	Ashgrove Renewables	Strong evidence	Cork, IrelandHQ checked Sep 16, 2026	51-200	33 contacts →
	Strong evidence “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.” Source: RevenueBase Database · checked Sep 16, 2026
9	Verde Energy Group	Strong evidence	Little Island, IrelandHQ checked Sep 16, 2026	11-50	31 contacts →
	Strong evidence “Verde Energy Group Delivering energy cost savings and carbon reduction solutions to Commercial & Industrial businesses since 2009.” Source: RevenueBase Database · checked Sep 16, 2026
10	Alternative Energy Ireland	Strong evidence	Dublin 12, IrelandHQ checked Sep 16, 2026	1-10	27 contacts →
	Strong evidence “Renewable Energy installation company specialising in taking a broad view of a companies' energy requirements.” Source: RevenueBase Database · checked Sep 16, 2026
11	Horizon Energy Group HEG	Strong evidence	Cork, IrelandHQ checked Sep 16, 2026	11-50	26 contacts →
	Strong evidence “Horizon Energy Group delivers technology-led solutions that reduce energy costs, cut carbon and unlock new revenue opportunities.” Source: RevenueBase Database · checked Sep 16, 2026
12	Lawler Sustainability	Strong evidence	Kilkenny, IrelandHQ checked Sep 16, 2026	11-50	24 contacts →
	Strong evidence “Helping Businesses Cut Energy Costs by up to 50% & Accelerate Their Journey to Net Zero!” Source: RevenueBase Database · checked Sep 16, 2026
13	House 2 Home Retrofit LTD	Strong evidence	Dublin 12, IrelandHQ checked Sep 16, 2026	11-50	20 contacts →
	Strong evidence “House 2 Home has been Ireland's leading 'one stop shop' for energy upgrades since 2013.” Source: RevenueBase Database · checked Sep 16, 2026
14	Clean Energy Ireland	Strong evidence	Aherla, IrelandHQ checked Sep 16, 2026	11-50	18 contacts →
	Strong evidence “We offer customers the best products, services and advice to help lower energy costs and reduce their carbon footprint.” Source: RevenueBase Database · checked Sep 16, 2026
15	Mosart	Strong evidence	IrelandHQ checked Sep 16, 2026	11-50	17 contacts →
	Strong evidence “Providing expert design, energy consulting & training in high performance buildings since 1993.” Source: RevenueBase Database · checked Sep 16, 2026
16	Frontline Energy	Strong evidence	Dublin 4, IrelandHQ checked Sep 16, 2026	11-50	15 contacts →
	Strong evidence “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.” Source: RevenueBase Database · checked Sep 16, 2026
17	Digren Energy	Strong evidence	Co. Dublin, IrelandHQ checked Sep 16, 2026	11-50	14 contacts →
	Strong evidence “We are an energy management consultancy.” Source: RevenueBase Database · checked Sep 16, 2026
18	Solgrid LTD	Indirect evidence	Loughrea, IrelandHQ checked Sep 16, 2026	11-50	13 contacts →
	Indirect evidence “Solgrid is a leading Solar PV provider.” Source: RevenueBase Database · checked Sep 16, 2026
19	Copper Coast Renewables	Strong evidence	Waterford, IrelandHQ checked Sep 16, 2026	1-10	12 contacts →
	Strong evidence “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…” Source: RevenueBase Database · checked Sep 16, 2026
20	Ferm Engineering Ltd, Ireland	Strong evidence	Donegal, IrelandHQ checked Sep 16, 2026	51-200	12 contacts →
	Strong evidence “Established in 2006, Ferm Eng Limited his now positioned as a leader in Mechanical, Electrical and Renewable Energy Services in the North West of Ireland and further afield.” Source: RevenueBase Database · checked Sep 16, 2026
21	Kaizen Energy LTD	Strong evidence	IrelandHQ checked Sep 16, 2026	11-50	10 contacts →
	Strong evidence “Kaizen Energy offer full operational and management contracts for district and communal heating systems (DHS / DES).” Source: RevenueBase Database · checked Sep 16, 2026
22	Geaney Engineering Consultants	Strong evidence	Waterford, IrelandHQ checked Sep 16, 2026	11-50	9 contacts →
	Strong evidence “Geaney Engineering Consultants are a building services consultancy, and energy management firm offering comprehensive engineering services, project management services, carbon…” Source: RevenueBase Database · checked Sep 16, 2026
23	Lennon Solar	Strong evidence	IrelandHQ checked Sep 16, 2026	11-50	9 contacts →
	Strong evidence “At lennon solar, we are passionate about providing sustainable and affordable energy solutions to our clients.” Source: RevenueBase Database · checked Sep 16, 2026
24	ENSEN	Strong evidence	Riverstown Po, IrelandHQ checked Sep 16, 2026	11-50	7 contacts →
	Strong evidence “Energy Sustainability Environment ENSEN is a concept – implementation of sustainable principals through the delivery of Energy and Environmental products and services in a…” Source: RevenueBase Database · checked Sep 16, 2026
25	Vivid Edge	Indirect evidence	Ucd Belfield Dublin 4, IrelandHQ checked Sep 16, 2026	1-10	6 contacts →
	Indirect evidence “At Vivid Edge, we're passionate about helping our customers save precious time and funds while cutting carbon.” 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: energy services companies. 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 services companies.
Partial evidence: Its own public description names part of energy services companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name energy services companies. 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 103 energy services companies based in Ireland

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Energy services companies based in Ireland at a glance

As of Sep 16, 2026

29.5%Verified-email coverage

22.3Average contacts per company

1-10Median size (employees)

16.5%Largest-city concentration · Dublin

Sep 16, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

501-1,000

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 103 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 energy services companies, 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 services companies”. 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 services companies), 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 services companies, 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, 678 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 energy services companies, 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 services companies are there based in Ireland?

RevenueBase identified 103 energy services companies 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?

SSE Airtricity, headquartered in Ireland, tops this list with the largest team on record.

Which city has the most energy services companies?

Dublin leads with 17 headquartered companies, 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 the top results, verified emails and direct dials included. Upgrading unlocks all 678 verified decision-maker contacts tracked across these 103 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.