Company lists · Data refreshed September 2026

Top 25 Electrical testing and commissioning firms based in Brazil

Name: Electrical testing and commissioning firms based in Brazil
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 1,297 companies tracked

RevenueBase identified 1,297 electrical testing and commissioning firms headquartered in Brazil as of September 2026 and tracks 13,110 professional contacts across them, including 1,446 with verified work emails. Sao Paulo is the largest hub.

This list covers electrical testing and commissioning firms headquartered in Brazil, 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 19, 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 19, 2026 86% judged on-target in blind review

1,297Companies

13,110Contacts tracked

1,446Verified emails

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The 25 largest electrical testing and commissioning firms based in Brazil

Ranked by team size

Top 25 of 1,297 electrical testing and commissioning firms based in Brazil, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to electrical testing and commissioning 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	Engelmig Energia	Indirect evidence	Belo Horizonte, BrazilHQ checked Sep 19, 2026	5,001-10,000	1,818 contacts →
	Indirect evidence “A Engelmig foi fundada em 1985 com o objetivo de prestar serviços de engenharia em redes de distribuição de energia elétrica.” Source: RevenueBase Database · checked Sep 19, 2026
2	Temon Técnica DE Montagens E Construções	Indirect evidence	Sao Paulo, BrazilHQ checked Sep 19, 2026	1,001-5,000	587 contacts →
	Indirect evidence “Desde 1978 atuando na execução de Instalações Elétricas e Hidráulicas, a Temon conseguiu firmar sua marca nesse mercado com participação em mais de obras por todo Brasil e…” Source: RevenueBase Database · checked Sep 19, 2026
3	GTEL	Partial evidence	Sao Paulo, BrazilHQ checked Sep 19, 2026	1,001-5,000	508 contacts →
	Partial evidence “Since 1975, GTEL has been providing services regarding assembly, installation and maintenance in the electrical, mechanical, utilities and fire protection areas.” Source: RevenueBase Database · checked Sep 19, 2026
4	STN Empreendimentos E Construções	Indirect evidence	Areal, BrazilHQ checked Sep 19, 2026	501-1,000	471 contacts →
	Indirect evidence “A STN EMPREENDIMENTOS E CONSTRUÇÕES atua há mais de 30 anos nas áreas de engenharia elétrica, de eletromecânica e de engenharia civil em todo território nacional.” Source: RevenueBase Database · checked Sep 19, 2026
5	MI Electric Brasil	Partial evidence	Macaé, BrazilHQ checked Sep 19, 2026	201-500	395 contacts →
	Partial evidence “MI Electric Brasil is a company specialized in electrical engineering, controls and automation, focusing on provide energy supplies and equipment maintenance solutions in order to…” Source: RevenueBase Database · checked Sep 19, 2026
6	Tereme Engenharia	Indirect evidence	Serra, BrazilHQ checked Sep 19, 2026	501-1,000	391 contacts →
	Indirect evidence “CONTRATOS DE MANUTENÇÃO A Tereme oferece a seus clientes soluções de manutenção global ou parcial dos equipamentos e instalações elétricas de uma planta industrial.” Source: RevenueBase Database · checked Sep 19, 2026
7	Dolp Engenharia	Indirect evidence	Aparecida De Goiânia, BrazilHQ checked Sep 19, 2026	1,001-5,000	337 contacts →
	Indirect evidence “Com mais de 45 anos de know-how no setor elétrico, a DOLP Engenharia iniciou suas atividades em novembro de 2012, no Estado de Goiás, consolidando-se como referência em engenharia…” Source: RevenueBase Database · checked Sep 19, 2026
8	TDM Service & Solutions	Partial evidence	Bragança Paulista, BrazilHQ checked Sep 19, 2026	201-500	218 contacts →
	Partial evidence “We have been in the market for over 20 years serving the main industrial and commercial markets, gaining prominent positions in the segments of Engineering, Commissioning of…” Source: RevenueBase Database · checked Sep 19, 2026
9	Marte Engenharia Ltda	Indirect evidence	Rio De Janeiro, BrazilHQ checked Sep 19, 2026	1,001-5,000	153 contacts →
	Indirect evidence “A Marte Engenharia Ltda é uma empresa de engenharia que oferece serviços de consultoria e projetos de engenharia nas áreas de geração, transmissão e distribuição de energia…” Source: RevenueBase Database · checked Sep 19, 2026
10	Novatec Instalações	Indirect evidence	São Paulo, BrazilHQ checked Sep 19, 2026	51-200	117 contacts →
	Indirect evidence “No mercado desde 2007, a Novatec trabalha diretamente com empresas da Construção Civil, Indústrias e Incorporadoras oferecendo serviços de Instalações Elétricas e Hidráulicas…” Source: RevenueBase Database · checked Sep 19, 2026
11	Eletromw Electrical Solutions	Partial evidence	Joinville, BrazilHQ checked Sep 19, 2026	51-200	112 contacts →
	Partial evidence “ELECTRICAL ENGINEERING: Commercial and industrial projects and consultancy serving our customers with excellence, agility and high level of quality; ELECTRICAL INSTALLATIONS AND…” Source: RevenueBase Database · checked Sep 19, 2026
12	MP Trafos Engenharia	Indirect evidence	Volta Redonda, BrazilHQ checked Sep 19, 2026	1,001-5,000	103 contacts →
