Company lists · Data refreshed September 2026

Top 25 Atex certified electrical contractors worldwide

Name: Atex certified electrical contractors worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 30, 2026 32,945 companies tracked

RevenueBase identified 32,945 atex certified electrical contractors worldwide as of September 2026 and tracks 288,702 professional contacts across them, including 68,979 with verified work emails. The United States is the largest market and London the largest hub.

This list covers atex certified electrical contractors worldwide, 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. Country and city lists for atex certified electrical contractors follow the table.

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

32,945Companies

288,702Contacts tracked

68,979Verified emails

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The 25 largest atex certified electrical contractors worldwide

Ranked by team size

Top 25 of 32,945 atex certified electrical contractors worldwide, ranked by team size, largest first. Data refreshed Sep 30, 2026. RevenueBase Smart Search rates how each company's information relates to atex certified electrical contractors: 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	MMR Group	Indirect evidence	Baton Rouge, LA, United StatesHQ checked Sep 30, 2026	5,001-10,000	3,186 contacts →
	Indirect evidence “At MMR we believe that no matter how much you achieve, you should never forget where you came from.” Source: RevenueBase Database · checked Sep 30, 2026
2	IES Holdings	Partial evidence	Houston, TX, United StatesHQ checked Sep 30, 2026	5,001-10,000	2,567 contacts →
	Partial evidence “IES Holdings, Inc.(formerly known as Integrated Electrical Services, Inc.) provides electrical contracting services to commercial, industrial, and residential customers in the…” Source: RevenueBase Database · checked Sep 30, 2026
3	Jones Engineering	Indirect evidence	Dublin 4, IrelandHQ checked Sep 30, 2026	1,001-5,000	2,415 contacts →
	Indirect evidence “Jones Engineering is a multi-disciplined engineering contracting company, offering the complete range of engineering and building services installations.” Source: RevenueBase Database · checked Sep 30, 2026
4	Yates Construction	Indirect evidence	Philadelphia, MS, United StatesHQ checked Sep 30, 2026	5,001-10,000	1,713 contacts →
	Indirect evidence “Yates Construction is part of The Yates Companies, Inc.” Source: RevenueBase Database · checked Sep 30, 2026
5	Helix Electric	Strong evidence	San Diego, CA, United StatesHQ checked Sep 30, 2026	1,001-5,000	1,560 contacts →
	Strong evidence “Helix Electric is an award-winning electrical contractor specializing in design-build and highly complex electrical projects throughout the United States.” Source: RevenueBase Database · checked Sep 30, 2026
6	Bergelectric	Partial evidence	Carlsbad, CA, United StatesHQ checked Sep 30, 2026	1,001-5,000	1,182 contacts →
	Partial evidence “Since their inception in 1946, Bergelectric has made its mark on the construction industry by providing the highest quality electrical and technology contracting.” Source: RevenueBase Database · checked Sep 30, 2026
7	Walker Engineering	Partial evidence	Irving, TX, United StatesHQ checked Sep 30, 2026	1,001-5,000	1,049 contacts →
	Partial evidence “Walker Engineering has a solid reputation in the industry that is based on over 45 years of delivering top notch electrical work for a fair and competitive price.” Source: RevenueBase Database · checked Sep 30, 2026
8	Engeko Engenharia E Construção Ltda	Indirect evidence	São Paulo, BrazilHQ checked Sep 30, 2026	1,001-5,000	1,036 contacts →
	Indirect evidence “No mercado desde 2007, atuamos em todo território nacional com foco no segmento industrial e na construção de parcerias a longo prazo, oferecendo diversos tipos de soluções e…” Source: RevenueBase Database · checked Sep 30, 2026
9	MSE Engenharia	Indirect evidence	Londrina, BrazilHQ checked Sep 30, 2026	201-500	826 contacts →
	Indirect evidence “Com 46 anos de profundo know-how, adquirido através do atendimento aos mais diversos segmentos industriais, a MSE Engenharia é uma empresa que se orgulha de hoje ser completa em…” Source: RevenueBase Database · checked Sep 30, 2026
10	Elec-Tech Electrical Contractors	Indirect evidence	Long Beach, CA, United StatesHQ checked Sep 30, 2026	n/a	782 contacts →
	Indirect evidence “WELCOME TO OUR WEBSITE!” Source: RevenueBase Database · checked Sep 30, 2026
11	BK Gulf LLC	Strong evidence	Dubai, United Arab EmiratesHQ checked Sep 30, 2026	5,001-10,000	774 contacts →
	Strong evidence “Established in 1978, BK Gulf LLC is a leading contractor in electrical, mechanical, instrumentation and building services within the UAE & Middle East market.” Source: RevenueBase Database · checked Sep 30, 2026
12	PT Jaya Teknik Indonesia	Indirect evidence	Jakarta, IndonesiaHQ checked Sep 30, 2026	201-500	774 contacts →
	Indirect evidence “Pt.” Source: RevenueBase Database · checked Sep 30, 2026
13	Sigma S.A. Chile	Indirect evidence	Santiago, ChileHQ checked Sep 30, 2026	201-500	757 contacts →
	Indirect evidence “Somos una empresa de excelencia que desarrolla servicios integrales de Estudios Eléctricos, ingeniería, montaje industrial, geomensura, apoyo profesional, inspección técnica y…” Source: RevenueBase Database · checked Sep 30, 2026
14	Prism Electric	Indirect evidence	Garland, TX, United StatesHQ checked Sep 30, 2026	1,001-5,000	687 contacts →
	Indirect evidence “Our story began in 1994 with a simple vision: Build a company that does things right.” Source: RevenueBase Database · checked Sep 30, 2026
15	Baker Group	Partial evidence	Ankeny, IA, United StatesHQ checked Sep 30, 2026	1,001-5,000	655 contacts →
	Partial evidence “Established in 1963, Baker Group is Iowa’s premier full-service specialty contractor-serving commercial, industrial, institutional, and mission-critical markets across the country.” Source: RevenueBase Database · checked Sep 30, 2026
16	The Newtron Group	Partial evidence	Baton Rouge, LA, United StatesHQ checked Sep 30, 2026	1,001-5,000	644 contacts →
	Partial evidence “The Newtron Group is one of the largest privately owned Specialty Industrial Construction companies in the United States and is among the nation's leading Industrial Electrical…” Source: RevenueBase Database · checked Sep 30, 2026
17	Cache Valley Electric	Strong evidence	Logan, UT, United StatesHQ checked Sep 30, 2026	1,001-5,000	627 contacts →
	Strong evidence “As one of the nation’s premier electrical contractors, we don’t just provide high-quality services.” Source: RevenueBase Database · checked Sep 30, 2026
18	M. J. Electric, LLC	Indirect evidence	Iron Mountain, MI, United StatesHQ checked Sep 30, 2026	1,001-5,000	621 contacts →
	Indirect evidence “M.” Source: RevenueBase Database · checked Sep 30, 2026
19	Rogers Electric	Partial evidence	Alpharetta, GA, United StatesHQ checked Sep 30, 2026	1,001-5,000	619 contacts →
	Partial evidence “Rogers Electric is the leading national service provider for all of your construction, rollouts, electrical, and lighting needs.” Source: RevenueBase Database · checked Sep 30, 2026
20	PAR Electrical Contractors, LLC	Indirect evidence	Kansas City, MO, United StatesHQ checked Sep 30, 2026	1,001-5,000	606 contacts →
	Indirect evidence “PAR, a Quanta Services company, offers a full range of construction services for substations, overhead and underground distribution and transmission lines, engineering, design…” Source: RevenueBase Database · checked Sep 30, 2026
21	Alterman, INC	Partial evidence	Live Oak, TX, United StatesHQ checked Sep 30, 2026	501-1,000	597 contacts →
	Partial evidence “Since 1923, Alterman has provided electrical construction on many of San Antonio and Austin's most impressive landmarks and contemporary structures.” Source: RevenueBase Database · checked Sep 30, 2026
22	Colonialwebb	Indirect evidence	Richmond, VA, United StatesHQ checked Sep 30, 2026	1,001-5,000	571 contacts →
	Indirect evidence “ColonialWebb is built on a simple belief: when people feel like they belong and have a purpose, they can achieve almost anything.” Source: RevenueBase Database · checked Sep 30, 2026
23	CSI Electrical Contractors, INC	Partial evidence	Santa Fe Springs, CA, United StatesHQ checked Sep 30, 2026	1,001-5,000	560 contacts →
	Partial evidence “Founded in 1990, CSI has become a leader in highly technical and innovative electrical design and construction.” Source: RevenueBase Database · checked Sep 30, 2026
24	Nrgi Elcon	Partial evidence	Brabrand, DenmarkHQ checked Sep 30, 2026	1,001-5,000	546 contacts →
	Partial evidence “EL:CON is a solid, nationwide electrical installation company – both in regards to competences and economy.” Source: RevenueBase Database · checked Sep 30, 2026
25	Morrow-Meadows Corporation	Partial evidence	City Of Industry, CA, United StatesHQ checked Sep 30, 2026	1,001-5,000	532 contacts →
	Partial evidence “With over six decades of experience, Morrow-Meadows Corporation (MMC) is a full-service electrical contracting company able to fulfill our customer’s every electrical need, no…” 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: atex certified electrical contractors. 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 atex certified electrical contractors.
Partial evidence: Its own public description names part of atex certified electrical contractors, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name atex certified electrical contractors. 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 32,945 atex certified electrical contractors worldwide

