Company lists · Data refreshed September 2026

Top 25 Grid interconnection consulting firms worldwide

Name: Grid interconnection consulting firms worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 8,066 companies tracked

RevenueBase identified 8,066 grid interconnection consulting firms worldwide as of September 2026 and tracks 103,822 professional contacts across them, including 31,812 with verified work emails. The United States is the largest market and Madrid the largest hub.

This list covers grid interconnection consulting firms 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 28, 2026. Country and city lists for grid interconnection consulting firms 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 28, 2026 86% judged on-target in blind review

8,066Companies

103,822Contacts tracked

31,812Verified emails

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The 25 largest grid interconnection consulting firms worldwide

Ranked by team size

Top 25 of 8,066 grid interconnection consulting firms worldwide, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to grid interconnection consulting 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	Tennet Germany	Partial evidence	Bayreuth, GermanyHQ checked Sep 28, 2026	5,001-10,000	2,511 contacts →
	Partial evidence “TenneT is a leading European grid operator.” Source: RevenueBase Database · checked Sep 28, 2026
2	Tabocas Participações Empreendimentos S A	Indirect evidence	Belo Horizonte, BrazilHQ checked Sep 28, 2026	10001+	2,204 contacts →
	Indirect evidence “Fundada em abril de em Belo Horizonte (MG), a Tabocas é referência nacional na modalidade EPC Full, dentro dos setores de construção e engenharia civil, com foco de atuação na…” Source: RevenueBase Database · checked Sep 28, 2026
3	Omexom	Indirect evidence	Nanterre, FranceHQ checked Sep 28, 2026	5,001-10,000	1,903 contacts →
	Indirect evidence “With today's global energy sector undergoing constant change, Omexom works with its clients in delivering on the promises of the energy transition.” Source: RevenueBase Database · checked Sep 28, 2026
4	Enercon Services, INC	Indirect evidence	Kennesaw, GA, United StatesHQ checked Sep 28, 2026	1,001-5,000	1,865 contacts →
	Indirect evidence “ENERCON is a multi-discipline engineering and environmental engineering support services firm focused on delivering safe and efficient solutions for the power, data center and…” Source: RevenueBase Database · checked Sep 28, 2026
5	Engelmig Energia	Indirect evidence	Belo Horizonte, BrazilHQ checked Sep 28, 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 28, 2026
6	Westwood Professional Services	Indirect evidence	Plano, TX, United StatesHQ checked Sep 28, 2026	1,001-5,000	1,661 contacts →
	Indirect evidence “At Westwood, our purpose is to create a better world for people through our work.” Source: RevenueBase Database · checked Sep 28, 2026
7	Steag Energy Services India Pvt. LTD	Indirect evidence	Noida, IndiaHQ checked Sep 28, 2026	1,001-5,000	1,572 contacts →
	Indirect evidence “STEAG Energy Services India, established in 2001 as a wholly owned subsidiary of STEAG GmbH, Germany, is now part of the Bluspring Enterprises Limited, India’s integrated…” Source: RevenueBase Database · checked Sep 28, 2026
8	Medhaj Techno Concept Pvt. LTD	Indirect evidence	IndiaHQ checked Sep 28, 2026	1,001-5,000	1,136 contacts →
	Indirect evidence “Medhaj Techno Concept Pvt.” Source: RevenueBase Database · checked Sep 28, 2026
9	Willdan	Partial evidence	Anaheim, CA, United StatesHQ checked Sep 28, 2026	1,001-5,000	851 contacts →
	Partial evidence “Willdan (NASDAQ: WLDN) provides professional consulting and technical services to utilities, public agencies and private industry throughout the United States.” Source: RevenueBase Database · checked Sep 28, 2026
10	EPCL	Indirect evidence	Brumado, BrazilHQ checked Sep 28, 2026	1,001-5,000	741 contacts →
	Indirect evidence “Empresa especializada em estudo de viabilidade, levantamento e georreferenciamento topográfico, elaboração de projetos, construção e manutenção de redes de distribuição em média e…” Source: RevenueBase Database · checked Sep 28, 2026
11	Baker Electric	Indirect evidence	Escondido, CA, United StatesHQ checked Sep 28, 2026	501-1,000	680 contacts →
	Indirect evidence “Baker Electric is a full-service electrical contractor and energy infrastructure expert headquartered in Escondido, California.” Source: RevenueBase Database · checked Sep 28, 2026
12	Vikran Engineering LTD	Indirect evidence	Thane, IndiaHQ checked Sep 28, 2026	501-1,000	661 contacts →
	Indirect evidence “M/s VIKRAN Engineering Ltd is a reputed and established engineering company specializing in providing comprehensive solutions in the fields of renewable energy, engineering…” Source: RevenueBase Database · checked Sep 28, 2026
13	Electric Power Engineers	Partial evidence	Austin, TX, United StatesHQ checked Sep 28, 2026	501-1,000	630 contacts →
	Partial evidence “Electric Power Engineers (EPE) is a global advisory and engineering firm advancing grid reliability, resilience, flexibility, and affordability.” Source: RevenueBase Database · checked Sep 28, 2026
14	Grupotec	Indirect evidence	Valencia, SpainHQ checked Sep 28, 2026	501-1,000	538 contacts →
	Indirect evidence “GRUPOTEC - Empresa multidisciplinar de ingeniería y arquitectura y líder en el sector de la energía fotovoltaica.” Source: RevenueBase Database · checked Sep 28, 2026
15	Revergy	Indirect evidence	Seville, SpainHQ checked Sep 28, 2026	501-1,000	502 contacts →
	Indirect evidence “REVERGY nace mediante un proyecto de profesionales procedentes de diferentes ámbitos del sector de las energías renovables con el fin de presentar un proyecto marcado por la…” Source: RevenueBase Database · checked Sep 28, 2026
16	Natural Power	Indirect evidence	Castle Douglas, United KingdomHQ checked Sep 28, 2026	501-1,000	500 contacts →
	Indirect evidence “Natural Power is a leading independent consultancy and service provider for the renewable energy sector.” Source: RevenueBase Database · checked Sep 28, 2026
17	RRC Companies	Indirect evidence	Round Rock, TX, United StatesHQ checked Sep 28, 2026	201-500	494 contacts →
	Indirect evidence “RRC is a top-tier designer of utility-scale wind, solar, energy storage, data center, and oil & gas projects in the US and select international markets.” Source: RevenueBase Database · checked Sep 28, 2026
18	Borea Construction	Indirect evidence	Lévis, QC, CanadaHQ checked Sep 28, 2026	201-500	455 contacts →
	Indirect evidence “Borea Construction est le leader nord-américain dans la construction d'énergie renouvelable.” Source: RevenueBase Database · checked Sep 28, 2026
19	Cotesa Engenharia	Indirect evidence	Florianópolis, BrazilHQ checked Sep 28, 2026	201-500	449 contacts →
	Indirect evidence “A COTESA é especialista na Engenharia de Operação & Manutenção de ativos elétricos de Geração e Transmissão de energia.” Source: RevenueBase Database · checked Sep 28, 2026
20	Techserv Engineering	Partial evidence	Tyler, TX, United StatesHQ checked Sep 28, 2026	501-1,000	448 contacts →
	Partial evidence “TechServ Consulting and Training, Ltd was established in November 1992.” Source: RevenueBase Database · checked Sep 28, 2026
21	E-J Electric Installation CO	Indirect evidence	Long Island City, NY, United StatesHQ checked Sep 28, 2026	1,001-5,000	444 contacts →
	Indirect evidence “The E-J Group is active in all facets of electrical contracting, bringing experience, expertise, and a national reputation to projects that range in size up to more than $1…” Source: RevenueBase Database · checked Sep 28, 2026
22	Finulent Solutions	Indirect evidence	Mumbai, IndiaHQ checked Sep 28, 2026	501-1,000	442 contacts →
	Indirect evidence “Finulent Solutions is a design engineering firm specializing in the renewable energy sector.” Source: RevenueBase Database · checked Sep 28, 2026
23	Energie Data Services Nederland Edsn B.V	Indirect evidence	Amersfoort, NetherlandsHQ checked Sep 28, 2026	501-1,000	427 contacts →
	Indirect evidence “Energie Data Services Nederland (EDSN) werkt samen met de regionale netbeheerders, TenneT en GTS aan de centrale marktfacilitering voor de energiesector.” Source: RevenueBase Database · checked Sep 28, 2026
24	Fichtner Consulting Engineers LTD	Indirect evidence	Stockport, United KingdomHQ checked Sep 28, 2026	51-200	418 contacts →
	Indirect evidence “Fichtner is one of the world's leading independent engineering consultancy firms.” Source: RevenueBase Database · checked Sep 28, 2026
25	Energyscape Renewables	Indirect evidence	Denver, United StatesHQ checked Sep 28, 2026	501-1,000	379 contacts →
	Indirect evidence “Established in 2019.” Source: RevenueBase Database · checked Sep 28, 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: grid interconnection consulting 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 grid interconnection consulting firms.
Partial evidence: Its own public description names part of grid interconnection consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name grid interconnection consulting 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 8,066 grid interconnection consulting firms worldwide

