Company lists · Data refreshed September 2026

Top 25 Telecommunication engineering firms based in Ireland

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

Compiled by the RevenueBase Data Team Data refreshed Sep 30, 2026 45 companies tracked

RevenueBase identified 45 telecommunication engineering firms headquartered in Ireland as of September 2026 and tracks 1,200 professional contacts across them, including 448 with verified work emails. Dublin is the largest hub.

This list covers telecommunication 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 30, 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 30, 2026 86% judged on-target in blind review

45Companies

1,200Contacts tracked

448Verified emails

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The 25 largest telecommunication engineering firms based in Ireland

Ranked by team size

Top 25 of 45 telecommunication engineering firms based in Ireland, ranked by team size, largest first. Data refreshed Sep 30, 2026. RevenueBase Smart Search rates how each company's information relates to telecommunication 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	KTL	Strong evidence	Naas, IrelandHQ checked Sep 30, 2026	501-1,000	429 contacts →
	Strong 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 30, 2026
2	Secto Services Limited	Partial evidence	Maynooth, IrelandHQ checked Sep 30, 2026	201-500	136 contacts →
	Partial evidence “Delivering Successful Engineering and Technical Services Secto Services is a fast growing Infrastructure build and engineering solutions company where customer service and the…” Source: RevenueBase Database · checked Sep 30, 2026
3	Dexgreen LTD	Partial evidence	Cork, IrelandHQ checked Sep 30, 2026	11-50	83 contacts →
	Partial evidence “DexGreen Ltd has operated for over 27 years, engineering novel solutions by collaborating directly with our clients.” Source: RevenueBase Database · checked Sep 30, 2026
4	CET Connect	Indirect evidence	Clonmel, IrelandHQ checked Sep 30, 2026	51-200	80 contacts →
	Indirect evidence “CET Connect is a leading installer of IT Network Infrastructure & Structured Cabling Installations.” Source: RevenueBase Database · checked Sep 30, 2026
5	Brooklyn Engineering Services	Partial evidence	Dublin 18, IrelandHQ checked Sep 30, 2026	51-200	48 contacts →
	Partial evidence “Brooklyn Engineering provides electrical engineering services within the construction industry.” Source: RevenueBase Database · checked Sep 30, 2026
6	Surecom Network Solutions LTD	Partial evidence	Cahir, IrelandHQ checked Sep 30, 2026	51-200	39 contacts →
	Partial evidence “Surecom Network Solutions is a multi-award-winning engineering firm based in Ireland and the UK.” Source: RevenueBase Database · checked Sep 30, 2026
7	Spectrum Telecom Installations LTD	Partial evidence	Clane, IrelandHQ checked Sep 30, 2026	51-200	33 contacts →
	Partial evidence “Spectrum is a leading supplier of network deployment and build solutions together with the provision of high quality maintenance services for the telecommunications industry in…” Source: RevenueBase Database · checked Sep 30, 2026
8	Circet Data Centre Services	Indirect evidence	Dublin 15, IrelandHQ checked Sep 30, 2026	11-50	26 contacts →
	Indirect evidence “Supply and install of Fibre and Copper cable systems for both the Telecom and Data Industry, Data centre Specialists.” Source: RevenueBase Database · checked Sep 30, 2026
9	Network 2000	Partial evidence	County Dublin, IrelandHQ checked Sep 30, 2026	11-50	21 contacts →
	Partial evidence “Established in 2002, Network has been providing dedicated and specialised telecommunications infrastructure services to the commercial, industrial & public sectors.” Source: RevenueBase Database · checked Sep 30, 2026
10	Access Data Installations Ireland LTD	Indirect evidence	Co. Cork, IrelandHQ checked Sep 30, 2026	11-50	21 contacts →
	Indirect evidence “ADI(Ireland) Ltd.” Source: RevenueBase Database · checked Sep 30, 2026
11	Thomond Communications LTD	Indirect evidence	Limerick, IrelandHQ checked Sep 30, 2026	11-50	15 contacts →
	Indirect evidence “Thomond Communications Ltd was established in 2005 to provide a turnkey solution in the Telecomms/Datacomms market.” Source: RevenueBase Database · checked Sep 30, 2026
12	Westlan Networks LTD	Indirect evidence	Limerick, IrelandHQ checked Sep 30, 2026	11-50	14 contacts →
	Indirect evidence “WestLAN Data Networks Ltd is a Data, Voice & Wireless Network Solutions provider with offices in Limerick, Cork & Dublin.” Source: RevenueBase Database · checked Sep 30, 2026
13	GPS IT Services LTD	Indirect evidence	Celbridge, IrelandHQ checked Sep 30, 2026	11-50	9 contacts →
	Indirect evidence “Imagine an IT partnership that transcends conventional service providers – one that prioritizes your business growth over short-term gains.” Source: RevenueBase Database · checked Sep 30, 2026
14	Core Communications Ireland	Indirect evidence	Maynooth, IrelandHQ checked Sep 30, 2026	11-50	8 contacts →
	Indirect evidence “Would you like a telephone system that is guaranteed to deliver a better level of customer service to your clients?” Source: RevenueBase Database · checked Sep 30, 2026