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Atex certified electrical contractors worldwide at a glance

As of Sep 30, 2026

23.9%Verified-email coverage

8.8Average contacts per company

1-10Median size (employees)

0.7%Largest-city concentration · London

Sep 30, 2026Page data refreshed

Companies by employee count

1-10

16,294

11-50

11,324

51-200

3,766

201-500

756

501-1,000

206

1,001-5,000

136

5,001-10,000

10001+

Email recency is reported on each country list linked below.

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 atex certified electrical contractors, 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.
Coverage: Every country. Country and city lists for atex certified electrical contractors are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “atex certified electrical contractors”. 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 atex certified electrical contractors), 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 atex certified electrical contractors, and records with no verified work email.
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, 68,979 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.

Atex certified electrical contractors by location

90 lists · largest first

Every Atex certified electrical contractors list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

Cities

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 atex certified electrical contractors, 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 atex certified electrical contractors are there worldwide?

RevenueBase identified 32,945 atex certified electrical contractors worldwide 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?

MMR Group, headquartered in Baton Rouge, tops this list with the largest team on record.

Which country has the most atex certified electrical contractors?

The United States leads with 8,817 companies, followed by the United Kingdom (3,987) and Australia (1,704). Every atex certified electrical contractors list by country and city is linked on this page.

Which city has the most atex certified electrical contractors?

London leads with 247 headquartered companies, followed by Sao Paulo (198) and Houston (146).

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 68,979 verified decision-maker contacts tracked across these 32,945 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.