Company lists · Data refreshed September 2026

Top 25 Platform topsides installation companies based in Nigeria

Name: Platform topsides installation companies based in Nigeria
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 29, 2026 131 companies tracked

RevenueBase identified 131 platform topsides installation companies headquartered in Nigeria as of September 2026 and tracks 2,884 professional contacts across them, including 334 with verified work emails. Port Harcourt is the largest hub.

This list covers platform topsides installation companies 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 29, 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 29, 2026 86% judged on-target in blind review

131Companies

2,884Contacts tracked

334Verified emails

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The 25 largest platform topsides installation companies based in Nigeria

Ranked by team size

Top 25 of 131 platform topsides installation companies based in Nigeria, ranked by team size, largest first. Data refreshed Sep 29, 2026. RevenueBase Smart Search rates how each company's information relates to platform topsides installation 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 29, 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 29, 2026
2	Dover Engineering Limited	Indirect evidence	Port Harcourt, NigeriaHQ checked Sep 29, 2026	501-1,000	315 contacts →
	Indirect evidence “Dover Engineering Limited is a reputable Engineering Design,EPC, Operations & Maintenance Company.” Source: RevenueBase Database · checked Sep 29, 2026
3	Pivot-Gis Limited	Indirect evidence	Lagos, NigeriaHQ checked Sep 29, 2026	201-500	264 contacts →
	Indirect evidence “PIVOT-GIS is a leading Nigerian Engineering, Procurement, Construction, Operations & Maintenance (EPCOM) company serving the oil, gas, and energy sectors since 2004.” Source: RevenueBase Database · checked Sep 29, 2026
4	LEE Engineering And Construction Company LTD	Indirect evidence	Ikoyi, NigeriaHQ checked Sep 29, 2026	501-1,000	114 contacts →
	Indirect evidence “Lee Engineering and Construction Co.” Source: RevenueBase Database · checked Sep 29, 2026
5	Aviam Offshore Engineering Company Limited	Indirect evidence	Lagos, NigeriaHQ checked Sep 29, 2026	201-500	73 contacts →
	Indirect evidence “AOECL provides Drilling & Well completion, Manpower, Procurement, Dredging, Inspection, and EPCI services (Engineering, Procurement, Technical Consultancy, Facility Maintenance…” Source: RevenueBase Database · checked Sep 29, 2026
6	Elper Oilfield Engineering	Indirect evidence	Lagos, NigeriaHQ checked Sep 29, 2026	501-1,000	70 contacts →
	Indirect 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 29, 2026
7	Homeland Integrated Offshore Services Limited	Partial evidence	Lagos, NigeriaHQ checked Sep 29, 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 29, 2026
8	Deltatek Offshore Limited	Partial evidence	Lagos, NigeriaHQ checked Sep 29, 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 29, 2026
9	Nigerstar7 Limited	Indirect evidence	Lagos, NigeriaHQ checked Sep 29, 2026	51-200	48 contacts →
	Indirect evidence “With headquarters in Lagos, Nigeria, NigerStar7 is a company wholly owned by Subsea7.” Source: RevenueBase Database · checked Sep 29, 2026
10	Melcurt Limited	Indirect evidence	Osubi-warri, NigeriaHQ checked Sep 29, 2026	201-500	45 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 29, 2026
11	True-Blue Energy Services Limited	Indirect evidence	Port Harcourt, NigeriaHQ checked Sep 29, 2026	51-200	40 contacts →
	Indirect 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 29, 2026
12	Alphaden Energy & Oilfield Limited	Indirect evidence	Victoria Island, NigeriaHQ checked Sep 29, 2026	51-200	35 contacts →
	Indirect evidence “The ‘ALPHA’S DEN’ is a hub of professional and well experienced Alpha’s, championing their fields while collectively making up a provider of fit-for-purpose services to clients…” Source: RevenueBase Database · checked Sep 29, 2026
13	Deepwater Engineering Limited DEL	Indirect evidence	Warri, NigeriaHQ checked Sep 29, 2026	11-50	29 contacts →
	Indirect 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 29, 2026
14	Gmunu Limited	Indirect evidence	Lekki Phase 1, NigeriaHQ checked Sep 29, 2026	51-200	27 contacts →
	Indirect evidence “GMUNU is a full-service Engineering Procurement and Construction Company.” Source: RevenueBase Database · checked Sep 29, 2026
15	Bicens Resources Limited	Indirect evidence	Warri, NigeriaHQ checked Sep 29, 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 29, 2026
16	Quest OIL And Engineering Services Limited	Indirect evidence	Lagos, NigeriaHQ checked Sep 29, 2026	11-50	21 contacts →
	Indirect 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 29, 2026
