Company lists · Data refreshed September 2026

Top 25 Subsea engineering services based in Nigeria

Name: Subsea engineering services based in Nigeria
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 18, 2026 395 companies tracked

RevenueBase identified 395 subsea engineering services headquartered in Nigeria as of September 2026 and tracks 7,807 professional contacts across them, including 1,217 with verified work emails. Port Harcourt is the largest hub.

This list covers subsea engineering services headquartered in Nigeria, 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 18, 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 18, 2026 86% judged on-target in blind review

395Companies

7,807Contacts tracked

1,217Verified emails

Explore this list → Free signup · no credit card · 500 free credits

The 25 largest subsea engineering services based in Nigeria

Ranked by team size

Top 25 of 395 subsea engineering services based in Nigeria, ranked by team size, largest first. Data refreshed Sep 18, 2026. RevenueBase Smart Search rates how each company's information relates to subsea engineering services: 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	Nestoil Limited	Partial evidence	Victoria Island, NigeriaHQ checked Sep 18, 2026	1,001-5,000	700 contacts →
	Partial evidence “Nestoil is Nigeria’s largest indigenous Engineering, Procurement, Construction and Commissioning (EPCC) Company in the Oil and Gas sector and has been a significant contributor to…” Source: RevenueBase Database · checked Sep 18, 2026
2	Alcon Nigeria LTD	Indirect evidence	Port Harcourt, NigeriaHQ checked Sep 18, 2026	1,001-5,000	417 contacts →
	Indirect evidence “ALCON Nigeria Limited commenced operation on the 10th day of May 1982 as MED Construction, incorporated with registration no: RC 47042.” Source: RevenueBase Database · checked Sep 18, 2026
3	Hydrodive Group	Indirect evidence	Lagos, NigeriaHQ checked Sep 18, 2026	201-500	409 contacts →
	Indirect evidence “HydroDive provides a broad range of Marine Vessels, Air, Mixed Gas and Saturation Diving, ROV, AUV and Survey Services primarily to the offshore & inshore Petroleum Industry of…” Source: RevenueBase Database · checked Sep 18, 2026
4	Aveon Offshore Limited	Partial evidence	Port Harcourt, NigeriaHQ checked Sep 18, 2026	501-1,000	394 contacts →
	Partial evidence “Aveon Offshore Limited is an engineering and fabrication services company that has been providing construction and general fabrication services for the oil and gas industry since…” Source: RevenueBase Database · checked Sep 18, 2026
5	Marine Platforms Limited	Indirect evidence	Victoria Island, NigeriaHQ checked Sep 18, 2026	201-500	377 contacts →
	Indirect evidence “Marine Platforms is an oil service company focused on providing diverse services to the upstream sector of the oil & gas industry in Nigeria and the African continent sustainably.” Source: RevenueBase Database · checked Sep 18, 2026
6	Dover Engineering Limited	Partial evidence	Port Harcourt, NigeriaHQ checked Sep 18, 2026	501-1,000	315 contacts →
	Partial evidence “Dover Engineering Limited is a reputable Engineering Design,EPC, Operations & Maintenance Company.” Source: RevenueBase Database · checked Sep 18, 2026
7	Ariosh	Strong evidence	Lagos, NigeriaHQ checked Sep 18, 2026	201-500	243 contacts →
	Strong evidence “Ariosh delivers engineering and construction services in the onshore, offshore and subsea segment of the oil and gas sector in Nigeria, West Africa.” Source: RevenueBase Database · checked Sep 18, 2026
8	Seflam SGL	Partial evidence	Victoria Island, NigeriaHQ checked Sep 18, 2026	201-500	220 contacts →
	Partial evidence “A foremost provider of Engineering, Procurement, Construction, & Installation Services to the Nigerian Oil and Gas Industry.” Source: RevenueBase Database · checked Sep 18, 2026
9	Laser Engineering And Resources Consultants Limited	Strong evidence	Port-harcourt, NigeriaHQ checked Sep 18, 2026	51-200	140 contacts →
	Strong evidence “Laser Engineering is a Petroleum Engineering Consultancy outfit specializing in surface and subsurface studies including well test services.” Source: RevenueBase Database · checked Sep 18, 2026
10	Kohasa Engineering Company Limited	Partial evidence	Port Harcourt, NigeriaHQ checked Sep 18, 2026	11-50	139 contacts →
	Partial evidence “Kohasa Engineering Company Limited is an oil and energy company based out of Plot 474, Trans Amadi industrial layout, Port Harcourt, RIVERS, Nigeria.” Source: RevenueBase Database · checked Sep 18, 2026
11	LEE Engineering And Construction Company LTD	Partial evidence	Ikoyi, NigeriaHQ checked Sep 18, 2026	501-1,000	114 contacts →
	Partial evidence “Lee Engineering and Construction Co.” Source: RevenueBase Database · checked Sep 18, 2026
12	Arion Energy Services Limited	Partial evidence	Lagos, NigeriaHQ checked Sep 18, 2026	51-200	114 contacts →
