Company lists · Data refreshed September 2026

Top 20 Refinery engineering firms based in Madrid, Spain

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

Compiled by the RevenueBase Data Team Data refreshed Sep 17, 2026 118 companies tracked

RevenueBase identified 118 refinery engineering firms headquartered in Madrid, Spain as of September 2026 and tracks 13,300 professional contacts across them, including 2,605 with verified work emails. Madrid is the largest hub.

This list covers refinery engineering firms headquartered in Madrid, 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

118Companies

13,300Contacts tracked

2,605Verified emails

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The 20 largest refinery engineering firms based in Madrid, Spain

Ranked by team size

Top 20 of 118 refinery engineering firms based in Madrid, 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	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
3	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
4	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
5	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
6	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
7	Dynatec, S.A	Partial evidence	Madrid, SpainHQ checked Sep 17, 2026	201-500	88 contacts →
	Partial 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
8	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
9	Axiom Ingeniería	Indirect evidence	Madrid, SpainHQ checked Sep 17, 2026	51-200	51 contacts →
	Indirect evidence “AXIOM ha sido constituida como consecuencia de la unión de un grupo de técnicos cualificados, provenientes de diferentes empresas de servicios, con especializaciones en…” Source: RevenueBase Database · checked Sep 17, 2026
10	Aguilera Ingenieros S.A	Indirect evidence	Madrid, SpainHQ checked Sep 17, 2026	11-50	24 contacts →
	Indirect evidence “AGUILERA INGENIEROS es una empresa de ingeniería de proyectos complejos y de gran especialización con más de 50 años de experiencia.” Source: RevenueBase Database · checked Sep 17, 2026
11	Orfisa IKC	Partial evidence	Madrid, SpainHQ checked Sep 17, 2026	11-50	18 contacts →
	Partial evidence “INDEPENDENT CONSULTING ENGINEERING - CONSULTING & ADVICE ON INTERNATIONAL TENDERS - PROJECT & CONSTRUCTION MANAGEMENT ORFISA is a independent consulting engineering.” Source: RevenueBase Database · checked Sep 17, 2026
12	Arditecnica S.L.U	Indirect evidence	Madrid, SpainHQ checked Sep 17, 2026	11-50	13 contacts →
	Indirect evidence “ARDITECNICA is a company established in as part of the German group Bayerische Hausbau, created for the planning and control of the execution of the projects that the group…” Source: RevenueBase Database · checked Sep 17, 2026
13	Dpta Piping	Indirect evidence	Madrid, SpainHQ checked Sep 17, 2026	11-50	10 contacts →
	Indirect evidence “Ofrecemos apoyo y asistencia a las oficinas técnicas de ingeniería en las disciplinas mecánicas, civil y electricidad e I&C.” Source: RevenueBase Database · checked Sep 17, 2026
14	Profit Innova	Indirect evidence	Madrid, SpainHQ checked Sep 17, 2026	11-50	7 contacts →
	Indirect evidence “Somos una empresa de Ingeniería internacional especializada en equipos, instalaciones y procesos industriales.” Source: RevenueBase Database · checked Sep 17, 2026
15	Grupo CIM	Indirect evidence	Madrid, SpainHQ checked Sep 17, 2026	1-10	7 contacts →
	Indirect evidence “Grupo Cim es una empresa con más 20 años de experiencia como Consultoría integral y multidisciplinar de Ingeniería y Project Management, consolidados en mercado como especialistas…” Source: RevenueBase Database · checked Sep 17, 2026
16	Inypsa Infrastructures	Indirect evidence	Madrid, SpainHQ checked Sep 17, 2026	51-200	6 contacts →
	Indirect evidence “Founded in 1970 and with a team of over 180 professionals, INYPSA is constantly searching for and implementing best practices to provide infrastructures and public services in the…” Source: RevenueBase Database · checked Sep 17, 2026
17	Agnua Ingeniería	Indirect evidence	Madrid, SpainHQ checked Sep 17, 2026	1-10	6 contacts →
	Indirect evidence “Somos una empresa de ingeniería y consultoría dedicada al diseño de plantas de tratamiento de agua.” Source: RevenueBase Database · checked Sep 17, 2026
18	LGM Ingenieros	Indirect evidence	Madrid, SpainHQ checked Sep 17, 2026	1-10	6 contacts →
	Indirect evidence “LGM Ingenieros, que forma parte del grupo LGM, es una empresa de consultoría de ingeniería tecnológica con más de 30 años de experiencia y con una gran presencia internacional.” Source: RevenueBase Database · checked Sep 17, 2026
19	Equilivra Ingenieros	Indirect evidence	Madrid, SpainHQ checked Sep 17, 2026	1-10	5 contacts →
	Indirect evidence “Equilivra Ingenieros es una consultora de ingeniería especializada en los campos del diseño, control, puesta en marcha y validación de instalaciones y en el asesoramiento en la…” Source: RevenueBase Database · checked Sep 17, 2026
20	Indaos Ingenieros SL	Indirect evidence	Madrid, SpainHQ checked Sep 17, 2026	1-10	1 contacts →
	Indirect evidence “INDAOS is a E.U.” 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 20 of 118 refinery engineering firms based in Madrid, Spain

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Refinery engineering firms based in Madrid, Spain at a glance

As of Sep 17, 2026

19.6%Verified-email coverage

112.7Average contacts per company

11-50Median size (employees)

100.0%Largest-city concentration · Madrid

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

10001+

Email recency for this list is measured across the whole Spain list rather than for Madrid, so it is reported there. Company counts and contact totals on this page are exact for Madrid, over 118 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 Madrid, 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 Madrid 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, 2,605 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 in Spain

Refinery engineering firms in Madrid118
Refinery engineering firms in Barcelona57
Refinery engineering firms in Valencia36
Refinery engineering firms in Sevilla30

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 Madrid, Spain?

RevenueBase identified 118 refinery engineering firms headquartered in Madrid, 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 2,605 verified decision-maker contacts tracked across these 118 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.