17	Seflam SGL	Indirect evidence	Victoria Island, NigeriaHQ checked Sep 29, 2026	201-500	16 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 29, 2026
18	Doxa Int'l Engineering Services LTD	Indirect evidence	Port Harcourt, NigeriaHQ checked Sep 29, 2026	11-50	13 contacts →
	Indirect 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 29, 2026
19	Epic Atlantic Limited	Indirect evidence	Port Harcourt, NigeriaHQ checked Sep 29, 2026	11-50	12 contacts →
	Indirect 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 29, 2026
20	Offshore Dimensions Limited	Indirect evidence	Lagos, NigeriaHQ checked Sep 29, 2026	11-50	11 contacts →
	Indirect 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 29, 2026
21	Selex Engineering & Construction Nigeria Limited	Partial evidence	Lekki Phase 1, NigeriaHQ checked Sep 29, 2026	11-50	10 contacts →
	Partial evidence “Selex Engineering & Construction Company Limited is an indigenous engineering company delivering integrated Engineering, Procurement, Fabrication, Construction, Installation…” Source: RevenueBase Database · checked Sep 29, 2026
22	Derotech Offshore Services Limited	Indirect evidence	Lekki, NigeriaHQ checked Sep 29, 2026	51-200	8 contacts →
	Indirect evidence “Derotech Offshore Services Limited is a preferred local offshore drilling company in Nigeria with technical support and ultramodern equipment from Pacific Drilling to respond to…” Source: RevenueBase Database · checked Sep 29, 2026
23	Mavi Energy Development Company Limited	Indirect evidence	Lekki, NigeriaHQ checked Sep 29, 2026	11-50	7 contacts →
	Indirect evidence “Mavi Energy Development Company Limited (MEDCOL) is a leading provider of comprehensive solutions for the upstream oil and gas sector.” Source: RevenueBase Database · checked Sep 29, 2026
24	Zeconia	Indirect evidence	Victoria Island, NigeriaHQ checked Sep 29, 2026	11-50	6 contacts →
	Indirect evidence “Zeconia GIL is a world class servicing company that provides total Offshore and Onshore solutions across the entire Oil & Gas Industry.” Source: RevenueBase Database · checked Sep 29, 2026
25	Jc'kanz Integrated Services Limited	Partial evidence	Victoria Island, NigeriaHQ checked Sep 29, 2026	11-50	6 contacts →
	Partial evidence “Your one-stop shop for Engineering, Procurement, Construction, Installation & Commissioning (EPCIC)\| Facility O&M \| Wellhead Installation & Maintenance \| Automated Tank Cleaning \|…” Source: RevenueBase Database · checked Sep 29, 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: platform topsides installation 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 platform topsides installation companies.
Partial evidence: Its own public description names part of platform topsides installation companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name platform topsides installation 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 131 platform topsides installation companies based in Nigeria

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Platform topsides installation companies based in Nigeria at a glance

As of Sep 29, 2026

11.6%Verified-email coverage

22.0Average contacts per company

11-50Median size (employees)

31.3%Largest-city concentration · Port Harcourt

Sep 29, 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 worldwide rather than for Nigeria, so it is reported there. Company counts and contact totals on this page are exact for Nigeria, over 131 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 platform topsides installation 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 Nigeria whose own description of what they do matches “platform topsides installation 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 platform topsides installation 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 platform topsides installation companies, 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, 334 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 29, 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 platform topsides installation 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 platform topsides installation companies are there based in Nigeria?

RevenueBase identified 131 platform topsides installation companies 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?

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

Which city has the most platform topsides installation companies?

Port Harcourt leads with 41 headquartered companies, followed by Lagos (31) and Lagos State (10).

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 334 verified decision-maker contacts tracked across these 131 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 29, 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.