Company lists · Data refreshed September 2026

Top 25 Offshore engineering companies based in France

Name: Offshore engineering companies based in France
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 17, 2026 208 companies tracked

RevenueBase identified 208 offshore engineering companies headquartered in France as of September 2026 and tracks 27,197 professional contacts across them, including 5,649 with verified work emails. Paris is the largest hub.

This list covers offshore engineering companies headquartered in France, 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

208Companies

27,197Contacts tracked

5,649Verified emails

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The 25 largest offshore engineering companies based in France

Ranked by team size

Top 25 of 208 offshore engineering companies based in France, ranked by team size, largest first. Data refreshed Sep 17, 2026. RevenueBase Smart Search rates how each company's information relates to offshore engineering companies: 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	Ortec Group	Indirect evidence	Aix-en-provence, FranceHQ checked Sep 17, 2026	10001+	3,436 contacts →
	Indirect evidence “En conjuguant depuis sa création audace et rigueur, le groupe Ortec est devenu aujourd’hui un des leaders des services à l’industrie, l’énergie et l’environnement.” Source: RevenueBase Database · checked Sep 17, 2026
2	Altrad	Indirect evidence	Montpellier, FranceHQ checked Sep 17, 2026	10001+	3,056 contacts →
	Indirect evidence “ALTRAD AT A GLANCE Altrad is a world leader in the provision of industrial services, generating high-added value solutions principally for the Energy, Power Generation, Oil & Gas…” Source: RevenueBase Database · checked Sep 17, 2026
3	Chantiers DE L'atlantique	Indirect evidence	Saint-nazaire, FranceHQ checked Sep 17, 2026	1,001-5,000	2,004 contacts →
	Indirect evidence “Installée sur la façade Atlantique, Chantiers de l’Atlantique est une entreprise de construction maritime (paquebots, sous-stations…) et de services aux flottes.” Source: RevenueBase Database · checked Sep 17, 2026
4	Groupe Ponticelli Frères	Indirect evidence	FranceHQ checked Sep 17, 2026	5,001-10,000	1,829 contacts →
	Indirect evidence “The Ponticelli Frères Group is one of the main European service suppliers to companies in the energy (oil and gas, nuclear, renewable energy), industrial (chemical, steelworks…” Source: RevenueBase Database · checked Sep 17, 2026
5	EKIUM	Indirect evidence	Lyon Cedex 07, FranceHQ checked Sep 17, 2026	1,001-5,000	1,502 contacts →
	Indirect evidence “Welcome to Ekium!” Source: RevenueBase Database · checked Sep 17, 2026
6	Parlym	Partial evidence	Estaque, FranceHQ checked Sep 17, 2026	1,001-5,000	732 contacts →
	Partial evidence “For over 50 years the Parlym Group has managed to establish itself as a major player in industrial engineering all over the world.” Source: RevenueBase Database · checked Sep 17, 2026
7	Foure Lagadec	Indirect evidence	Le Havre, FranceHQ checked Sep 17, 2026	1,001-5,000	718 contacts →
	Indirect evidence “Building on its industrial heritage, its strong ties to the Snef Group, and its commitment to innovation, Fouré Lagadec continues to evolve to meet the technical and energy…” Source: RevenueBase Database · checked Sep 17, 2026
8	3c Metal	Partial evidence	Sauvelade, FranceHQ checked Sep 17, 2026	1,001-5,000	518 contacts →
	Partial evidence “Established in 1995 in France, 3C Metal Group is a recognized leader in providing sophisticated engineering services to the oil and gas, green technology, renewable energy, power…” Source: RevenueBase Database · checked Sep 17, 2026
9	Neo2	Partial evidence	Levallois-perret, FranceHQ checked Sep 17, 2026	501-1,000	390 contacts →
	Partial evidence “NEO2 is an Engineering Consultancy and Resource Provider active in the Oil & Gas, Water Treatment & Desalination, and Power Generation industries.” Source: RevenueBase Database · checked Sep 17, 2026
10	Doris Group	Partial evidence	Paris, FranceHQ checked Sep 17, 2026	501-1,000	365 contacts →
	Partial evidence “DORIS is a leader in the provision of engineering, advisory, and project management services to the energy industry.” Source: RevenueBase Database · checked Sep 17, 2026
11	Atlantic Ingénierie	Indirect evidence	Saint-herblain, FranceHQ checked Sep 17, 2026	201-500	341 contacts →
	Indirect evidence “Atlantic Ingénierie, l’énergie d’avancer ensemble Chez Atlantic Ingénierie, nous avons une conviction : les projets d’énergie et d’industrie avancent mieux quand on allie…” Source: RevenueBase Database · checked Sep 17, 2026
12	Alpha Maintenance	Indirect evidence	Rouen, FranceHQ checked Sep 17, 2026	201-500	265 contacts →
	Indirect evidence “Alpha Maintenance is an oil and energy company based out of Avenue Auguste Marius Peyre, Port-de-Bouc, France.” Source: RevenueBase Database · checked Sep 17, 2026
13	Entrepose Group	Indirect evidence	Colombes, FranceHQ checked Sep 17, 2026	1,001-5,000	240 contacts →
	Indirect evidence “SPECIALISED ACTIVITIES & EPC CONTRACTOR FOR THE ENERGY INDUSTRY International Contractor for design, construction and operating of production, transport and storage…” Source: RevenueBase Database · checked Sep 17, 2026
14	Gestal	Indirect evidence	Saint-Andre-Des-Eaux, FranceHQ checked Sep 17, 2026	501-1,000	220 contacts →
	Indirect evidence “Gestal est un acteur majeur des services à l’industrie depuis près de 80 ans.” Source: RevenueBase Database · checked Sep 17, 2026
15	Geocean	Indirect evidence	Cassis, FranceHQ checked Sep 17, 2026	n/a	216 contacts →