15	CDC Telecom Voice And Data	Indirect evidence	Boyle, IrelandHQ checked Sep 30, 2026	11-50	8 contacts →
	Indirect evidence “CDC Telecom offers a comprehensive range of services across Ireland, including Telephone Systems (both On-Premise and Cloud), Data Networking, Fibre Optic Installation, and CCTV…” Source: RevenueBase Database · checked Sep 30, 2026
16	Arona IT Solutions	Indirect evidence	Kilcullen, IrelandHQ checked Sep 30, 2026	1-10	6 contacts →
	Indirect evidence “Arona has been offering IT support for business for over a decade.” Source: RevenueBase Database · checked Sep 30, 2026
17	Nettraffic	Indirect evidence	Dublin, IrelandHQ checked Sep 30, 2026	1-10	4 contacts →
	Indirect evidence “Net Traffic is in the telephone business.” Source: RevenueBase Database · checked Sep 30, 2026
18	Island Bridge Networks	Partial evidence	Dublin 2, IrelandHQ checked Sep 30, 2026	1-10	4 contacts →
	Partial evidence “Island Bridge Networks was formed in 2014 by two of Ireland's most experienced and leading internet infrastructure experts to provide a full-service network engineering, system…” Source: RevenueBase Database · checked Sep 30, 2026
19	Netcomm Ireland	Indirect evidence	Dublin, IrelandHQ checked Sep 30, 2026	11-50	3 contacts →
	Indirect evidence “Netcomm is one of Irelands leading providers of Communications and Network Solutions.” Source: RevenueBase Database · checked Sep 30, 2026
20	Gemeng	Partial evidence	Dublin, IrelandHQ checked Sep 30, 2026	11-50	3 contacts →
	Partial evidence “Gemeng is an Electrical Engineering Consultancy based out of Dublin.” Source: RevenueBase Database · checked Sep 30, 2026
21	Welltel Enterprise Eyrco	Indirect evidence	Dublin 22, IrelandHQ checked Sep 30, 2026	51-200	2 contacts →
	Indirect evidence “Welltel design, commission and maintain telecoms and connectivity solutions to over customers in Ireland and internationally.” Source: RevenueBase Database · checked Sep 30, 2026
22	Lynch ICT Limited	Indirect evidence	Dublin, IrelandHQ checked Sep 30, 2026	11-50	1 contacts →
	Indirect evidence “Lynch ICT Limited is small services company operating in the information communication technology industry.” Source: RevenueBase Database · checked Sep 30, 2026
23	Lynch Networks	Indirect evidence	Dublin, IrelandHQ checked Sep 30, 2026	11-50	1 contacts →
	Indirect evidence “Lynch Networks are a Ltd, VAT registered company, registered in Ireland and Based in Dublin that specialize in the installation and after support of network infrastructure…” Source: RevenueBase Database · checked Sep 30, 2026
24	Silentus LTD	Indirect evidence	Dublin, IrelandHQ checked Sep 30, 2026	1-10	1 contacts →
	Indirect evidence “With more than 20 years service, Silentus Ltd.” Source: RevenueBase Database · checked Sep 30, 2026
25	Clearwave LTD	Indirect evidence	Dungarvan, IrelandHQ checked Sep 30, 2026	1-10	1 contacts →
	Indirect evidence “ClearWave is one of Ireland's leading Information Communications Technology (ICT) solutions providers.” Source: RevenueBase Database · checked Sep 30, 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: telecommunication 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 telecommunication engineering firms.
Partial evidence: Its own public description names part of telecommunication engineering firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name telecommunication 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 45 telecommunication engineering firms based in Ireland

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Telecommunication engineering firms based in Ireland at a glance

As of Sep 30, 2026

37.3%Verified-email coverage

26.7Average contacts per company

11-50Median size (employees)

15.6%Largest-city concentration · Dublin

Sep 30, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

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 45 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 telecommunication 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 “telecommunication 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 telecommunication 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 telecommunication 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, 448 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 30, 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 telecommunication 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 telecommunication engineering firms are there based in Ireland?

RevenueBase identified 45 telecommunication 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?

KTL, headquartered in Naas, tops this list with the largest team on record.

Which city has the most telecommunication engineering firms?

Dublin leads with 7 headquartered companies, followed by Malahide (2) and Arklow (1).

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 448 verified decision-maker contacts tracked across these 45 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 30, 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.