Company lists · Data refreshed September 2026

Top 25 Offshore environmental consulting based in France

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

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 498 companies tracked

RevenueBase identified 498 offshore environmental consulting headquartered in France as of September 2026 and tracks 11,989 professional contacts across them, including 4,006 with verified work emails. Paris is the largest hub.

This list covers offshore environmental consulting 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 20, 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 20, 2026 86% judged on-target in blind review

498Companies

11,989Contacts tracked

4,006Verified emails

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The 25 largest offshore environmental consulting based in France

Ranked by team size

Top 25 of 498 offshore environmental consulting based in France, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to offshore environmental consulting: 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 20, 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 20, 2026
2	Vulcain Engineering Group	Partial evidence	Neuilly-sur-seine, FranceHQ checked Sep 20, 2026	5,001-10,000	1,496 contacts →
	Partial evidence “Vulcain Engineering Group is a multi-specialist engineering and consulting group serving industrial companies across the globe, focused on critical sectors: energy, health…” Source: RevenueBase Database · checked Sep 20, 2026
3	Biotope	Indirect evidence	Mèze, FranceHQ checked Sep 20, 2026	201-500	517 contacts →
	Indirect evidence “Fondée en 1993 par des passionnés de nature engagés, Biotope s’est imposée au fil des années comme précurseur et leader mondial de l’ingénierie environnementale et de la…” Source: RevenueBase Database · checked Sep 20, 2026
4	Groupe Géotec	Indirect evidence	Quetigny, FranceHQ checked Sep 20, 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 20, 2026
5	Eodd Ingénieurs Conseils	Indirect evidence	Villeurbanne, FranceHQ checked Sep 20, 2026	201-500	278 contacts →
	Indirect evidence “Créé en 1991, reconnu comme l’un des meilleurs cabinets français spécialiste de la transformation écologique, EODD ingénieurs conseils apporte sa vision transversale et ses…” Source: RevenueBase Database · checked Sep 20, 2026
6	IRH Ingenieur Conseil	Indirect evidence	Ludres, FranceHQ checked Sep 20, 2026	51-200	229 contacts →
	Indirect evidence “IRH Ingénieur Conseil est membre d'Antea Group.” Source: RevenueBase Database · checked Sep 20, 2026
7	Geocean	Indirect evidence	Cassis, FranceHQ checked Sep 20, 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 20, 2026
8	Aventa	Indirect evidence	Paris, FranceHQ checked Sep 20, 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 20, 2026
9	Écosphère	Strong evidence	St.-maurice, FranceHQ checked Sep 20, 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 20, 2026
10	Setec Énergie Environnement	Indirect evidence	Paris, FranceHQ checked Sep 20, 2026	51-200	143 contacts →
	Indirect 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 20, 2026
11	Synergis Environnement	Indirect evidence	Beaucouzé, FranceHQ checked Sep 20, 2026	51-200	131 contacts →
	Indirect evidence “Synergis Environnement est un bureau d'études indépendant spécialisé dans l'ingénierie environnementale, agricole et réglementaire.” Source: RevenueBase Database · checked Sep 20, 2026
12	Artifex	Indirect evidence	Albi, FranceHQ checked Sep 20, 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 20, 2026
13	Tauw France	Indirect evidence	Dijon, FranceHQ checked Sep 20, 2026	51-200	105 contacts →
	Indirect evidence “est un bureau d’études indépendant qui vous assiste et vous conseille dans toutes vos démarches relatives à l’environnement et au développement durable, notamment sur les plans…” Source: RevenueBase Database · checked Sep 20, 2026
14	Néodyme	Indirect evidence	Joué-les-tours, FranceHQ checked Sep 20, 2026	51-200	96 contacts →
	Indirect evidence “Néodyme est un bureau d’études, d’assistance technique et de formation indépendant, dans les domaines de la maîtrise des risques industriels, professionnels et environnementaux.” Source: RevenueBase Database · checked Sep 20, 2026
15	Creocean	Indirect evidence	La Rochelle, FranceHQ checked Sep 20, 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 20, 2026
16	Stat Marine	Indirect evidence	Nîmes, FranceHQ checked Sep 20, 2026	51-200	81 contacts →
	Indirect 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 20, 2026
17	NCA Environnement	Indirect evidence	Neuville-de-poitou, FranceHQ checked Sep 20, 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 20, 2026
18	TEREA	Strong evidence	Marseille, FranceHQ checked Sep 20, 2026	11-50	73 contacts →
	Strong evidence “TEREA is a professional environmental consulting company specialized in environment and sustainable management of natural resources.” Source: RevenueBase Database · checked Sep 20, 2026
19	Envisol	Indirect evidence	La Tour Du Pin, FranceHQ checked Sep 20, 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 20, 2026
20	Ségic Ingénierie	Indirect evidence	Verrières-le-buisson, FranceHQ checked Sep 20, 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 20, 2026
21	Calidris	Indirect evidence	La Montagne, FranceHQ checked Sep 20, 2026	51-200	64 contacts →
	Indirect evidence “Calidris est un bureau d’études spécialisé dans le domaine de l’écologie.” Source: RevenueBase Database · checked Sep 20, 2026
22	Altifaune	Indirect evidence	Pézenas, FranceHQ checked Sep 20, 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 20, 2026
23	Kalies	Indirect evidence	Lezennes, FranceHQ checked Sep 20, 2026	11-50	62 contacts →
	Indirect evidence “Fort d’une expérience de plus de 25 ans, Kalies accompagne et conseille ses clients industriels, collectivités et promoteurs immobiliers dans leurs problématiques…” Source: RevenueBase Database · checked Sep 20, 2026
24	Akajoule	Indirect evidence	Saint Nazaire, FranceHQ checked Sep 20, 2026	11-50	54 contacts →
	Indirect evidence “AKAJOULE est un bureau d’étude spécialisé dans l’accompagnement et l’ingénierie en énergie et environnement.” Source: RevenueBase Database · checked Sep 20, 2026
25	Eco-Med By Eodd	Indirect evidence	Marseille, FranceHQ checked Sep 20, 2026	11-50	53 contacts →
	Indirect evidence “ECO-MED est un bureau d'études, d'expertise et de conseil en environnement naturel spécifiques à l’aménagement du territoire et à la mise en valeur des milieux naturels.” Source: RevenueBase Database · checked Sep 20, 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 environmental consulting. 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 environmental consulting.
Partial evidence: Its own public description names part of offshore environmental consulting, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name offshore environmental consulting. 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 498 offshore environmental consulting based in France

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Offshore environmental consulting based in France at a glance

As of Sep 20, 2026

33.4%Verified-email coverage

24.1Average contacts per company

1-10Median size (employees)

5.8%Largest-city concentration · Paris

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

338

11-50

119

51-200

201-500

501-1,000

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 498 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 environmental consulting, 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 environmental consulting”. 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 environmental consulting), 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 environmental consulting, 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, 4,006 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 20, 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.

Offshore environmental consulting by metro

Offshore environmental consulting in Paris29

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 environmental consulting, 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 environmental consulting are there based in France?

RevenueBase identified 498 offshore environmental consulting 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 environmental consulting?

Paris leads with 29 headquartered companies, followed by Lyon (16) and Brest (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 4,006 verified decision-maker contacts tracked across these 498 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 20, 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.