	Indirect evidence “GEOCEAN is a marine work contractor, based near Marseille, in the south of France, with 30 years experience worldwide.” Source: RevenueBase Database · checked Sep 17, 2026
16	Arkadia Group	Indirect evidence	Aix-en-provence, FranceHQ checked Sep 17, 2026	201-500	215 contacts →
	Indirect evidence “Créée en 2010, ARKADIA Group est une société d’ingénierie et de services indépendante à taille humaine d’environ 300 personnes dédiée aux filières Énergétique, et…” Source: RevenueBase Database · checked Sep 17, 2026
17	Aventa	Indirect evidence	Paris, FranceHQ checked Sep 17, 2026	201-500	176 contacts →
	Indirect evidence “Aventa empowers the Marine Energy market with the sharpest skills to help design a bluer future.” Source: RevenueBase Database · checked Sep 17, 2026
18	Bouygues Energies & Services, Industry	Indirect evidence	Guyancourt, FranceHQ checked Sep 17, 2026	1,001-5,000	154 contacts →
	Indirect evidence “Bouygues Energies & Services, Energy and Industry, a subsidiary of Equans, is a specialist design, build, and maintain partner for the industries of today and tomorrow.” Source: RevenueBase Database · checked Sep 17, 2026
19	Axodyn	Indirect evidence	Limonest, FranceHQ checked Sep 17, 2026	51-200	153 contacts →
	Indirect evidence “AXODYN – L’ingénierie des projets complexes Créée en 2013, AXODYN accompagne les grands acteurs de l’Énergie, de l’Industrie et des Infrastructures sur des projets techniques à…” Source: RevenueBase Database · checked Sep 17, 2026
20	ITP Interpipe	Indirect evidence	Louveciennes, FranceHQ checked Sep 17, 2026	51-200	110 contacts →
	Indirect evidence “Since 1992 ITP Interpipe, based in Paris and Houston, has specialized in the design, provision and fabrication of highly insulated pipelines.” Source: RevenueBase Database · checked Sep 17, 2026
21	IES	Indirect evidence	Notre Dame De Gravenchon, FranceHQ checked Sep 17, 2026	51-200	110 contacts →
	Indirect evidence “L’ingénierie à taille humaine sur l’Axe Seine Le Havre-Rouen Implantés à Port-Jérôme-sur-Seine et Grand Couronne, nous accompagnons les acteurs des secteurs stratégiques …” Source: RevenueBase Database · checked Sep 17, 2026
22	Stat Marine	Partial evidence	Nîmes, FranceHQ checked Sep 17, 2026	51-200	81 contacts →
	Partial evidence “Created in 1983, STAT MARINE is an entrepreneurial and client-focused organisation; it has won its reputation not only for its practical approach to operational and engineering…” Source: RevenueBase Database · checked Sep 17, 2026
23	Dolfines	Partial evidence	Montigny Le Bretonneux, FranceHQ checked Sep 17, 2026	51-200	73 contacts →
	Partial evidence “Dolfines is an independent engineering and services specialist assisting industrial clients across the energy value chain in achieving operational excellence.” Source: RevenueBase Database · checked Sep 17, 2026
24	TVA Engineering	Partial evidence	Antony, FranceHQ checked Sep 17, 2026	51-200	73 contacts →
	Partial evidence “Since 1988, TVA Engineering member of TVA Group has carried its expertise into industrial applications of numerous sectors that are equally demanding in technical expertise…” Source: RevenueBase Database · checked Sep 17, 2026
25	Groupe Inatis	Indirect evidence	Villeneuve-d’ascq, FranceHQ checked Sep 17, 2026	51-200	69 contacts →
	Indirect evidence “Postuler à nos offres d'emploi : Envoyer votre CV : Le Groupe Inatis, Ingénierie et Conseil en technologies, est spécialisé dans l’assistance technique aux grands donneurs…” 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: offshore engineering companies. 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 offshore engineering companies.
Partial evidence: Its own public description names part of offshore engineering companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name offshore engineering companies. 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 208 offshore engineering companies based in France

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Offshore engineering companies based in France at a glance

As of Sep 17, 2026

20.8%Verified-email coverage

130.8Average contacts per company

11-50Median size (employees)

6.7%Largest-city concentration · Paris

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency for this list is measured worldwide rather than for France, so it is reported there. Company counts and contact totals on this page are exact for France, over 208 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 offshore engineering companies, 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 France whose own description of what they do matches “offshore engineering companies”. 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 offshore engineering companies), 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 offshore engineering companies, and records with no verified work email. Companies headquartered outside France 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, 5,649 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 offshore engineering companies, 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 offshore engineering companies are there based in France?

RevenueBase identified 208 offshore engineering companies headquartered in France 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?

Ortec Group, headquartered in Aix-En-Provence, tops this list with the largest team on record.

Which city has the most offshore engineering companies?

Paris leads with 14 headquartered companies, followed by Marseille (5) and Aix-En-Provence (4).

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 5,649 verified decision-maker contacts tracked across these 208 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.