Company lists · Data refreshed September 2026
Top 25 Marine environmental consultancies based in the United Kingdom
RevenueBase identified 1,298 marine environmental consultancies headquartered in the United Kingdom as of September 2026 and tracks 20,668 professional contacts across them, including 7,695 with verified work emails. London is the largest hub.
This list covers marine environmental consultancies headquartered in the United Kingdom, 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 14, 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.
The 25 largest marine environmental consultancies based in the United Kingdom
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 1,343 contacts → | ||||
Partial evidence “Clarksons is at the heart of maritime global shipping.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 2 | 804 contacts → | ||||
Partial evidence “The Energy and Marine Consultants - an Aqualis company.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 3 | 681 contacts → | ||||
Partial evidence “SDSD - Supporting Maritime Professionals since 1983 Software innovation to the Maritime industry for more than 30 years.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 4 | 559 contacts → | ||||
Partial evidence “Cefas (Centre for Environment, Fisheries and Aquaculture Science) is an internationally renowned aquatic scientific research and consultancy centre.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 5 | 545 contacts → | ||||
Strong evidence “Gardline is a best-in-class provider of geophysical, geotechnical and environmental marine surveys.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 6 | 490 contacts → | ||||
Indirect evidence “UTEC, Acteon’s Geo-services business line, harnesses data to optimise designs, save time and maximise your project’s economic value by providing a holistic understanding of the…” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 7 | 403 contacts → | ||||
Indirect evidence “Above, below and beyond the world’s oceans.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 8 | 387 contacts → | ||||
Strong evidence “Briggs Marine is a leading provider of marine and environmental services, specialising in port and marine operations, subsea and environmental support and vessel charter.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 9 | 217 contacts → | ||||
Partial evidence “Supported by a network of specialist consulting engineers, environmentalists and our own collective experience, our philosophy is simple: to provide a qualitative economic and…” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 10 | 206 contacts → | ||||
Indirect evidence “ONE PARTNER.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 11 | 164 contacts → | ||||
Indirect evidence “RSK Biocensus is an ecological consultancy with a presence across the country and an extensive network of ecologists throughout the UK.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 12 | 156 contacts → | ||||
Partial evidence “Aqua Consultants provide tailored environmental consultancy to broaden your thinking, lead transformation, and achieve successful outcomes.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 13 | 155 contacts → | ||||
Indirect evidence “SeaTec provides a comprehensive range of services and products to meet the needs of the shipping, offshore and defence industries.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 14 | 138 contacts → | ||||
Indirect evidence “The Engineering Consultants.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 15 | 133 contacts → | ||||
Partial evidence “Thomson Environmental Consultants are experts in environmental compliance with offices in Guildford, Leeds, Cardiff, Birmingham and Manchester.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 16 | 129 contacts → | ||||
Partial evidence “Apollo is a leading engineering and advisory consultancy working across sustainable infrastructure, marine energies, oil and gas, technical placements and digital solutions.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 17 | 128 contacts → | ||||
Partial evidence “Drewry is a leading international provider of research and consulting services to the maritime and shipping industry.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 18 | 118 contacts → | ||||
Partial evidence “With a legacy of over 30 years, we are a UK leading independent consultancy specialising in the preservation of the natural environment.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 19 | 118 contacts → | ||||
Partial evidence “Clyde Marine Recruitment is a leading provider of marine recruitment and bespoke crew management services across Europe and Asia Pacific.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 20 | 112 contacts → | ||||
Indirect evidence “In 2026, Yordas Group was acquired by 3E, the leading global provider of expert-led AI compliance solutions for chemical and workplace safety, product stewardship, and sustainable…” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 21 | 111 contacts → | ||||
Partial evidence “VIKING MARITIME GROUP is a British company with over 35 years experience, and is made up of the following 3 businesses: VIKING CREW - The leading Cruise, Superyacht, Specialist…” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 22 | 103 contacts → | ||||
Indirect evidence “Star International specialises in keeping vessels safe and compliant.” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 23 | 103 contacts → | ||||
Indirect evidence “Established in the UK in 1986, MRAG Ltd is a consultancy company dedicated to promoting sustainable use of aquatic resources through sound integrated management policies and…” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 24 | 94 contacts → | ||||
Indirect evidence “Based in Aberdeen, Axis is an independent consultancy providing specialist Exploration and Production, Decommissioning and Low Carbon expertise to the global energy industry and…” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
| 25 | 92 contacts → | ||||
Partial evidence “Our multidisciplinary teams work together to combine their expertise in ecology, the historic environment, environmental impact assessment, landscape architecture, habitat…” Source: RevenueBase Database · checked Sep 14, 2026Thanks. The Data Team will review it. | |||||
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 consultancies. 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 consultancies.
- Partial evidence
- Its own public description names part of marine environmental consultancies, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name marine environmental consultancies. 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 1,298 marine environmental consultancies based in the United Kingdom
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Marine environmental consultancies based in the United Kingdom at a glance
As of Sep 14, 2026Companies by employee count
Email recency for this list is measured worldwide rather than for United Kingdom, so it is reported there. Company counts and contact totals on this page are exact for United Kingdom, over 1,298 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 consultancies, 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 the United Kingdom whose own description of what they do matches “marine environmental consultancies”. 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 consultancies), 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 consultancies, and records with no verified work email. Companies headquartered outside United Kingdom 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, 7,695 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 14, 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.
Marine environmental consultancies by metro
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 consultancies, 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 consultancies are there based in the United Kingdom?
RevenueBase identified 1,298 marine environmental consultancies headquartered in the United Kingdom 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?
Clarksons, headquartered in London, tops this list with the largest team on record.
Which city has the most marine environmental consultancies?
London leads with 165 headquartered companies, followed by Southampton (48) and Aberdeen (41).
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 7,695 verified decision-maker contacts tracked across these 1,298 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 14, 2026.
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Download this list →Related lists
Marine environmental consultancies by geography
- Marine environmental consultancies based in Brisbane, Australia
- Marine environmental consultancies based in Melbourne, Australia
- Marine environmental consultancies based in Perth, Australia
- Marine environmental consultancies based in Sydney, Australia
- Marine environmental consultancies based in Belo Horizonte, Brazil
- Marine environmental consultancies based in Campinas, Brazil
- Marine environmental consultancies based in Curitiba, Brazil
- Marine environmental consultancies based in Porto Alegre, Brazil
- Marine environmental consultancies based in Rio De Janeiro, Brazil
- Marine environmental consultancies based in Santos, Brazil
- Marine environmental consultancies based in Sao Paulo, Brazil
- Marine environmental consultancies based in Calgary, Canada
Browse the directory
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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.
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