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Grid interconnection consulting firms worldwide at a glance

As of Sep 28, 2026

30.6%Verified-email coverage

12.9Average contacts per company

1-10Median size (employees)

0.9%Largest-city concentration · Madrid

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

4,729

11-50

2,395

51-200

647

201-500

157

501-1,000

1,001-5,000

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 grid interconnection consulting 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.
Coverage: Every country. Country and city lists for grid interconnection consulting firms are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “grid interconnection consulting 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 grid interconnection consulting 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 grid interconnection consulting firms, 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, 31,812 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 28, 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.

Grid interconnection consulting firms by location

43 lists · largest first

Every Grid interconnection consulting firms 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 grid interconnection consulting 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 grid interconnection consulting firms are there worldwide?

RevenueBase identified 8,066 grid interconnection consulting firms 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?

Tennet Germany, headquartered in Bayreuth, tops this list with the largest team on record.

Which country has the most grid interconnection consulting firms?

The United States leads with 1,268 companies, followed by Brazil (688) and India (452). Every grid interconnection consulting firms list by country and city is linked on this page.

Which city has the most grid interconnection consulting firms?

Madrid leads with 76 headquartered companies, followed by Sao Paulo (75) and London (63).

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 31,812 verified decision-maker contacts tracked across these 8,066 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 28, 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.