Company lists · Data refreshed September 2026

Top 25 Marine and subsea consulting firms based in Greece

Name: Marine and subsea consulting firms based in Greece
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 223 companies tracked

RevenueBase identified 223 marine and subsea consulting firms headquartered in Greece as of September 2026 and tracks 3,022 professional contacts across them, including 1,053 with verified work emails. Athens is the largest hub.

This list covers marine and subsea consulting firms headquartered in Greece, 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 28, 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 28, 2026 86% judged on-target in blind review

223Companies

3,022Contacts tracked

1,053Verified emails

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The 25 largest marine and subsea consulting firms based in Greece

Ranked by team size

Top 25 of 223 marine and subsea consulting firms based in Greece, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to marine and subsea consulting firms: 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	asso.subsea	Partial evidence	Elefsina, GreeceHQ checked Sep 28, 2026	501-1,000	478 contacts →
	Partial evidence “ASSO group is a technology driven company specialized to provide services and sub-sea equipment for underwater works in the marine and offshore field.” Source: RevenueBase Database · checked Sep 28, 2026
2	Salfo & Associates SA	Partial evidence	Athens, GreeceHQ checked Sep 28, 2026	201-500	361 contacts →
	Partial evidence “About SALFO & Associates SALFO & Associates SA is a premier Greek Engineering & Management Consulting firm, delivering excellence through innovation, integrity, and human-centric…” Source: RevenueBase Database · checked Sep 28, 2026
3	ENOIA	Indirect evidence	Athens, GreeceHQ checked Sep 28, 2026	201-500	211 contacts →
	Indirect evidence “ENOIA is a Multi-Disciplinary Engineering & Project Management Consultant in the Energy, Water and Industrial sector.” Source: RevenueBase Database · checked Sep 28, 2026
4	Asprofos Engineering	Indirect evidence	Athens, GreeceHQ checked Sep 28, 2026	201-500	132 contacts →
	Indirect evidence “ASPROFOS Engineering is a leading engineering consultancy company in the Oil & Gas Sector operating in accordance to internationally recognized standards and practices.” Source: RevenueBase Database · checked Sep 28, 2026
5	Hydrus	Partial evidence	Agia Paraskevi, GreeceHQ checked Sep 28, 2026	201-500	103 contacts →
	Partial evidence “Hydrus is a global engineering firm delivering technologies and services in the Maritime, Energy, Oil and Gas Sectors.” Source: RevenueBase Database · checked Sep 28, 2026
6	Spanopoulos Group	Partial evidence	Perama, GreeceHQ checked Sep 28, 2026	201-500	100 contacts →
	Partial evidence “The Group was founded 50 years ago, with the profound goal of becoming established in the maritime section.” Source: RevenueBase Database · checked Sep 28, 2026
7	Alpha Marine Consulting P.C	Strong evidence	Piraeus, GreeceHQ checked Sep 28, 2026	51-200	81 contacts →
	Strong evidence “Alpha Marine Consulting (AMC) is a leading marine consultancy firm, ranking among the largest in Europe.” Source: RevenueBase Database · checked Sep 28, 2026
8	Kalimbassieris Maritime	Partial evidence	Pireás, GreeceHQ checked Sep 28, 2026	51-200	65 contacts →
	Partial evidence “We are a marine consultancy firm offering both in depth technical expertise and claims handling services.” Source: RevenueBase Database · checked Sep 28, 2026
9	Technava S.A	Partial evidence	Paleo Faliro, GreeceHQ checked Sep 28, 2026	51-200	47 contacts →
	Partial evidence “Technava was founded in 1968 aiming to supply marine equipment and technical support to the Greek Shipping Industry.” Source: RevenueBase Database · checked Sep 28, 2026
10	C&m Engineering S.A	Partial evidence	Athens, GreeceHQ checked Sep 28, 2026	51-200	46 contacts →
	Partial evidence “C&M Engineering is a Consulting Engineering company, in Project Management & Control, Design & Engineering, Construction Management, operating in South-East Europe.” Source: RevenueBase Database · checked Sep 28, 2026
11	Power SUB Link SA PSL	Partial evidence	Athens, GreeceHQ checked Sep 28, 2026	51-200	46 contacts →
	Partial evidence “PSL has supported major contractors in the subsea cable industry for over 30+years, globally.” Source: RevenueBase Database · checked Sep 28, 2026
12	Gaia SA	Indirect evidence	Thessaloniki, GreeceHQ checked Sep 28, 2026	51-200	45 contacts →
	Indirect evidence “GAIA S.A.” Source: RevenueBase Database · checked Sep 28, 2026
13	Diving Status	Indirect evidence	Acharnes, GreeceHQ checked Sep 28, 2026	51-200	39 contacts →
	Indirect evidence “DIVING STATUS is licensed and certified to perform commercial underwater and diving services including underwater ship repair, ship maintenance, classification society approved…” Source: RevenueBase Database · checked Sep 28, 2026
14	Roikos Engineering Consultants S.A	Indirect evidence	Metamorfosi, GreeceHQ checked Sep 28, 2026	51-200	32 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 28, 2026
15	Marnet S.A	Strong evidence	Αθήνα, GreeceHQ checked Sep 28, 2026	11-50	27 contacts →
	Strong evidence “The Marine Applied Research and New Technologies S.A.(MARNET S.A.) was established in 1993 in Greece, as a consulting and research engineering company.” Source: RevenueBase Database · checked Sep 28, 2026
