Company lists · Data refreshed September 2026

Top 25 Marine environmental engineering companies based in France

Name: Marine environmental 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 418 companies tracked

RevenueBase identified 418 marine environmental engineering companies headquartered in France as of September 2026 and tracks 10,940 professional contacts across them, including 3,559 with verified work emails. Paris is the largest hub.

This list covers marine environmental 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

418Companies

10,940Contacts tracked

3,559Verified emails

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The 25 largest marine environmental engineering companies based in France

Ranked by team size

Top 25 of 418 marine environmental 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 marine environmental 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	Chantiers DE L'atlantique	Partial evidence	Saint-nazaire, FranceHQ checked Sep 17, 2026	1,001-5,000	2,004 contacts →
	Partial 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
2	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
3	Groupe Géotec	Indirect evidence	Quetigny, FranceHQ checked Sep 17, 2026	501-1,000	441 contacts →
	Indirect evidence “Groupe Géotec, bureau d’études en ingénierie géotechnique et environnementale, créé en 1973, conseille l’ensemble des interlocuteurs de l’acte de construire : maîtres d’ouvrage…” Source: RevenueBase Database · checked Sep 17, 2026
4	Brézillon	Indirect evidence	Margny-lès-compiègne, FranceHQ checked Sep 17, 2026	51-200	286 contacts →
	Indirect evidence “Entreprise spécialisée en génie environnemental, Brézillon agit depuis près de 30 ans pour préserver, restaurer et valoriser les terrains sur l’ensemble du territoire national.” Source: RevenueBase Database · checked Sep 17, 2026
5	IRH Ingenieur Conseil	Indirect evidence	Ludres, FranceHQ checked Sep 17, 2026	51-200	229 contacts →
	Indirect evidence “IRH Ingénieur Conseil est membre d'Antea Group.” Source: RevenueBase Database · checked Sep 17, 2026
6	Geocean	Partial evidence	Cassis, FranceHQ checked Sep 17, 2026	n/a	216 contacts →
	Partial 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
7	LAB	Partial evidence	Lyon, FranceHQ checked Sep 17, 2026	51-200	210 contacts →
	Partial evidence “LAB is a globally engineering, construction and services entity, providing to its customers turnkey solutions to reduce all kinds of emissions to Air.” Source: RevenueBase Database · checked Sep 17, 2026
8	Aventa	Partial evidence	Paris, FranceHQ checked Sep 17, 2026	201-500	176 contacts →
	Partial evidence “Aventa empowers the Marine Energy market with the sharpest skills to help design a bluer future.” Source: RevenueBase Database · checked Sep 17, 2026
9	Écosphère	Strong evidence	St.-maurice, FranceHQ checked Sep 17, 2026	201-500	174 contacts →
	Strong evidence “For over 35 years, Écosphère has been providing consulting and engineering services in the environmental field.” Source: RevenueBase Database · checked Sep 17, 2026
10	Hydrokarst	Indirect evidence	Sassenage, FranceHQ checked Sep 17, 2026	201-500	170 contacts →
	Indirect evidence “HYDROKARST joins JARNIAS GROUP!” Source: RevenueBase Database · checked Sep 17, 2026
11	Setec Énergie Environnement	Partial evidence	Paris, FranceHQ checked Sep 17, 2026	51-200	143 contacts →
	Partial evidence “Setec énergie environnement is a subsidiary of the setec group, one of France’s leading engineering firms (3 300 employees).” Source: RevenueBase Database · checked Sep 17, 2026
12	Artifex	Indirect evidence	Albi, FranceHQ checked Sep 17, 2026	51-200	123 contacts →
	Indirect evidence “ARTIFEX, une société de SOCOTEC est un bureau d’ingénierie et de conseil en environnement, créé en janvier 1983 et basé à Albi dans le Tarn.” Source: RevenueBase Database · checked Sep 17, 2026
13	TSM	Partial evidence	Rouen, FranceHQ checked Sep 17, 2026	201-500	109 contacts →
	Partial evidence “TSM owns and operates 30 vessels and offers marine services to the offshore renewables industry, harbour and sea towage.” Source: RevenueBase Database · checked Sep 17, 2026
14	OTIMO	Indirect evidence	Boulogne-billancourt, FranceHQ checked Sep 17, 2026	51-200	106 contacts →
	Indirect evidence “otimo est une société de conseil en ingénierie spécialisée dans les secteurs de l'Énergie, l'Environnement et les Infrastructures.” Source: RevenueBase Database · checked Sep 17, 2026
15	Creocean	Indirect evidence	La Rochelle, FranceHQ checked Sep 17, 2026	51-200	90 contacts →
	Indirect evidence “Notre expertise au service des océans et des littoraux : Notre bureau d'études accompagne les projets sur l’ensemble du littoral français et à l’international, avec une expertise…” Source: RevenueBase Database · checked Sep 17, 2026
16	NCA Environnement	Indirect evidence	Neuville-de-poitou, FranceHQ checked Sep 17, 2026	51-200	80 contacts →
