Company lists · Data refreshed September 2026

Top 25 Refinery engineering firms based in Spain

Name: Refinery engineering firms based in Spain
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 17, 2026 883 companies tracked

RevenueBase identified 883 refinery engineering firms headquartered in Spain as of September 2026 and tracks 23,763 professional contacts across them, including 3,490 with verified work emails. Madrid is the largest hub.

This list covers refinery engineering firms 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

883Companies

23,763Contacts tracked

3,490Verified emails

Explore this list → Free signup · no credit card · 500 free credits

The 25 largest refinery engineering firms based in Spain

Ranked by team size

Top 25 of 883 refinery engineering firms 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 refinery engineering 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	Tecnicas Reunidas	Partial evidence	Madrid, SpainHQ checked Sep 17, 2026	10001+	10,588 contacts →
	Partial 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	Inerco	Indirect evidence	Sevilla, SpainHQ checked Sep 17, 2026	1,001-5,000	688 contacts →
	Indirect evidence “INERCO, with 30 years of experience, offers comprehensive services and develops advanced technologies that contribute to sustainable industrial development, acting as a leader in…” Source: RevenueBase Database · checked Sep 17, 2026
4	Tamoin	Indirect evidence	Erandio/ Altzaga, SpainHQ checked Sep 17, 2026	1,001-5,000	630 contacts →
	Indirect evidence “TAMOIN, fundada en 1956, es en la actualidad una sociedad empresarial de GTM Grupo, en constante evolución hacia la especialización en servicios industriales.” 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	Iplan Gestión Integral	Partial evidence	Barcelona, SpainHQ checked Sep 17, 2026	501-1,000	363 contacts →
	Partial evidence “Iplan is a company related to the engineering services of projects developed mainly in the energy sector, civil works, renewable energies and environment.” Source: RevenueBase Database · checked Sep 17, 2026
7	JG Ingenieros S.A	Indirect evidence	Barcelona, SpainHQ checked Sep 17, 2026	51-200	346 contacts →
	Indirect evidence “JG Ingenieros, S.A.” Source: RevenueBase Database · checked Sep 17, 2026
8	Esteyco	Indirect evidence	Madrid, SpainHQ checked Sep 17, 2026	201-500	268 contacts →
	Indirect evidence “Desde 1970 ESTEYCO ha desarrollado internacionalmente más de 1.300 estudios y proyectos.” Source: RevenueBase Database · checked Sep 17, 2026
9	Ingeniería Estudios Y Proyectos Nip,s.A. Nipsa	Partial evidence	Madrid, SpainHQ checked Sep 17, 2026	201-500	236 contacts →
	Partial evidence “Ingeniería Estudios y Proyectos NIP, S.A.(NIPSA) is a Spanish engineering and consulting company created in 1976 with the purpose of providing high quality and flexible technical…” Source: RevenueBase Database · checked Sep 17, 2026
10	Ecointegral Ingeniería, SL	Partial evidence	Córdoba, SpainHQ checked Sep 17, 2026	201-500	234 contacts →
	Partial evidence “ECOINTEGRAL INGENIERÍA is an independent company of advanced engineering and consulting firm that operates in 3 areas of expertise: Energy, Telecommunications and Environment.” Source: RevenueBase Database · checked Sep 17, 2026
11	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
12	Lointek	Partial evidence	Urduliz, SpainHQ checked Sep 17, 2026	201-500	140 contacts →
	Partial 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
13	Nadico	Indirect evidence	Parets Del Vallès, SpainHQ checked Sep 17, 2026	51-200	138 contacts →
	Indirect evidence “Nadico es una empresa especializada en la prestación de servicios técnicos de ingeniería, arquitectura y consultoría industrial.” 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	Instra Ingenieros	Indirect evidence	A Coruña, SpainHQ checked Sep 17, 2026	51-200	135 contacts →
	Indirect evidence “Instra Ingenieros, empresa de ingeniería y consultoría, aporta creatividad e innovación en sus servicios para el desarrollo industrial y empresarial.” Source: RevenueBase Database · checked Sep 17, 2026
16	Voltae Engineering	Indirect evidence	Sevilla, SpainHQ checked Sep 17, 2026	51-200	132 contacts →
	Indirect evidence “Somos una compañía de ingeniería y consultoría altamente especializada, ofreciendo servicios integrales de alto valor en proyectos de transmisión, distribución y generación de…” Source: RevenueBase Database · checked Sep 17, 2026
