Company lists · Data refreshed September 2026

Top 11 Offshore engineering companies based in South Korea

RevenueBase identified 38 offshore engineering companies headquartered in South Korea as of September 2026 and tracks 3,406 professional contacts across them, including 146 with verified work emails. Busan is the largest hub.

This list covers offshore engineering companies headquartered in South Korea, 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
38Companies
3,406Contacts tracked
146Verified emails
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The 11 largest offshore engineering companies based in South Korea

Ranked by team size
Top 11 of 38 offshore engineering companies based in South Korea, ranked by team size, largest first. Data refreshed Sep 17, 2026. RevenueBase Smart Search rates how each company's information relates to offshore 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.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1Indirect evidenceGeoje-si, South KoreaHQ checked Sep 17, 202610001+976 contacts →

Indirect evidence

“Global Ocean Solution Provider Hanwha Ocean Hanwha Ocean provides sustainable global ocean solutions, backed by over 40 years of accumulated expertise in world-class shipbuilding…”

Source: RevenueBase Database · checked Sep 17, 2026
2Indirect evidenceBusan, South KoreaHQ checked Sep 17, 202651-200208 contacts →

Indirect evidence

“COENS is a total support services provider to clients and consultants in the Oil and Gas Industry.”

Source: RevenueBase Database · checked Sep 17, 2026
3Partial evidence성남시, South KoreaHQ checked Sep 17, 20265,001-10,000152 contacts →

Partial evidence

“Samsung Heavy Industries has successfully completed many of the world's first and largest shipbuilding and offshore EPC projects, with the sole aim of establishing global…”

Source: RevenueBase Database · checked Sep 17, 2026
4Strong evidenceGoseong-gun, South KoreaHQ checked Sep 17, 2026501-1,00028 contacts →

Strong evidence

“We design and build offshore wind foundations, special vessels, offshore plants, and steel pipes, engineering sustainable solutions from the ocean.”

Source: RevenueBase Database · checked Sep 17, 2026
5Partial evidenceUlsan, South KoreaHQ checked Sep 17, 2026201-50024 contacts →

Partial evidence

“Based on our differentiated technology and clients'confidence, GS Entec contributes to making the world more energetic and vibrant by engineering and manufacturing the equipments…”

Source: RevenueBase Database · checked Sep 17, 2026
6Strong evidenceSeoul, South KoreaHQ checked Sep 17, 202611-508 contacts →

Strong evidence

“Foresys is composed of qualified experts specialized in marine, offshore and subsea infrastructure engineering.”

Source: RevenueBase Database · checked Sep 17, 2026
7Strong evidenceBusan, South KoreaHQ checked Sep 17, 202651-2008 contacts →

Strong evidence

“Founded in 2004, FG is an offshore and marine engineering total service company, specializing in offshore hull side detailed & production engineering.”

Source: RevenueBase Database · checked Sep 17, 2026
8Partial evidenceBusan, South KoreaHQ checked Sep 17, 202611-507 contacts →

Partial evidence

“An ocean engineering company provides system for aquaculture and energy”

Source: RevenueBase Database · checked Sep 17, 2026
9Partial evidenceSeoul, South KoreaHQ checked Sep 17, 202611-505 contacts →

Partial evidence

“We would like to highlight that MEGALINE, as a world leading heavy transportation contractor, has successfully executed various major onshore/offshore projects such as NOC Gallaf…”

Source: RevenueBase Database · checked Sep 17, 2026
10Partial evidenceGijang-Eup, South KoreaHQ checked Sep 17, 202651-2004 contacts →

Partial evidence

“Specialized in engineering, manufacturing, installation and maintenance of port & vessel equipment and infrastructure.#port equipment #port handling #goliath crane #sea…”

Source: RevenueBase Database · checked Sep 17, 2026
11Indirect evidenceBusan, South KoreaHQ checked Sep 17, 202611-502 contacts →

Indirect evidence

“We are a leading international provider of diversified products, services and solutions to customers in the Marine and Energy sectors.”

Source: RevenueBase Database · checked Sep 17, 2026

Showing 11 of 38 offshore engineering companies based in South Korea

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Offshore engineering companies based in South Korea at a glance

As of Sep 17, 2026
4.3%Verified-email coverage
89.6Average contacts per company
11-50Median size (employees)
18.4%Largest-city concentration · Busan
Sep 17, 2026Page data refreshed

Companies by employee count

1-10
6
11-50
14
51-200
11
201-500
3
501-1,000
1
5,001-10,000
1
10001+
2

Email recency for this list is measured worldwide rather than for South Korea, so it is reported there. Company counts and contact totals on this page are exact for South Korea, over 38 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 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 South Korea whose own description of what they do matches “offshore 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 offshore 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 offshore engineering companies, and records with no verified work email. Companies headquartered outside South Korea 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, 146 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 offshore 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 offshore engineering companies are there based in South Korea?

RevenueBase identified 38 offshore engineering companies headquartered in South Korea 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?

Hanwha Ocean, headquartered in Geoje-Si, tops this list with the largest team on record.

Which city has the most offshore engineering companies?

Busan leads with 7 headquartered companies, followed by Seoul (6) and Ulsan (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 146 verified decision-maker contacts tracked across these 38 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.