	Indirect evidence “Bureau d’étude créé en 1988 et dirigé par Aymeric Minot, nous sommes 70 ingénieurs et techniciens aux profils variés spécialisés en environnement.” Source: RevenueBase Database · checked Sep 17, 2026
17	TEREA	Partial evidence	Marseille, FranceHQ checked Sep 17, 2026	11-50	73 contacts →
	Partial evidence “TEREA is a professional environmental consulting company specialized in environment and sustainable management of natural resources.” Source: RevenueBase Database · checked Sep 17, 2026
18	Envisol	Indirect evidence	La Tour Du Pin, FranceHQ checked Sep 17, 2026	51-200	70 contacts →
	Indirect evidence “ENVISOL est une entreprise spécialisée dans le conseil et l’ingénierie offrant des prestations dans le domaine des sites et sols pollués.” Source: RevenueBase Database · checked Sep 17, 2026
19	Ségic Ingénierie	Indirect evidence	Verrières-le-buisson, FranceHQ checked Sep 17, 2026	51-200	65 contacts →
	Indirect evidence “SÉGIC Ingénierie est un acteur fort du Conseil dans les domaines de l’Environnement et des Infrastructures.” Source: RevenueBase Database · checked Sep 17, 2026
20	Altifaune	Indirect evidence	Pézenas, FranceHQ checked Sep 17, 2026	11-50	62 contacts →
	Indirect evidence “Spécialisé dans l’expertise de la faune, de la flore et des milieux naturels, le bureau d’études ALTIFAUNE a développé une expérience technique et scientifique au service de…” Source: RevenueBase Database · checked Sep 17, 2026
21	Igrec Ingenierie	Indirect evidence	Paris, FranceHQ checked Sep 17, 2026	51-200	61 contacts →
	Indirect evidence “Fondée en 1958, IGREC INGENIERIE, assure des missions d’ingénierie générale et de conseil dans les domaines les plus variés du bâtiment, de l’industrie, des infrastructures, des…” Source: RevenueBase Database · checked Sep 17, 2026
22	Prolog Ingenierie	Strong evidence	Paris, FranceHQ checked Sep 17, 2026	51-200	56 contacts →
	Strong evidence “PROLOG INGENIERIE is a consulting engineering firm at the forefront of water management and remote-controlled systems, committed to enhancing water quality and environmental…” Source: RevenueBase Database · checked Sep 17, 2026
23	Aquascop Sarl	Indirect evidence	Beaucouzé, FranceHQ checked Sep 17, 2026	51-200	53 contacts →
	Indirect evidence “Aquascop est un bureau d´études indépendant spécialisé dans l´étude des milieux aquatiques, implantés sur 5 agences en France métropolitaine (Angers, Montpellier, Toulouse, Nancy…” Source: RevenueBase Database · checked Sep 17, 2026
24	Groupe Merceron	Partial evidence	Sallertaine, FranceHQ checked Sep 17, 2026	51-200	51 contacts →
	Partial evidence “Le Groupe Merceron est un acteur majeur de la Vendée, fort de près de 70 ans d'expérience dans les travaux maritimes, fluviaux, environnementaux et l'exploitation de carrières.” Source: RevenueBase Database · checked Sep 17, 2026
25	D-Ice Engineering	Indirect evidence	Nantes, FranceHQ checked Sep 17, 2026	11-50	49 contacts →
	Indirect evidence “We are a deeptech company based in France.” 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: marine environmental 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 marine environmental engineering companies.
Partial evidence: Its own public description names part of marine environmental engineering companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name marine environmental 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 418 marine environmental engineering companies based in France

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Marine environmental engineering companies based in France at a glance

As of Sep 17, 2026

32.5%Verified-email coverage

26.2Average contacts per company

1-10Median size (employees)

5.3%Largest-city concentration · Paris

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

247

11-50

121

51-200

201-500

501-1,000

1,001-5,000

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 418 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 marine environmental 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 “marine environmental 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 marine environmental 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 marine environmental 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, 3,559 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 marine environmental 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 marine environmental engineering companies are there based in France?

RevenueBase identified 418 marine environmental 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?

Chantiers DE L'atlantique, headquartered in Saint-Nazaire, tops this list with the largest team on record.

Which city has the most marine environmental engineering companies?

Paris leads with 22 headquartered companies, followed by Marseille (14) and Bordeaux (9).

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 3,559 verified decision-maker contacts tracked across these 418 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.