17	Techno PRO Hispania	Partial evidence	Cartagena, SpainHQ checked Sep 17, 2026	201-500	128 contacts →
	Partial evidence “Since 1990, Techno Pro Hispania (TPH) and the FIVA Group have worked closely with their clients in the development of industrial, naval, energy, and petrochemical engineering…” Source: RevenueBase Database · checked Sep 17, 2026
18	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
19	Eia21	Partial evidence	Erandio, SpainHQ checked Sep 17, 2026	51-200	113 contacts →
	Partial evidence “Founded in 1979, EIA21 was chartered with the aim of responding to the engineering needs of high growth industrial companies, soon achieved a strong footprint in this area…” Source: RevenueBase Database · checked Sep 17, 2026
20	Heymo Ingeniería, S.A.U	Indirect evidence	Madrid, SpainHQ checked Sep 17, 2026	201-500	109 contacts →
	Indirect evidence “HEYMO es una empresa de servicios profesionales de ingeniería y consultoría que cuenta con 60 años de experiencia nacional e internacional.” Source: RevenueBase Database · checked Sep 17, 2026
21	Iturcemi Grupo	Indirect evidence	Avilés, SpainHQ checked Sep 17, 2026	51-200	100 contacts →
	Indirect evidence “Iturcemi ingeniería con más de 25 años de experiencia, siendo un referente en el sector en el Norte de España.” Source: RevenueBase Database · checked Sep 17, 2026
22	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
23	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
24	Emurtel	Indirect evidence	El Palmar (murcia), SpainHQ checked Sep 17, 2026	51-200	92 contacts →
	Indirect evidence “Emurtel es una compañía líder de ingeniería y consultoría multidisciplinar orientada a la gestión integral de proyectos, ofreciendo soluciones de valor añadido en el diseño…” Source: RevenueBase Database · checked Sep 17, 2026
25	EACOM	Indirect evidence	Barcelona, SpainHQ checked Sep 17, 2026	51-200	90 contacts →
	Indirect evidence “EACOM S.A.(Enginyers i Arquitectes, Consultors d'Obres i Muntatges S.A.) es una sociedad privada consultora de servicios y actividades de ingeniería, que nace con las obras…” 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: refinery engineering 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 refinery engineering firms.
Partial evidence: Its own public description names part of refinery engineering firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name refinery engineering 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 883 refinery engineering firms based in Spain

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 3,490 reachable decision-makers.

Free signup · no credit card

View the full list →

Refinery engineering firms based in Spain at a glance

As of Sep 17, 2026

14.7%Verified-email coverage

26.9Average contacts per company

1-10Median size (employees)

13.4%Largest-city concentration · Madrid

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

519

11-50

253

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 883 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 refinery engineering 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 Spain whose own description of what they do matches “refinery engineering 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 refinery engineering 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 refinery engineering firms, 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, 3,490 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.

Refinery engineering firms by metro

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 refinery engineering 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 refinery engineering firms are there based in Spain?

RevenueBase identified 883 refinery engineering firms 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 refinery engineering firms?

Madrid leads with 118 headquartered companies, followed by Barcelona (57) and Valencia (36).

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 3,490 verified decision-maker contacts tracked across these 883 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.

Ready to reach these companies? Verified emails and direct dials for all 883 refinery engineering firms based in Spain. Start with a free account, no credit card.

Download this list →

Related lists

Refinery engineering firms by geography

Browse the directory

Browse: Companies home · All Spain lists · All Refinery engineering firms lists · New lists

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.