16	Ogenus Offshore	Indirect evidence	GreeceHQ checked Sep 28, 2026	51-200	27 contacts →
	Indirect evidence “Based in Greece and UK, Ogenus Offshore specializes in providing highly skilled personnel for Oil, Gas, and Renewable Energy sectors.” Source: RevenueBase Database · checked Sep 28, 2026
17	Bpco LTD Ship Brokers	Indirect evidence	Athens, GreeceHQ checked Sep 28, 2026	11-50	26 contacts →
	Indirect evidence “Since 2006 BPCO LTD Ship Brokers has provided a wide range of services to the shipping industry, focused on shiprepairs, shipbuilding equipment, spare parts, underwater services…” Source: RevenueBase Database · checked Sep 28, 2026
18	Baluco LTD	Strong evidence	Glyfada, GreeceHQ checked Sep 28, 2026	11-50	25 contacts →
	Strong evidence “BALUCO LTD is an International marine bunkers & lubricants consulting company serving the global shipping market with consistency by providing leading service worldwide.” Source: RevenueBase Database · checked Sep 28, 2026
19	Dynamarine	Partial evidence	Glyfada, GreeceHQ checked Sep 28, 2026	11-50	23 contacts →
	Partial evidence “Dynamarine is a company that provides consultancy services to the maritime community associated with technical studies, statutory compliance issues, condition surveys and risk…” Source: RevenueBase Database · checked Sep 28, 2026
20	Margetis Maritime	Partial evidence	Piraeus, GreeceHQ checked Sep 28, 2026	11-50	22 contacts →
	Partial evidence “Our vision is to be next to our marine clients 24/7, all over the world, providing a full range of services necessary to international maritime institutions and investors…” Source: RevenueBase Database · checked Sep 28, 2026
21	Oceanic Marine Services	Indirect evidence	Athens, GreeceHQ checked Sep 28, 2026	11-50	22 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 28, 2026
22	Nova Electronics S.A	Indirect evidence	Piraeus, GreeceHQ checked Sep 28, 2026	11-50	21 contacts →
	Indirect evidence “Founded in 1988 in Piraeus, Greece, and ever since NOVA Electronics, as a commercial and technical company, has gained internationally acclaimed recognition for the quality of…” Source: RevenueBase Database · checked Sep 28, 2026
23	ETME	Indirect evidence	Neo Psichiko, GreeceHQ checked Sep 28, 2026	11-50	18 contacts →
	Indirect evidence “With a history of more than 45 years in engineering design and project management, ETME S.A.” Source: RevenueBase Database · checked Sep 28, 2026
24	Engineering Force	Indirect evidence	Iraklio Attikis, GreeceHQ checked Sep 28, 2026	51-200	16 contacts →
	Indirect evidence “Engineering Force is a high-end engineering company located in Athens, Greece.” Source: RevenueBase Database · checked Sep 28, 2026
25	Pipeserv Engineering	Partial evidence	Athens, GreeceHQ checked Sep 28, 2026	11-50	15 contacts →
	Partial evidence “Pipeserv is an engineering, construction and consulting partner for industrial projects.” Source: RevenueBase Database · checked Sep 28, 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 and subsea consulting firms. 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 and subsea consulting firms.
Partial evidence: Its own public description names part of marine and subsea consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name marine and subsea consulting firms. 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 223 marine and subsea consulting firms based in Greece

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Marine and subsea consulting firms based in Greece at a glance

As of Sep 28, 2026

34.8%Verified-email coverage

13.6Average contacts per company

11-50Median size (employees)

23.8%Largest-city concentration · Athens

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

106

11-50

51-200

201-500

501-1,000

Email recency for this list is measured worldwide rather than for Greece, so it is reported there. Company counts and contact totals on this page are exact for Greece, over 223 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 and subsea consulting firms, 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 Greece whose own description of what they do matches “marine and subsea consulting firms”. 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 and subsea consulting firms), 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 and subsea consulting firms, and records with no verified work email. Companies headquartered outside Greece 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, 1,053 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 28, 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 and subsea consulting firms 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 and subsea consulting firms, 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 and subsea consulting firms are there based in Greece?

RevenueBase identified 223 marine and subsea consulting firms headquartered in Greece 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?

asso.subsea, headquartered in Greece, tops this list with the largest team on record.

Which city has the most marine and subsea consulting firms?

Athens leads with 53 headquartered companies, followed by Piraeus (35) and Attica (5).

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 1,053 verified decision-maker contacts tracked across these 223 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 28, 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.