Company lists · Data refreshed September 2026

Top 25 Offshore engineering companies based in Port Harcourt, Nigeria

Name: Offshore engineering companies based in Port Harcourt, Nigeria
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 17, 2026 240 companies tracked

RevenueBase identified 240 offshore engineering companies headquartered in Port Harcourt, Nigeria as of September 2026 and tracks 3,480 professional contacts across them, including 351 with verified work emails. Port Harcourt is the largest hub.

This list covers offshore engineering companies headquartered in Port Harcourt, 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

240Companies

3,480Contacts tracked

351Verified emails

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The 25 largest offshore engineering companies based in Port Harcourt, Nigeria

Ranked by team size

Top 25 of 240 offshore engineering companies based in Port Harcourt, Nigeria, 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.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Alcon Nigeria LTD	Indirect evidence	Port Harcourt, NigeriaHQ checked Sep 17, 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 17, 2026
2	Aveon Offshore Limited	Strong evidence	Port Harcourt, NigeriaHQ checked Sep 17, 2026	501-1,000	394 contacts →
	Strong 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 17, 2026
3	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
4	Hydroserve Group	Indirect evidence	Port Harcourt, NigeriaHQ checked Sep 17, 2026	51-200	86 contacts →
	Indirect evidence “Hydroserve Group is a leading oil and gas company which started as Hydroserve Oil Services Nigeria Limited in November, We began operations in with Pipeline & Process, and Pumping…” Source: RevenueBase Database · checked Sep 17, 2026
5	Vagan OIL And GAS Limited	Indirect evidence	Port Harcourt, NigeriaHQ checked Sep 17, 2026	201-500	66 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 17, 2026
6	Pegis Global Services Limited	Indirect evidence	Port Harcourt, NigeriaHQ checked Sep 17, 2026	11-50	57 contacts →
	Indirect evidence “PEGIS GLOBAL Services Limited (PGSL) is a fast growing indigenous company with operational base in Port Harcourt, focused on providing services in the Oil and gas Industry in the…” Source: RevenueBase Database · checked Sep 17, 2026
7	Bridgsite Nigeria Limited BNL	Partial evidence	Port Harcourt, NigeriaHQ checked Sep 17, 2026	201-500	55 contacts →
	Partial evidence “BRIDGSITE NIGERIA LIMITED (BNL) is an indigenous Engineering and Construction Services Company engaged in the provision of solution oriented, cost effective and responsive high…” Source: RevenueBase Database · checked Sep 17, 2026
8	Power & Energy OIL Tools	Partial evidence	Port Harcourt, NigeriaHQ checked Sep 17, 2026	51-200	47 contacts →
	Partial evidence “Power and Energy Oil Tools Ltd is a Nigerian well engineering company.” Source: RevenueBase Database · checked Sep 17, 2026
9	True-Blue Energy Services Limited	Partial evidence	Port Harcourt, NigeriaHQ checked Sep 17, 2026	51-200	40 contacts →
	Partial evidence “True-Blue Energy Services Limited, a fully indigenous oil and gas services company in Nigeria with proven capacity for supporting clients/major projects in Onshore and Offshore…” Source: RevenueBase Database · checked Sep 17, 2026
10	Dovewell Oilfield Services Limited	Indirect evidence	Port Harcourt, NigeriaHQ checked Sep 17, 2026	11-50	38 contacts →
	Indirect evidence “Dovewell Oilfield Services Limited is a fully Nigerian owned oil and gas service company.” Source: RevenueBase Database · checked Sep 17, 2026
11	Felton Energy Services Limited	Indirect evidence	Port Harcourt, NigeriaHQ checked Sep 17, 2026	51-200	35 contacts →
	Indirect evidence “Felton Energy Services Ltd (FESL) is an indigenous oil & gas procurement, operation and maintenance company in Nigeria.” 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	Weam And Company Limited	Partial evidence	Port Harcourt, NigeriaHQ checked Sep 17, 2026	51-200	28 contacts →
	Partial evidence “Weam and Company Limited, established in 1985, is an ISO 9001:2015 and COREN certified multidisciplinary engineering services company, providing a diverse range of client-focused…” Source: RevenueBase Database · checked Sep 17, 2026
14	Union Energy Services LTD	Partial evidence	Port Harcourt, NigeriaHQ checked Sep 17, 2026	11-50	22 contacts →
	Partial evidence “Union Energy Services Limited is a well established and wholly owned Nigerian company providing Energy and Engineering Services.” Source: RevenueBase Database · checked Sep 17, 2026
15	Hopic Nigeria LTD	Indirect evidence	Port Harcourt, NigeriaHQ checked Sep 17, 2026	11-50	20 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 17, 2026
16	Roadlamp Limited	Indirect evidence	Port Harcourt, NigeriaHQ checked Sep 17, 2026	11-50	19 contacts →
