Company lists · Data refreshed September 2026

Top 25 Offshore environmental consulting based in Belgium

RevenueBase identified 100 offshore environmental consulting headquartered in Belgium as of September 2026 and tracks 6,106 professional contacts across them, including 3,445 with verified work emails. Antwerpen is the largest hub.

This list covers offshore environmental consulting headquartered in Belgium, 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
100Companies
6,106Contacts tracked
3,445Verified emails
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The 25 largest offshore environmental consulting based in Belgium

Ranked by team size
Top 25 of 100 offshore environmental consulting based in Belgium, 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.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1Strong evidenceBeveren-kruibeke-zwijndrecht, BelgiumHQ checked Sep 20, 20265,001-10,0004,395 contacts →

Strong evidence

“DEME (Euronext Brussels: DEME) is a leading contractor in the fields of offshore energy, dredging and marine infrastructure, and environmental remediation.”

Source: RevenueBase Database · checked Sep 20, 2026
2Indirect evidenceZwevegem, BelgiumHQ checked Sep 20, 2026501-1,000374 contacts →

Indirect evidence

“GEOxyz is an international maritime data company specialized in hydrographic, geophysical, geotechnical and topographical surveys, site investigations, renewable energy support…”

Source: RevenueBase Database · checked Sep 20, 2026
3Indirect evidenceMilmort, BelgiumHQ checked Sep 20, 202651-200146 contacts →

Indirect evidence

“G-TEC provides marine and land based geophysical surveys.”

Source: RevenueBase Database · checked Sep 20, 2026
4Indirect evidenceAntwerp, BelgiumHQ checked Sep 20, 202651-200130 contacts →

Indirect evidence

“IMDC (International Marine and Dredging Consultants) offers highly skilled expertise to tackle a wide range of water-related issues.”

Source: RevenueBase Database · checked Sep 20, 2026
5Partial evidenceGentbrugge, BelgiumHQ checked Sep 20, 202651-200101 contacts →

Partial evidence

“Trevi Environmental Solutions is a Belgian environmental technology company.”

Source: RevenueBase Database · checked Sep 20, 2026
6Partial evidenceHouthalen, BelgiumHQ checked Sep 20, 202651-20086 contacts →

Partial evidence

“RSK Benelux bvba is an evolving and innovative environmental consultancy with 8 offices in Belgium.”

Source: RevenueBase Database · checked Sep 20, 2026
7Partial evidenceLeuven (wijgmaal), BelgiumHQ checked Sep 20, 202651-20080 contacts →

Partial evidence

“We shape a vital living environment.”

Source: RevenueBase Database · checked Sep 20, 2026
8Indirect evidenceBeerse, BelgiumHQ checked Sep 20, 202651-20080 contacts →

Indirect evidence

“We are DISA International.”

Source: RevenueBase Database · checked Sep 20, 2026
9Partial evidenceZwijndrecht, BelgiumHQ checked Sep 20, 2026201-50038 contacts →

Partial evidence

“DEME Environmental Contractors (DEC) is an international environmental contractors with more than twenty years experience.”

Source: RevenueBase Database · checked Sep 20, 2026
10Indirect evidenceZwevegem, BelgiumHQ checked Sep 20, 202611-5034 contacts →

Indirect evidence

“Consultes is een allround partner voor bedrijven op vlak van milieu, preventie, energie en duurzaamheid.”

Source: RevenueBase Database · checked Sep 20, 2026
11Indirect evidenceCiney, BelgiumHQ checked Sep 20, 202611-5031 contacts →

Indirect evidence

“Bureau d'études en environnement dans les secteurs de l'eau, du sol et de l'énergie.”

Source: RevenueBase Database · checked Sep 20, 2026
12Partial evidenceBrussels, BelgiumHQ checked Sep 20, 202611-5031 contacts →

Partial evidence

“Our mission is to support decision-making towards a sustainable world." – Bernard De Caevel, Founder of RDC Environment For more than 30 years, RDC Environment has been helping…”

Source: RevenueBase Database · checked Sep 20, 2026
13Strong evidenceGent, BelgiumHQ checked Sep 20, 202611-5017 contacts →

Strong evidence

“Since the successful merge of OLFASCAN and ECOSCAN, MILVUS consulting has grown into a multidisciplinary firm offering independent, science-driven environmental advice.”

Source: RevenueBase Database · checked Sep 20, 2026
14Partial evidenceAwenne, BelgiumHQ checked Sep 20, 202611-5015 contacts →

Partial evidence

“Ecofirst SC is an ecological engineering consulting.”

