Company lists · Data refreshed September 2026

Top 25 Offshore structural engineering firms based in Nigeria

Name: Offshore structural engineering firms based in Nigeria
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 17, 2026 205 companies tracked

RevenueBase identified 205 offshore structural engineering firms headquartered in Nigeria as of September 2026 and tracks 2,706 professional contacts across them, including 358 with verified work emails. Port Harcourt is the largest hub.

This list covers offshore structural engineering firms 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 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

205Companies

2,706Contacts tracked

358Verified emails

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The 25 largest offshore structural engineering firms based in Nigeria

Ranked by team size

Top 25 of 205 offshore structural engineering firms based in Nigeria, ranked by team size, largest first. Data refreshed Sep 17, 2026. RevenueBase Smart Search rates how each company's information relates to offshore structural engineering 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	Dover Engineering Limited	Partial evidence	Port Harcourt, NigeriaHQ checked Sep 17, 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 17, 2026
2	Ariosh	Strong evidence	Lagos, NigeriaHQ checked Sep 17, 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 17, 2026
3	Kohasa Engineering Company Limited	Partial evidence	Port Harcourt, NigeriaHQ checked Sep 17, 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 17, 2026
4	Arion Energy Services Limited	Partial evidence	Lagos, NigeriaHQ checked Sep 17, 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 17, 2026
5	Elper Oilfield Engineering	Partial evidence	Lagos, NigeriaHQ checked Sep 17, 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 17, 2026
6	Frazimex Engineering Limited	Partial evidence	Port Harcourt, NigeriaHQ checked Sep 17, 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 17, 2026
7	Ranjy Construction & Foundation LTD	Indirect evidence	Lagos, NigeriaHQ checked Sep 17, 2026	201-500	40 contacts →
	Indirect evidence “the foundation you can build on” Source: RevenueBase Database · checked Sep 17, 2026
8	Emms Uf-A Consultants	Strong evidence	Gbagada, NigeriaHQ checked Sep 17, 2026	11-50	37 contacts →
	Strong evidence “EMMS UF-A is a contemporary and innovative engineering firm with vast experience in civil/structural engineering within and outside Nigeria.” Source: RevenueBase Database · checked Sep 17, 2026
9	Gremoore Limited	Strong evidence	Lekki Phase 1, NigeriaHQ checked Sep 17, 2026	501-1,000	35 contacts →
	Strong evidence “Gremoore, established in 2013, is a 100% Nigerian company and a leading indigenous provider of offshore engineering, procurement, fabrication, installation associated with…” Source: RevenueBase Database · checked Sep 17, 2026
10	Subsea100 Global	Partial evidence	Port Harcourt, NigeriaHQ checked Sep 17, 2026	11-50	30 contacts →
	Partial evidence “Overview Subsea100 Global(SHG), established in 2011, is a leading independent Offshore Services Contractor providing a range of Geophysical, Geotechnical and Subsea related…” Source: RevenueBase Database · checked Sep 17, 2026
11	Deepwater Engineering Limited DEL	Strong evidence	Warri, NigeriaHQ checked Sep 17, 2026	11-50	29 contacts →
	Strong evidence “Deepwater Engineering Limited (DEL) is a multi-discipline service provider formed by experienced professionals with years of direct experience within the major offshore Oil and…” Source: RevenueBase Database · checked Sep 17, 2026
12	Waal Energy Services Limited	Indirect evidence	Port Harcourt, NigeriaHQ checked Sep 17, 2026	51-200	29 contacts →
	Indirect evidence “Registered in 2020 and commenced business operations in October 2022, Waal Energy Services Limited is a full-spectrum technical solutions company focused on delivering end-to-end…” Source: RevenueBase Database · checked Sep 17, 2026
13	Bicens Resources Limited	Indirect evidence	Warri, NigeriaHQ checked Sep 17, 2026	501-1,000	22 contacts →
	Indirect evidence “Bicens Resources Limited is a tech savvy multidisciplinary firm with competencies in the Oil & Gas Industry, Providing and delivering exceptional solutions in DRILLING,OPERATIONS…” Source: RevenueBase Database · checked Sep 17, 2026
14	Breeze Energy Limited	Indirect evidence	Lekki, NigeriaHQ checked Sep 17, 2026	51-200	22 contacts →
	Indirect evidence “Breeze Energy Limited is a proudly African company managed by a team of seasoned professionals with extensive experience in Oil & Gas Services, Humanitarian and Disaster Relief…” Source: RevenueBase Database · checked Sep 17, 2026
15	Quest OIL And Engineering Services Limited	Partial evidence	Lagos, NigeriaHQ checked Sep 17, 2026	11-50	21 contacts →
	Partial evidence “Quest Oil and Engineering Services Limited is a value-driven company offering full-service in oil and gas, as well as engineering service.” Source: RevenueBase Database · checked Sep 17, 2026
16	Sanni, OJO & Partners Consulting Limited	Strong evidence	Somolu, NigeriaHQ checked Sep 17, 2026	51-200	20 contacts →
	Strong evidence “Sanni Ojo & Partners Consulting Limited (SO & P) is a leading Civil and Structural Engineering consultancy with over 35 years of continuous professional practice, providing…” Source: RevenueBase Database · checked Sep 17, 2026
