Company lists · Data refreshed September 2026

Top 25 Oil and gas processing plant contractors based in Spain

Name: Oil and gas processing plant 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 116 companies tracked

RevenueBase identified 116 oil and gas processing plant contractors headquartered in Spain as of September 2026 and tracks 15,864 professional contacts across them, including 2,860 with verified work emails. Madrid is the largest hub.

This list covers oil and gas processing plant 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

116Companies

15,864Contacts tracked

2,860Verified emails

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The 25 largest oil and gas processing plant contractors based in Spain

Ranked by team size

Top 25 of 116 oil and gas processing plant 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 oil and gas processing plant 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	Nervion Industries, Engineering & Services, S.L	Indirect evidence	Bilbao, SpainHQ checked Sep 17, 2026	1,001-5,000	681 contacts →
	Indirect evidence “NERVION INDUSTRIES is a business group dedicated to industrial services and applied engineering, providing services in strategic sectors.” Source: RevenueBase Database · checked Sep 17, 2026
4	Grupo Masa	Indirect evidence	Madrid, SpainHQ checked Sep 17, 2026	1,001-5,000	450 contacts →
	Indirect evidence “MASA interviene en toda la cadena de actividades en la vida de las instalaciones e infraestructuras, desde su fase de proyecto, hasta la construcción y montaje de la instalación…” Source: RevenueBase Database · checked Sep 17, 2026
5	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
6	Técnicas Reunidas Initec	Indirect evidence	Madrid, SpainHQ checked Sep 17, 2026	501-1,000	276 contacts →
	Indirect evidence “Contratista general con actividad internacional que se dedica a la ingeniería, diseño y construcción de todo tipo de instalaciones industriales para un amplio espectro de clientes…” Source: RevenueBase Database · checked Sep 17, 2026
7	Teiga TMI	Indirect evidence	Bergondo, SpainHQ checked Sep 17, 2026	201-500	204 contacts →
	Indirect evidence “TEIGA TMI es una empresa con más de 40 años de experiencia, que ofrece soluciones y servicios de ingeniería; montaje y mantenimiento mecánico-eléctrico; con implantación en…” Source: RevenueBase Database · checked Sep 17, 2026
8	Lointek	Indirect evidence	Urduliz, SpainHQ checked Sep 17, 2026	201-500	140 contacts →
	Indirect evidence “LOINTEK is a private company firmly established in the international market of engineering, supply, manufacture and service in the sector of equipment for the industry of the…” Source: RevenueBase Database · checked Sep 17, 2026
9	Novargi	Partial evidence	Vitoria-gasteiz, SpainHQ checked Sep 17, 2026	51-200	123 contacts →
	Partial evidence “NOVARGI GROUP, is a global integral engineering solutions contractor for the Energy and Fertilizer Industry.” Source: RevenueBase Database · checked Sep 17, 2026
10	IDESA	Indirect evidence	Gijón, SpainHQ checked Sep 17, 2026	201-500	114 contacts →
	Indirect evidence “Founded in 1993, IDESA has grown to become one of the most currently recognized and respected companies in the design, fabrication and supply of static and modular equipment…” Source: RevenueBase Database · checked Sep 17, 2026
11	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
12	Ledr Ingenieria Y Servicios SL	Indirect evidence	Abrera, SpainHQ checked Sep 17, 2026	51-200	63 contacts →
	Indirect evidence “En LEDR Ingeniería y Servicios SL no solo diseñamos sobre el plano, nuestra verdadera fuerza reside en la capacidad de ejecutar proyectos desde el concepto inicial hasta la puesta…” Source: RevenueBase Database · checked Sep 17, 2026
13	Ineltron Solutions	Indirect evidence	Betanzos, SpainHQ checked Sep 17, 2026	201-500	58 contacts →
	Indirect evidence “INELTRON es una empresa multinacional especializada en la prestación de servicios de ingeniería, construcción, puesta en marcha, operación y mantenimiento en sistemas de…” Source: RevenueBase Database · checked Sep 17, 2026
14	Design And Projects International, C.A. Dapin	Strong evidence	San Sebastián De Los Reyes, SpainHQ checked Sep 17, 2026	201-500	58 contacts →
	Strong evidence “Design and Projects International, C.A.(DAPIN, C.A.), is a thriving engineering and construction company in the Oil & Gas / Energy industry positioned in natural gas, refining…” Source: RevenueBase Database · checked Sep 17, 2026
15	Iberastur Ingeniería	Indirect evidence	Avilés, SpainHQ checked Sep 17, 2026	51-200	48 contacts →