Source: RevenueBase Database · checked Sep 20, 2026
15Indirect evidenceLouvain-la-neuve, BelgiumHQ checked Sep 20, 20261-1013 contacts →

Indirect evidence

“ADVISTA est un bureau d’études et de conseils en environnement et développement durable.”

Source: RevenueBase Database · checked Sep 20, 2026
16Partial evidenceNaninne, BelgiumHQ checked Sep 20, 202611-5013 contacts →

Partial evidence

“AG Environnement (for Assistance et gestion environnementale) wants to be a reliable partner to its clients dealing with environmental issues in the frame of their activities.”

Source: RevenueBase Database · checked Sep 20, 2026
17Indirect evidenceHoogstraten, BelgiumHQ checked Sep 20, 202611-5013 contacts →

Indirect evidence

“Welkom bij Landmax!”

Source: RevenueBase Database · checked Sep 20, 2026
18Indirect evidenceHasselt, BelgiumHQ checked Sep 20, 202611-5012 contacts →

Indirect evidence

“BK-Ecosys is uw partner in de immer veranderende milieu- en ingenieursbranche.”

Source: RevenueBase Database · checked Sep 20, 2026
19Indirect evidenceOostende, BelgiumHQ checked Sep 20, 20261-1011 contacts →

Indirect evidence

“SUBMAR BVBA is specialized in carrying out professional diving work, high-tech cutting and underwater hull cleaning.”

Source: RevenueBase Database · checked Sep 20, 2026
20Indirect evidenceLangemark, BelgiumHQ checked Sep 20, 202611-5010 contacts →

Indirect evidence

“Adviesbureau Decock begeleidt bedrijven en particulieren die ondersteuning nodig hebben in alles wat met milieu en omgeving te maken heeft.”

Source: RevenueBase Database · checked Sep 20, 2026
21Indirect evidenceLier, BelgiumHQ checked Sep 20, 20261-109 contacts →

Indirect evidence

“BODEMONDERZOEKEN * Oriënterend bodemonderzoek * Beschrijvend bodemonderzoek * Saneringsprojecten * Begeleiding bij saneringen * Grondverzet * Historisch onderzoek * Verkennend…”

Source: RevenueBase Database · checked Sep 20, 2026
22Indirect evidenceRoeselare, BelgiumHQ checked Sep 20, 202611-507 contacts →

Indirect evidence

“Creafarm bv is als studie- en adviesbureau actief in dienstverlening voor de landbouw en KMO.”

Source: RevenueBase Database · checked Sep 20, 2026
23Indirect evidenceGeel, BelgiumHQ checked Sep 20, 20261-107 contacts →

Indirect evidence

“Sinds 1995 biedt Thimad BVBA (acroniem van THuis In Milieu-ADvies) ‘milieudiensten’ aan op maat van bedrijven.”

Source: RevenueBase Database · checked Sep 20, 2026
24Partial evidenceEcaussinnes, BelgiumHQ checked Sep 20, 20261-107 contacts →

Partial evidence

“Wascos has been offering high quality services of consulting engineering for 20 years.”

Source: RevenueBase Database · checked Sep 20, 2026
25Indirect evidenceGembloux, BelgiumHQ checked Sep 20, 20261-106 contacts →

Indirect evidence

“Sol-Ex est un bureau d’expertise et de conseil environnemental.”

Source: RevenueBase Database · checked Sep 20, 2026

Showing 25 of 100 offshore environmental consulting based in Belgium

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Offshore environmental consulting based in Belgium at a glance

As of Sep 20, 2026
56.4%Verified-email coverage
61.1Average contacts per company
1-10Median size (employees)
6.0%Largest-city concentration · Antwerpen
Sep 20, 2026Page data refreshed

Companies by employee count

1-10
69
11-50
17
51-200
7
201-500
3
501-1,000
1
1,001-5,000
1
5,001-10,000
1

Email recency for this list is measured worldwide rather than for Belgium, so it is reported there. Company counts and contact totals on this page are exact for Belgium, over 100 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 Belgium 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 Belgium 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, 3,445 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.

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 Belgium?

RevenueBase identified 100 offshore environmental consulting headquartered in Belgium 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?

Deme Group, headquartered in Beveren-Kruibeke-Zwijndrecht, tops this list with the largest team on record.

Which city has the most offshore environmental consulting?

Antwerpen leads with 6 headquartered companies, followed by Antwerp (5) and Brussels (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 3,445 verified decision-maker contacts tracked across these 100 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.