Company lists · Data refreshed September 2026

Top 25 Power plant construction contractors based in Spain

Name: Power plant construction contractors based in Spain
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 17, 2026 167 companies tracked

RevenueBase identified 167 power plant construction contractors headquartered in Spain as of September 2026 and tracks 19,055 professional contacts across them, including 3,203 with verified work emails. Madrid is the largest hub.

This list covers power plant construction contractors headquartered in Spain, 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 17, 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 17, 2026 86% judged on-target in blind review

167Companies

19,055Contacts tracked

3,203Verified emails

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The 25 largest power plant construction contractors based in Spain

Ranked by team size

Top 25 of 167 power plant construction contractors based in Spain, ranked by team size, largest first. Data refreshed Sep 17, 2026. RevenueBase Smart Search rates how each company's information relates to power plant construction 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	Tecnicas Reunidas	Strong evidence	Madrid, SpainHQ checked Sep 17, 2026	10001+	10,588 contacts →
	Strong evidence “TR is an international general contractor engaged in the engineering and construction of industrial facilities in the fields of-Oil & Gas -Refining & Petrochemical -Power…” Source: RevenueBase Database · checked Sep 17, 2026
2	Dragados Offshore	Indirect evidence	11510 Puerto Real, SpainHQ checked Sep 17, 2026	1,001-5,000	1,348 contacts →
	Indirect evidence “Founded in 1972, Dragados Offshore S.A.” Source: RevenueBase Database · checked Sep 17, 2026
3	GES	Indirect evidence	Zamudio, SpainHQ checked Sep 17, 2026	501-1,000	702 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 17, 2026
4	Sampol	Indirect evidence	Palma, SpainHQ checked Sep 17, 2026	1,001-5,000	581 contacts →
	Indirect evidence “SAMPOL is an independent, multinational, family owned company founded in 1934 and a leader in the implementation of Energy projects, Electrical installations, Telecommunications…” Source: RevenueBase Database · checked Sep 17, 2026
5	IGNIS	Indirect evidence	Madrid, SpainHQ checked Sep 17, 2026	501-1,000	533 contacts →
	Indirect evidence “We are a vertically integrated energy company and offer tailored solutions for large consumers and for new energy demands, such as data centers.” Source: RevenueBase Database · checked Sep 17, 2026
6	Tecnatom	Strong evidence	San Sebastian De Los Reyes, SpainHQ checked Sep 17, 2026	501-1,000	487 contacts →
	Strong evidence “TECNATOM was set up in 1957 as a Spanish engineering company specialising in guaranteeing the operation and maintenance of nuclear power plants to the highest levels of safety.” Source: RevenueBase Database · checked Sep 17, 2026
7	Intecsa Industrial	Partial evidence	Madrid, SpainHQ checked Sep 17, 2026	501-1,000	372 contacts →
	Partial evidence “Intecsa Industrial is a Spanish engineering company with more than 50 years experience in Engineering, “Turn-key” execution of industrial plants and supply of technological…” Source: RevenueBase Database · checked Sep 17, 2026
8	Lanco Infratech Limited	Indirect evidence	Madrid, SpainHQ checked Sep 17, 2026	1,001-5,000	314 contacts →
	Indirect evidence “LANCO INFRATECH LIMITED is an oil and energy company based out of Calle Laguna del Marquesado Nª 19, Nave 16 Edificio Adriana 1ª Planta, Polígono Industrial La Resina…” Source: RevenueBase Database · checked Sep 17, 2026
9	Df-Duro Felguera	Indirect evidence	Gijón, SpainHQ checked Sep 17, 2026	1,001-5,000	301 contacts →
	Indirect evidence “Duro Felguera is a global company based in Asturias.” Source: RevenueBase Database · checked Sep 17, 2026
10	Sólida	Indirect evidence	Madrid, SpainHQ checked Sep 17, 2026	201-500	298 contacts →
	Indirect evidence “SÓLIDA, a Bureau Veritas Company, is an independent company founded in 2007 that provides high added-value engineering and consulting services within the renewable energy sector.” Source: RevenueBase Database · checked Sep 17, 2026
11	AEE Power	Strong evidence	Madrid, SpainHQ checked Sep 17, 2026	201-500	231 contacts →
	Strong evidence “AEE Power is an EPC contractor and Power Developer specialized in the energy sector of Africa.” Source: RevenueBase Database · checked Sep 17, 2026
12	Iprocel	Indirect evidence	Las Palmas De Gran Canaria, SpainHQ checked Sep 17, 2026	51-200	216 contacts →
	Indirect evidence “IPROCEL es una empresa multinacional fundada en 1993 especializada en la prestación de servicios de ingeniería, puesta en marcha, operación y mantenimiento de sistemas eléctricos…” Source: RevenueBase Database · checked Sep 17, 2026
13	Initec Energía	Partial evidence	Madrid, SpainHQ checked Sep 17, 2026	201-500	168 contacts →
	Partial evidence “INITEC Energía focuses its activity on the construction of electricity generation facilities.” Source: RevenueBase Database · checked Sep 17, 2026
14	Vestel Ingenieros	Indirect evidence	Paterna, SpainHQ checked Sep 17, 2026	51-200	135 contacts →
	Indirect evidence “Vestel Ingenieros es una empresa con 20 años de experiencia que tiene el propósito de convertirse en la ingeniería eléctrica nº1 de España.” Source: RevenueBase Database · checked Sep 17, 2026
15	Azcatec Tecnología E Ingeniería	Partial evidence	Sevilla, SpainHQ checked Sep 17, 2026	51-200	98 contacts →
	Partial evidence “AZCATEC It is the tool for a group of well-organized professional engineers and experts in the development of industrial plants, energy and environmental engineering have to…” Source: RevenueBase Database · checked Sep 17, 2026