	Indirect evidence “Iberastur es una empresa especializada en ingeniería industrial, reconocida por ofrecer soluciones técnicas avanzadas para optimizar la eficiencia y el rendimiento de…” Source: RevenueBase Database · checked Sep 17, 2026
16	Opex Energy	Indirect evidence	Barcelona, SpainHQ checked Sep 17, 2026	11-50	44 contacts →
	Indirect evidence “Opex Energy is an engineering and technical assistance company.” Source: RevenueBase Database · checked Sep 17, 2026
17	Pipeworks, S.L	Indirect evidence	Tuy, SpainHQ checked Sep 17, 2026	51-200	41 contacts →
	Indirect evidence “PIPEWORKS - PIPELINES AND EQUIPMENT SOLUTIONS Tuberías • Centro de corte robotizado para tuberías.” Source: RevenueBase Database · checked Sep 17, 2026
18	CMN Ingeniería	Indirect evidence	Santa Cruz De Tenerife, SpainHQ checked Sep 17, 2026	11-50	30 contacts →
	Indirect evidence “We are a company of advanced technical services for Engineering, Construction and Installations.” Source: RevenueBase Database · checked Sep 17, 2026
19	OSL Iberia	Indirect evidence	Cartagena, SpainHQ checked Sep 17, 2026	51-200	27 contacts →
	Indirect evidence “OSL Iberia es una Ingeniería multidisciplinar con presencia internacional, formado por un equipo de profesionales creativos, que desarrolla e implementa soluciones de calidad y…” Source: RevenueBase Database · checked Sep 17, 2026
20	DYD Diseño Y Construcción Industrial S.L	Indirect evidence	Tres Cantos, SpainHQ checked Sep 17, 2026	51-200	27 contacts →
	Indirect evidence “DyD Diseño y Construcción Industrial S.L, es una empresa de ingeniería y construcción especializada en el desarrollo completo de proyectos de instalaciones industriales y obra…” Source: RevenueBase Database · checked Sep 17, 2026
21	Grupo Caldereria Rovira, S.L	Indirect evidence	Celrà, SpainHQ checked Sep 17, 2026	11-50	25 contacts →
	Indirect evidence “Caldereria Rovira is serving the industry worlwide since 1918.” Source: RevenueBase Database · checked Sep 17, 2026
22	Enemek	Strong evidence	San Roque, SpainHQ checked Sep 17, 2026	11-50	20 contacts →
	Strong evidence “Enemek is an EPC contractor specialised in utility-scale photovoltaic plants and Battery Energy Storage Systems (BESS).” Source: RevenueBase Database · checked Sep 17, 2026
23	Gilabert Miró S.A	Indirect evidence	Reus, SpainHQ checked Sep 17, 2026	51-200	19 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 17, 2026
24	Ibor Valves S.L	Indirect evidence	Castellar Del Valles, SpainHQ checked Sep 17, 2026	51-200	18 contacts →
	Indirect evidence “IBOR VALVES is a reliable company committed to providing highest quality valves to their partners.” Source: RevenueBase Database · checked Sep 17, 2026
25	Kiseki SL	Indirect evidence	Rubi, SpainHQ checked Sep 17, 2026	51-200	11 contacts →
	Indirect evidence “Empresa de Ingeniería Aplicada.” 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: oil and gas processing plant 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 oil and gas processing plant contractors.
Partial evidence: Its own public description names part of oil and gas processing plant contractors, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name oil and gas processing plant 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 116 oil and gas processing plant contractors based in Spain

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Oil and gas processing plant contractors based in Spain at a glance

As of Sep 17, 2026

18.0%Verified-email coverage

136.8Average contacts per company

11-50Median size (employees)

17.2%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 116 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 oil and gas processing plant 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 “oil and gas processing plant 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 oil and gas processing plant 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 oil and gas processing plant 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, 2,860 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.

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 oil and gas processing plant 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 oil and gas processing plant contractors are there based in Spain?

RevenueBase identified 116 oil and gas processing plant 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 oil and gas processing plant contractors?

Madrid leads with 20 headquartered companies, followed by Gijon (4) and Alcobendas (3).

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 2,860 verified decision-maker contacts tracked across these 116 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.