	Indirect evidence “The Company was incorporated in 2005 with its base in Port Harcourt, Nigeria.” Source: RevenueBase Database · checked Sep 17, 2026
17	Atma Global Resources Limited	Partial evidence	Port Harcourt, NigeriaHQ checked Sep 17, 2026	11-50	17 contacts →
	Partial evidence “Atma Global Resources Limited is a wholly Nigerian Engineering Procurement, Installation, Maintenance, and Commissioning Company created for the purpose of providing services to…” Source: RevenueBase Database · checked Sep 17, 2026
18	Benuovo Limited	Partial evidence	Port Harcourt, NigeriaHQ checked Sep 17, 2026	51-200	13 contacts →
	Partial evidence “Benuovo Limited is a fast-growing indigenous Nigerian Engineering, Procurement, Construction, and Installation (EPCI) company duly incorporated under the companies and allied…” Source: RevenueBase Database · checked Sep 17, 2026
19	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
20	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
21	Regency International LTD	Indirect evidence	Port Harcourt, NigeriaHQ checked Sep 17, 2026	11-50	11 contacts →
	Indirect evidence “Regency International Ltd is a 100% indigenous Nigerian private company with a vision to becoming a world-class company.” Source: RevenueBase Database · checked Sep 17, 2026
22	Ramec Integrated Services Limited Risl A Subsidiary Of Ramec Group	Indirect evidence	Port Harcourt, NigeriaHQ checked Sep 17, 2026	51-200	10 contacts →
	Indirect evidence “RAMEC Integrated Services Limited (RISL) is a subsidiary of the RAMEC GROUP, a wholly indigenous Nigerian company, offering services in Directional Drilling, Measurement While…” Source: RevenueBase Database · checked Sep 17, 2026
23	Mesc Energy Services	Indirect evidence	Port Harcourt, NigeriaHQ checked Sep 17, 2026	11-50	8 contacts →
	Indirect evidence “MESC Energy Services offers drilling, well intervention, pipeline and asset integrity services focused to deliver efficiency.” Source: RevenueBase Database · checked Sep 17, 2026
24	Bonnedo Engineering And General Services Limited	Partial evidence	Port Harcourt, NigeriaHQ checked Sep 17, 2026	11-50	6 contacts →
	Partial evidence “Bonnedo Engineering and General Services Ltd is an indigenous oil servicing Nigerian firm permitted by Department of Petroleum Resources(DPR) and prequalified by Nigeria Petroleum…” Source: RevenueBase Database · checked Sep 17, 2026
25	Arcworld OIL And GAS Limited	Indirect evidence	Port Harcourt, NigeriaHQ checked Sep 17, 2026	11-50	6 contacts →
	Indirect evidence “Arcworld Oil & Gas Limited is a major supplier of a wide range of oil field equipment and materials.” 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 engineering companies. 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 engineering companies.
Partial evidence: Its own public description names part of offshore engineering companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name offshore engineering companies. 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 240 offshore engineering companies based in Port Harcourt, Nigeria

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Offshore engineering companies based in Port Harcourt, Nigeria at a glance

As of Sep 17, 2026

10.1%Verified-email coverage

14.5Average contacts per company

11-50Median size (employees)

100.0%Largest-city concentration · Port Harcourt

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

Email recency for this list is measured across the whole Nigeria list rather than for Port Harcourt, so it is reported there. Company counts and contact totals on this page are exact for Port Harcourt, over 240 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 Port Harcourt, Nigeria 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 Port Harcourt 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, 351 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 engineering companies by metro in Nigeria

Offshore engineering companies in Port Harcourt240
Offshore engineering companies in Lagos187
Offshore engineering companies in Lagos State49
Offshore engineering companies in Rivers42
Offshore engineering companies in Lekki Lagos29
Offshore engineering companies in Warri29

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 Port Harcourt, Nigeria?

RevenueBase identified 240 offshore engineering companies headquartered in Port Harcourt, 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?

Alcon Nigeria LTD, headquartered in Port Harcourt, tops this list with the largest team on record.

Which city has the most offshore engineering companies?

Port Harcourt leads with 240 headquartered companies, followed by Lagos (187) and Lagos State (49).

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 351 verified decision-maker contacts tracked across these 240 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.