16	Diseprosa	Indirect evidence	Madrid, SpainHQ checked Sep 17, 2026	51-200	92 contacts →
	Indirect evidence “DISEÑOS Y PROYECTOS REUNIDOS, S.A.(DISEPROSA), fundada en Madrid en 1986 y dedicada al desarrollo y prestación de servicios de Ingeniería y Consultoría, Dirección y Supervisión de…” Source: RevenueBase Database · checked Sep 17, 2026
17	Dynatec, S.A	Strong evidence	Madrid, SpainHQ checked Sep 17, 2026	201-500	88 contacts →
	Strong evidence “Engineering company based in Madrid, Spain with over 40 years of experience in the fields of petrochemical and industrial engineering, conventional and nuclear power plants…” Source: RevenueBase Database · checked Sep 17, 2026
18	Ct3 Ingeniería	Indirect evidence	Majadahonda, SpainHQ checked Sep 17, 2026	51-200	75 contacts →
	Indirect evidence “The work of CT3 Ingeniería is aimed at ensuring utmost customer satisfaction through project engagement and commitment, while favouring the professional and personal development…” Source: RevenueBase Database · checked Sep 17, 2026
19	Enso Energy Environment & Sustainability	Indirect evidence	Madrid, SpainHQ checked Sep 17, 2026	51-200	72 contacts →
	Indirect evidence “ENSO Energy Environment and Sustainability se dedica al desarrollo, promoción, construcción y operación de plantas de generación eléctrica y térmica.” Source: RevenueBase Database · checked Sep 17, 2026
20	Seselec España	Indirect evidence	Madrid, SpainHQ checked Sep 17, 2026	51-200	61 contacts →
	Indirect evidence “SESELEC es una empresa EPC especializada en infraestructura eléctrica (Subestaciones, Líneas de Transmisión, Plantas Fotovoltaicas) dentro de México, Latinoamérica y España.” Source: RevenueBase Database · checked Sep 17, 2026
21	Grupo Cartago Ingenieros	Indirect evidence	Madrid, SpainHQ checked Sep 17, 2026	51-200	56 contacts →
	Indirect evidence “Grupo CARTAGO desarrolla servicios de ingeniería y de dirección y supervisión de obra en la construcción y puesta en marcha de plantas industriales, petroquímicas, centrales…” Source: RevenueBase Database · checked Sep 17, 2026
22	Syltec	Indirect evidence	Valladolid, SpainHQ checked Sep 17, 2026	51-200	47 contacts →
	Indirect evidence “SYLTEC es una empresa independiente, constituída con el objetivo de ofrecer servicios integrales de ingeniería, consultoría y formación a nivel nacional.” Source: RevenueBase Database · checked Sep 17, 2026
23	Indutec Instalaciones Y Energía	Indirect evidence	Zaragoza, SpainHQ checked Sep 17, 2026	51-200	23 contacts →
	Indirect evidence “INDUTEC INSTALACIONES Y ENERGÍA es la compañía perteneciente al grupo empresarial aragonés Grupo Marco, especializada en la construcción de proyectos llave en mano para el sector…” Source: RevenueBase Database · checked Sep 17, 2026
24	Grupo Gestacur	Indirect evidence	Albacete, SpainHQ checked Sep 17, 2026	51-200	22 contacts →
	Indirect evidence “Nuestra actividad central es la ejecución de obra civil en proyectos de producción de energía eléctrica, orientada a las Energías Renovables como Parques Eólicos, Plantas…” Source: RevenueBase Database · checked Sep 17, 2026
25	Ogisa Infraestructuras S.A	Indirect evidence	Zaragoza, SpainHQ checked Sep 17, 2026	51-200	22 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 17, 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: power plant construction 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 power plant construction contractors.
Partial evidence: Its own public description names part of power plant construction contractors, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name power plant construction 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 167 power plant construction contractors based in Spain

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Power plant construction contractors based in Spain at a glance

As of Sep 17, 2026

16.8%Verified-email coverage

114.1Average contacts per company

11-50Median size (employees)

16.8%Largest-city concentration · Madrid

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

10001+

Email recency for this list is measured worldwide rather than for Spain, so it is reported there. Company counts and contact totals on this page are exact for Spain, over 167 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 power plant construction 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.
What qualifies: Companies headquartered in Spain whose own description of what they do matches “power plant construction 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 power plant construction 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 power plant construction contractors, and records with no verified work email. Companies headquartered outside Spain 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, 3,203 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 17, 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.

Power plant construction contractors by metro

Power plant construction contractors in Madrid28

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 power plant construction 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 power plant construction contractors are there based in Spain?

RevenueBase identified 167 power plant construction contractors headquartered in Spain 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?

Tecnicas Reunidas, headquartered in Madrid, tops this list with the largest team on record.

Which city has the most power plant construction contractors?

Madrid leads with 28 headquartered companies, followed by Sevilla (9) and Barcelona (5).

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 3,203 verified decision-maker contacts tracked across these 167 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 17, 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.