Company lists · Data refreshed October 2026

Top 25 High voltage electrical contractors worldwide

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

Compiled by the RevenueBase Data Team Data refreshed Oct 14, 2026 20,933 companies tracked

RevenueBase identified 20,933 company matches for high voltage electrical contractors worldwide as of October 2026 and tracks 243,403 professional contacts across them, including 59,053 with verified work emails. The United States is the largest market and Sao Paulo the largest hub.

This list covers company matches for high voltage electrical contractors worldwide, 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 14, 2026. Country and city lists for high voltage electrical contractors follow the table.

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 14, 2026 How this list was built

20,933Companies

243,403Contacts tracked

59,053Verified emails

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The 25 largest high voltage electrical contractors worldwide

Ranked by team size

Top 25 of 20,933 company matches for high voltage electrical contractors worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 14, 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	Quanta Services, INC	Exact match	Houston, TX, United StatesHQ recorded Oct 14, 2026	10001+	1,901 contacts →
	Exact match “Quanta Services (NYSE: PWR) is the leading specialty contractor with the largest and highly trained skilled workforce in North America, providing fully integrated solutions for…” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase
2	Grupo RCS	Exact match	Brasilia, BrazilHQ recorded Oct 14, 2026	5,001-10,000	1,870 contacts →
	Exact match “A RCS é uma empresa de Engenharia especializada em oferecer serviços técnicos de missão crítica com alta tecnologia aplicada, para clientes que necessitam manter suas atividades…” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase
3	Engelmig Energia	Exact match	Belo Horizonte, BrazilHQ recorded Oct 14, 2026	5,001-10,000	1,854 contacts →
	Exact match “A Engelmig foi fundada em 1985 com o objetivo de prestar serviços de engenharia em redes de distribuição de energia elétrica.” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase
4	Kemp & Lauritzen A S	Exact match	Albertslund, DenmarkHQ recorded Oct 14, 2026	1,001-5,000	1,634 contacts →
	Exact match “Kemp & Lauritzen arbejder med tekniske installationer med stor spændvidde og høj grad af specialisering.” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase
5	Helix Electric	Exact match	San Diego, CA, United StatesHQ recorded Oct 14, 2026	1,001-5,000	1,618 contacts →
	Exact match “Helix Electric is an award-winning electrical contractor specializing in design-build and highly complex electrical projects throughout the United States.” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase
6	Kirby Group Engineering	Exact match	Limerick, IrelandHQ recorded Oct 14, 2026	1,001-5,000	1,518 contacts →
	Exact match “Founded in 1964, Kirby is a leading Mechanical and Electrical engineering contractor with operations in Ireland, the UK, mainland Europe and South Africa.” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase
7	Genusplus Group	Exact match	Belmont, United StatesHQ recorded Oct 14, 2026	1,001-5,000	1,374 contacts →
	Exact match “GenusPlus Group (ASX:GNP) is a national force in power and communications infrastructure.” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase
8	H&mv Engineering	Exact match	Limerick, FranceHQ recorded Oct 14, 2026	1,001-5,000	1,269 contacts →
	Exact match “H & MV Engineering is a leading global provider of Specialist High Voltage Design, Engineering and Construction Services across a variety of key sectors.” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase
9	Valard Construction	Exact match	Edmonton, AB, CanadaHQ recorded Oct 14, 2026	1,001-5,000	1,135 contacts →
	Exact match “Headquartered in Edmonton, Alberta - Valard is Canada’s premier utility contractor, with full-service capabilities for transmission, distribution, substations, foundations…” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase
10	MYR Group	Exact match	Thornton, CO, United StatesHQ recorded Oct 14, 2026	5,001-10,000	1,111 contacts →
	Exact match “With roots dating to 1891 and employees, MYR Group Inc.” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase
11	Dashiell Corporation	Exact match	Houston, TX, United StatesHQ recorded Oct 14, 2026	1,001-5,000	1,060 contacts →
	Exact match “Dashiell is a leading national provider of technical services to the electric utility, power generation, industrial, renewable and energy industries.” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase
12	Suir Engineering	Exact match	Waterford, GermanyHQ recorded Oct 14, 2026	1,001-5,000	908 contacts →
	Exact match “Suir Engineering, a trusted partner in excellence with over 40 years of international experience, specialises in electrical, mechanical, instrumentation and high voltage.” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase
13	Electrical Consultants, INC	Exact match	Billings, MT, United StatesHQ recorded Oct 14, 2026	1,001-5,000	904 contacts →
	Exact match “Electrical Consultants, Inc.(ECI) is an employee-owned, national provider of high voltage transmission, substation, and distribution solutions.” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase
14	Archkey Solutions	Exact match	St. Louis, MO, United StatesHQ recorded Oct 14, 2026	1,001-5,000	880 contacts →
	Exact match “ArchKey, one of the largest privately held specialty trade installation and facilities services companies in the United States, is a leader in designing, building, and maintaining…” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase
15	Qirion	Exact match	Arnhem, NetherlandsHQ recorded Oct 14, 2026	1,001-5,000	849 contacts →
	Exact match “Wij zijn experts in hoogspanning.” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase
16	Flanders	Exact match	Evansville, IN, United StatesHQ recorded Oct 14, 2026	501-1,000	828 contacts →
	Exact match “FLANDERS, Leverage our legacy.” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase
17	Fredon	Exact match	Silverwater, AustraliaHQ recorded Oct 14, 2026	1,001-5,000	821 contacts →
	Exact match “Fredon is an Australian leader in Electrical, HVAC, Infrastructure and Technology services, backed by 24/7 national maintenance capability.” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase
18	Elec-Tech Electrical Contractors	Exact match	Long Beach, CA, United StatesHQ recorded Oct 14, 2026	n/a	778 contacts →
	Exact match “WELCOME TO OUR WEBSITE!” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase
19	AL Ahleia Switchgear Co. Kscc	Exact match	Sabhan, KuwaitHQ recorded Oct 14, 2026	1,001-5,000	735 contacts →
	Exact match “Established in 1982 by Sayed Hamid Behbehani & Sons, Kuwait.* First Kuwaiti company to be awarded with ISO 9001 back in 1995 by DNV.* Company certified for ISO/TS 29001:2010…” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase
20	Freedom	Exact match	Leeds, United KingdomHQ recorded Oct 14, 2026	1,001-5,000	728 contacts →
	Exact match “Freedom is a leading provider of facilities and power engineering services.” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase
21	Willbros	Exact match	Houston, TX, United StatesHQ recorded Oct 14, 2026	10001+	724 contacts →
	Exact match “Primoris is a specialty energy infrastructure contractor serving the oil and gas and power industries with offerings that primarily include construction, maintenance and…” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase
22	Comfica Soluciones Integrales S.L	Exact match	Fuenlabrada, SpainHQ recorded Oct 14, 2026	201-500	720 contacts →
	Exact match “Empresa especializada en la ingenieria, desarrollo, construccion, instalación, y puesta en marcha de instalaciones de telecomunicaciones, electricidad, señalización, redes de…” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase
23	Prism Electric	Exact match	Garland, TX, United StatesHQ recorded Oct 14, 2026	1,001-5,000	717 contacts →
	Exact match “Our story began in 1994 with a simple vision: Build a company that does things right.” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase
24	Baker Electric	Exact match	Escondido, CA, United StatesHQ recorded Oct 14, 2026	501-1,000	704 contacts →
	Exact match “Baker Electric is a full-service electrical contractor and energy infrastructure expert headquartered in Escondido, California.” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase
25	Mass. Electric Construction CO	Exact match	North America, TX, United StatesHQ recorded Oct 14, 2026	1,001-5,000	685 contacts →
	Exact match “Mass.” Recorded in the RevenueBase company graph · Oct 14, 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 “high voltage electrical contractors”. 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 20,933 high voltage electrical contractors worldwide