	Partial evidence “Arion Energy Services is an engineering, projects, and operations service provider to the oil and gas, power and maritime industries.” Source: RevenueBase Database · checked Sep 18, 2026
13	Emval Nigeria Limited	Indirect evidence	Lekki, NigeriaHQ checked Sep 18, 2026	51-200	109 contacts →
	Indirect evidence “The Company Emval Nigeria Limited is a servicing company that provides onshore and offshore technical services to the Oil & Gas industry.” Source: RevenueBase Database · checked Sep 18, 2026
14	Rosetti Pivot LTD	Partial evidence	Lagos, NigeriaHQ checked Sep 18, 2026	51-200	84 contacts →
	Partial evidence “Rosetti Pivot Limited provides an array of engineering, procurement, and construction services to the oil & gas sectors within Nigeria and the Sub-Saharan Africa region, using…” Source: RevenueBase Database · checked Sep 18, 2026
15	Natony Limited	Indirect evidence	Warri, NigeriaHQ checked Sep 18, 2026	51-200	75 contacts →
	Indirect evidence “NATONY LIMITED RC.105963 is a Nigerian Contracting Company Engaged in Civil, Mechanical Fabrications and Installation, Electrical and Instrumentation, Diving / Remote Operated…” Source: RevenueBase Database · checked Sep 18, 2026
16	Aviam Offshore Engineering Company Limited	Partial evidence	Lagos, NigeriaHQ checked Sep 18, 2026	201-500	73 contacts →
	Partial evidence “AOECL provides Drilling & Well completion, Manpower, Procurement, Dredging, Inspection, and EPCI services (Engineering, Procurement, Technical Consultancy, Facility Maintenance…” Source: RevenueBase Database · checked Sep 18, 2026
17	Peso Energy Services	Partial evidence	Lekki Phase 1, NigeriaHQ checked Sep 18, 2026	201-500	72 contacts →
	Partial evidence “PESO Energy Services is a leader in the Oil and Gas services industry, specializing in Engineering Services, Early Production Facility Packages, Oil Field Services, Specialized…” Source: RevenueBase Database · checked Sep 18, 2026
18	Elper Oilfield Engineering	Partial evidence	Lagos, NigeriaHQ checked Sep 18, 2026	501-1,000	70 contacts →
	Partial evidence “ELPER has built in time, a strong international network, and a specialized engineering company, providing services ranging from Engineering Procurement & Construction to Marine…” Source: RevenueBase Database · checked Sep 18, 2026
19	Crestech Engineering Limited, Lagos - Nigeria	Partial evidence	Lagos, NigeriaHQ checked Sep 18, 2026	51-200	67 contacts →
	Partial evidence “Crestech is an Engineering Design and Project Management Company with its head office in Victoria Island, Lagos, Nigeria.” Source: RevenueBase Database · checked Sep 18, 2026
20	Frazimex Engineering Limited	Partial evidence	Port Harcourt, NigeriaHQ checked Sep 18, 2026	201-500	58 contacts →
	Partial evidence “FRAZIMEX ENGINEERING LIMITED, a member of Oilserv group was incorporated in 2005 under the laws of the Federal republic of Nigeria as a private limited liability company that…” Source: RevenueBase Database · checked Sep 18, 2026
21	Sellafield Energy	Indirect evidence	Lekki, NigeriaHQ checked Sep 18, 2026	11-50	56 contacts →
	Indirect evidence “Sellafield Energy is a leading oil and gas support provider that has within a short time, emerged as a reference point in recruitment services and technical manpower support…” Source: RevenueBase Database · checked Sep 18, 2026
22	Homeland Integrated Offshore Services Limited	Partial evidence	Lagos, NigeriaHQ checked Sep 18, 2026	51-200	55 contacts →
	Partial evidence “Homeland Integrated Offshore Services Limited is a multi disciplinary organization for Engineering, Procurement, Construction and Installation services.” Source: RevenueBase Database · checked Sep 18, 2026
23	Ashbard Energy Company Limited	Partial evidence	Port - Harcourt, NigeriaHQ checked Sep 18, 2026	201-500	49 contacts →
	Partial evidence “Incorporated in 2004, Ashbard Energy Company Limited is an indigenous engineering services provider.” Source: RevenueBase Database · checked Sep 18, 2026
24	Deltatek Offshore Limited	Partial evidence	Lagos, NigeriaHQ checked Sep 18, 2026	201-500	48 contacts →
	Partial evidence “DeltaTek Offshore Ltd is a leading Engineering, Procurement, Installation, Construction, and Commissioning (EPICC) service provider in the oil and gas sector of Sub-Sahara Africa.” Source: RevenueBase Database · checked Sep 18, 2026
25	Nigerstar7 Limited	Partial evidence	Lagos, NigeriaHQ checked Sep 18, 2026	51-200	48 contacts →
	Partial evidence “With headquarters in Lagos, Nigeria, NigerStar7 is a company wholly owned by Subsea7.” Source: RevenueBase Database · checked Sep 18, 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: subsea engineering services. 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 subsea engineering services.
Partial evidence: Its own public description names part of subsea engineering services, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name subsea engineering services. 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 395 subsea engineering services based in Nigeria