	Indirect evidence “A MP Trafos Engenharia nasceu em 1993, na cidade de Pindamonhangaba, para atender a crescente demanda por manutenção industrial especializada.” Source: RevenueBase Database · checked Sep 19, 2026
13	Iosi Energia	Indirect evidence	São Paulo, BrazilHQ checked Sep 19, 2026	51-200	100 contacts →
	Indirect evidence “Com 25 anos de atuação no mercado, a Iosi Energia oferece serviços completos em engenharia elétrica, automação e telecomunicações, atendendo as principais demandas de usinas…” Source: RevenueBase Database · checked Sep 19, 2026
14	Energy Substation Services	Indirect evidence	Itupeva, BrazilHQ checked Sep 19, 2026	201-500	92 contacts →
	Indirect evidence “Construção de subestações Projetos Ensaios elétricos Comissionamento Manutenção Montagem de equipamentos Enchimento de gás SF6 Venda e aluguel de equipamentos Retrofit de…” Source: RevenueBase Database · checked Sep 19, 2026
15	Adkl Zeller	Indirect evidence	Rio De Janeiro, BrazilHQ checked Sep 19, 2026	51-200	80 contacts →
	Indirect evidence “Fundada em 1996, no Rio de Janeiro, a ADKL Zeller é referência em engenharia elétrica e automação, oferecendo soluções completas para projetos de missão crítica e de alta…” Source: RevenueBase Database · checked Sep 19, 2026
16	Energoato Eletricidade Ltda	Indirect evidence	Aparecida De Goiânia, BrazilHQ checked Sep 19, 2026	51-200	75 contacts →
	Indirect evidence “Obras civis e Montagens eletromecânicas em Subestações de até 500 kV, Linhas de Transmissão de até 230 kV, Usinas Termoelétricas, Hidrelétricas e Eólicas, testes/ensaios em relés…” Source: RevenueBase Database · checked Sep 19, 2026
17	Pontual Energy Electric System Ltda	Strong evidence	Sao Paulo, BrazilHQ checked Sep 19, 2026	51-200	72 contacts →
	Strong evidence “Construction solutions, preventive and corrective maintenance, electrical and electromechanical assemblies, O&M, Commissioning of equipment, panels and SPCS.” Source: RevenueBase Database · checked Sep 19, 2026
18	Smart Electric Engenharia E Sistemas Ltda	Indirect evidence	Guarulhos, BrazilHQ checked Sep 19, 2026	51-200	71 contacts →
	Indirect evidence “Somos uma empresa de serviços de engenharia elétrica, com grande experiência em usinas hidrelétricas, termoelétricas, parques eólicos e subestações de transmissão e distribuição…” Source: RevenueBase Database · checked Sep 19, 2026
19	Megasteam Oficial	Indirect evidence	Sao Paulo, BrazilHQ checked Sep 19, 2026	201-500	68 contacts →
	Indirect evidence “A Megasteam é uma empresa reconhecida pela qualidade, confiabilidade e tecnologia empregada na prestação de serviços para edificações há mais de 33 anos.” Source: RevenueBase Database · checked Sep 19, 2026
20	Engepower Engenharia E Comércio Ltda	Indirect evidence	Barueri, BrazilHQ checked Sep 19, 2026	51-200	66 contacts →
	Indirect evidence “Fundada em Agosto de 1995, a EngePower é uma empresa que atua no mercado de Eletricidade Industrial e Sistemas Elétricos de Potência.” Source: RevenueBase Database · checked Sep 19, 2026
21	Rigava Engenharia E Automacao Industrial	Indirect evidence	Piracicaba, BrazilHQ checked Sep 19, 2026	51-200	66 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 19, 2026
22	MP Engenharia Elétrica	Indirect evidence	Piracicaba, BrazilHQ checked Sep 19, 2026	51-200	53 contacts →
	Indirect evidence “Instalações elétricas / Manutenção elétrica / Projetos elétricos / Análises e Ensaios / SPDA / Termografia / Retrofit / Montagens industriais / Automação / Treinamentos” Source: RevenueBase Database · checked Sep 19, 2026
23	Austral Engenharia Especialista EM Projetos, Montagem E Manutenção Industrial	Indirect evidence	Catu, BrazilHQ checked Sep 19, 2026	51-200	51 contacts →
	Indirect evidence “Soluções completas em engenharia elétrica, automação, montagem de subestações, SPDA e painéis industriais.” Source: RevenueBase Database · checked Sep 19, 2026
24	Focus Engenharia Elétrica	Partial evidence	Santa Bárbara D' Oeste, BrazilHQ checked Sep 19, 2026	51-200	49 contacts →
	Partial evidence “Focus Engenharia Elétrica specializes in the execution of highly complex technical services in industrial and power electrical systems, serving different segments with a high…” Source: RevenueBase Database · checked Sep 19, 2026
25	On7 Engenharia	Indirect evidence	Blumenau, BrazilHQ checked Sep 19, 2026	51-200	45 contacts →
	Indirect evidence “ON7 Engenharia \| Excelência em projetos de engenharia elétrica Com mais de 20 anos de expertise, a ON7 Engenharia é reconhecida pelo atendimento especializado no setor de…” Source: RevenueBase Database · checked Sep 19, 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: electrical testing and commissioning 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 electrical testing and commissioning firms.
Partial evidence: Its own public description names part of electrical testing and commissioning firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name electrical testing and commissioning 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 1,297 electrical testing and commissioning firms based in Brazil