See the full list, filter by size, metro and specialty, and access 59,053 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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High voltage electrical contractors worldwide at a glance

As of Oct 14, 2026

24.3%Verified-email coverage

11.6Average contacts per company

11-50Median size (employees)

0.5%Largest-city concentration · Sao Paulo

Oct 14, 2026Page data refreshed

Companies by employee count

1-10

9,316

11-50

7,694

51-200

2,713

201-500

620

501-1,000

194

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

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.
Coverage: Every country. Country and city lists for high voltage electrical contractors are linked below.
What qualifies: Company records worldwide whose business descriptions match “high voltage electrical contractors” 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. 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 59,053 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 14, 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.

High voltage electrical contractors by location

56 lists · largest first

Every High voltage 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 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 “high voltage electrical contractors”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many high voltage electrical contractors are there worldwide?

RevenueBase identified 20,933 company matches for high voltage electrical contractors worldwide 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?

Quanta Services, INC tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which country has the most high voltage electrical contractors?

The United States leads with 5,443 companies, followed by the United Kingdom (1,616) and Italy (1,207). Every high voltage electrical contractors list by country and city is linked on this page.

Which city has the most high voltage electrical contractors?

Sao Paulo leads with 114 company records, followed by Houston (104) and London (98).

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 59,053 professional contacts with verified work emails tracked across these 20,933 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 14, 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.