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 1,217 reachable decision-makers.

Free signup · no credit card

View the full list →

Subsea engineering services based in Nigeria at a glance

As of Sep 18, 2026

15.6%Verified-email coverage

19.8Average contacts per company

11-50Median size (employees)

26.3%Largest-city concentration · Port Harcourt

Sep 18, 2026Page data refreshed

Companies by employee count

1-10

11-50

165

51-200

201-500

501-1,000

1,001-5,000

10001+

Email recency for this list is measured worldwide rather than for Nigeria, so it is reported there. Company counts and contact totals on this page are exact for Nigeria, over 395 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 subsea engineering services, 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 Nigeria whose own description of what they do matches “subsea engineering services”. 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 subsea engineering services), 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 subsea engineering services, and records with no verified work email. Companies headquartered outside Nigeria 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, 1,217 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 18, 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.

Subsea engineering services by metro

Subsea engineering services in Port Harcourt104
Subsea engineering services in Lagos73
Subsea engineering services in Lagos State28

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 subsea engineering services, 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 subsea engineering services are there based in Nigeria?

RevenueBase identified 395 subsea engineering services headquartered in Nigeria 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?

Nestoil Limited, headquartered in Victoria Island Lagos, tops this list with the largest team on record.

Which city has the most subsea engineering services?

Port Harcourt leads with 104 headquartered companies, followed by Lagos (73) and Lagos State (28).

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 1,217 verified decision-maker contacts tracked across these 395 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 18, 2026.

Ready to reach these companies? Verified emails and direct dials for all 395 subsea engineering services based in Nigeria. Start with a free account, no credit card.

Download this list →

Related lists

Subsea engineering services by geography

Browse the directory

Browse: Companies home · All Nigeria lists · All Subsea engineering services lists · New lists

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.