17	Deep Water Consultancy & Engineering Services LTD	Partial evidence	Lekki, NigeriaHQ checked Sep 17, 2026	11-50	15 contacts →
	Partial evidence “DeepWater Consultancy & Engineering Services Limited is an Independent Oil and Gas Subsea technology, Pipeline management and Field development engineering consultancy company…” Source: RevenueBase Database · checked Sep 17, 2026
18	Linkso Nigeria LTD	Indirect evidence	Lagos, NigeriaHQ checked Sep 17, 2026	201-500	14 contacts →
	Indirect evidence “LINKSO NIGERIA LTD is a leading service provider in the oil and gas, power and construction industries.” Source: RevenueBase Database · checked Sep 17, 2026
19	Omiti Engineering Nigeria Limited	Partial evidence	Ibeju Lekki, NigeriaHQ checked Sep 17, 2026	11-50	14 contacts →
	Partial evidence “Omiti Engineering Nigeria Limited (OENL) is key player in Engineering, Procurement, Construction and Installation (EPCI), providing services to the Oil, Gas, Power and other…” Source: RevenueBase Database · checked Sep 17, 2026
20	Doxa Int'l Engineering Services LTD	Partial evidence	Port Harcourt, NigeriaHQ checked Sep 17, 2026	11-50	13 contacts →
	Partial evidence “Doxa Int’l Engineering Services Ltd is an engineering-based support services company bridging the gap between IOCs and OEMs.” Source: RevenueBase Database · checked Sep 17, 2026
21	Tethys Plantgeria LTD	Indirect evidence	Port Harcourt, NigeriaHQ checked Sep 17, 2026	11-50	13 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 17, 2026
22	Dextron Engineering Group	Indirect evidence	Victoria Island, NigeriaHQ checked Sep 17, 2026	201-500	12 contacts →
	Indirect evidence “DEXTRON Group is a group of companies, with its founding company, DEXTRON LIMITED U.K, providing services for the: Oil and Gas Industry Energy Industry We are highly skilled and…” Source: RevenueBase Database · checked Sep 17, 2026
23	Epic Atlantic Limited	Partial evidence	Port Harcourt, NigeriaHQ checked Sep 17, 2026	11-50	12 contacts →
	Partial evidence “Epic Atlantic Limited is an indigeneous multi-disciplinary engineering and technology company formed with a passion for technical and operational excellence for the oil and gas…” Source: RevenueBase Database · checked Sep 17, 2026
24	Offshore Dimensions Limited	Strong evidence	Lagos, NigeriaHQ checked Sep 17, 2026	11-50	11 contacts →
	Strong evidence “Offshore Dimensions Limited is a Nigerian EPC company that is committed to building engineering and construction capabilities in Nigeria.” Source: RevenueBase Database · checked Sep 17, 2026
25	Craigwal Petroshore Limited	Partial evidence	Victoria Island, NigeriaHQ checked Sep 17, 2026	51-200	7 contacts →
	Partial evidence “Our Story 100% Indigenous Craigwal Petroshore Limited is a Nigerian Engineering and Construction Company in the Oil and Gas and marine industry.” Source: RevenueBase Database · checked Sep 17, 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: offshore structural engineering 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 offshore structural engineering firms.
Partial evidence: Its own public description names part of offshore structural engineering firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name offshore structural engineering 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 205 offshore structural engineering firms based in Nigeria

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Offshore structural engineering firms based in Nigeria at a glance

As of Sep 17, 2026

13.2%Verified-email coverage

13.2Average contacts per company

11-50Median size (employees)

22.9%Largest-city concentration · Port Harcourt

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

11-50

103

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 205 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 structural engineering 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 Nigeria whose own description of what they do matches “offshore structural engineering 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 offshore structural engineering 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 offshore structural engineering firms, 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, 358 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.

Offshore structural engineering firms by metro

Offshore structural engineering firms in Port Harcourt47
Offshore structural engineering firms in Lagos45

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 structural engineering 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 offshore structural engineering firms are there based in Nigeria?

RevenueBase identified 205 offshore structural engineering firms 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?

Dover Engineering Limited, headquartered in Port Harcourt, tops this list with the largest team on record.

Which city has the most offshore structural engineering firms?

Port Harcourt leads with 47 headquartered companies, followed by Lagos (45) and Lagos State (14).

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 358 verified decision-maker contacts tracked across these 205 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.