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Electrical testing and commissioning firms based in Brazil at a glance

As of Sep 19, 2026

11.0%Verified-email coverage

10.1Average contacts per company

1-10Median size (employees)

11.0%Largest-city concentration · Sao Paulo

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

714

11-50

421

51-200

116

201-500

501-1,000

1,001-5,000

5,001-10,000

Email recency for this list is measured worldwide rather than for Brazil, so it is reported there. Company counts and contact totals on this page are exact for Brazil, over 1,297 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 electrical testing and commissioning 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 Brazil whose own description of what they do matches “electrical testing and commissioning 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 electrical testing and commissioning 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 electrical testing and commissioning firms, and records with no verified work email. Companies headquartered outside Brazil 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, 1,446 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 19, 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.

Electrical testing and commissioning firms by metro

Electrical testing and commissioning firms in Sao Paulo143
Electrical testing and commissioning firms in Rio De Janeiro49
Electrical testing and commissioning firms in Belo Horizonte35
Electrical testing and commissioning firms in Curitiba34
Electrical testing and commissioning firms in Guarulhos26

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 electrical testing and commissioning 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 electrical testing and commissioning firms are there based in Brazil?

RevenueBase identified 1,297 electrical testing and commissioning firms headquartered in Brazil 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?

Engelmig Energia, headquartered in Belo Horizonte, tops this list with the largest team on record.

Which city has the most electrical testing and commissioning firms?

Sao Paulo leads with 143 headquartered companies, followed by Rio De Janeiro (49) and Belo Horizonte (35).

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 1,446 verified decision-maker contacts tracked across these 1,297 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 19, 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.