Company lists · Data refreshed September 2026

Top 25 Oil refinery construction companies based in Nigeria

Name: Oil refinery construction companies based in Nigeria
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 15, 2026 377 companies tracked

RevenueBase identified 377 oil refinery construction companies headquartered in Nigeria as of September 2026 and tracks 6,827 professional contacts across them, including 913 with verified work emails. Port Harcourt is the largest hub.

This list covers oil refinery construction 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 15, 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 15, 2026 86% judged on-target in blind review

377Companies

6,827Contacts tracked

913Verified emails

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The 25 largest oil refinery construction companies based in Nigeria

Ranked by team size

Top 25 of 377 oil refinery construction companies based in Nigeria, ranked by team size, largest first. Data refreshed Sep 15, 2026. RevenueBase Smart Search rates how each company's information relates to oil refinery construction 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	Nestoil Limited	Strong evidence	Victoria Island, NigeriaHQ checked Sep 15, 2026	1,001-5,000	700 contacts →
	Strong 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 15, 2026
2	Alcon Nigeria LTD	Partial evidence	Port Harcourt, NigeriaHQ checked Sep 15, 2026	1,001-5,000	417 contacts →
	Partial 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 15, 2026
3	Cakasa Nigeria Company Limited	Strong evidence	Lagos, NigeriaHQ checked Sep 15, 2026	201-500	340 contacts →
	Strong evidence “CAKASA was incorporated in 1974 to provide Engineering, Procurement & Construction (EPC) Services to the Nigerian Oil and Gas and Industrial Infrastructural clients: A trailblazer…” Source: RevenueBase Database · checked Sep 15, 2026
4	Dover Engineering Limited	Indirect evidence	Port Harcourt, NigeriaHQ checked Sep 15, 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 15, 2026
5	Pivot-Gis Limited	Strong evidence	Lagos, NigeriaHQ checked Sep 15, 2026	201-500	264 contacts →
	Strong 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 15, 2026
6	Ariosh	Strong evidence	Lagos, NigeriaHQ checked Sep 15, 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 15, 2026
7	Seflam SGL	Strong evidence	Victoria Island, NigeriaHQ checked Sep 15, 2026	201-500	220 contacts →
	Strong evidence “A foremost provider of Engineering, Procurement, Construction, & Installation Services to the Nigerian Oil and Gas Industry.” Source: RevenueBase Database · checked Sep 15, 2026
8	Makon Group	Strong evidence	Lekki, NigeriaHQ checked Sep 15, 2026	501-1,000	192 contacts →
	Strong evidence “Makon Group is an international organisation with its business interests spanning Engineering, Procurement, Construction, Operation and Maintenance (EPICOM) for Oil and Gas…” Source: RevenueBase Database · checked Sep 15, 2026
9	Kohasa Engineering Company Limited	Partial evidence	Port Harcourt, NigeriaHQ checked Sep 15, 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 15, 2026
10	Morpol Engineering Services	Indirect evidence	Victoria Island, NigeriaHQ checked Sep 15, 2026	501-1,000	127 contacts →
	Indirect evidence “Morpol Engineering Services Ltd.” Source: RevenueBase Database · checked Sep 15, 2026
11	LEE Engineering And Construction Company LTD	Partial evidence	Ikoyi, NigeriaHQ checked Sep 15, 2026	501-1,000	114 contacts →
	Partial evidence “Lee Engineering and Construction Co.” Source: RevenueBase Database · checked Sep 15, 2026
12	DBN Energies	Partial evidence	Lagos, NigeriaHQ checked Sep 15, 2026	201-500	104 contacts →
	Partial evidence “DBN’s core competencies include a vast range of engineering and construction capabilities that cater to the diverse needs of its projects and clients in Nigeria and globally.” Source: RevenueBase Database · checked Sep 15, 2026
13	Nivafer Engineering And Construction Limited	Strong evidence	Oke-shasha, NigeriaHQ checked Sep 15, 2026	201-500	94 contacts →
	Strong evidence “NIVAFER Engineering & Construction Limited is a steel fabrication and erection outfit offering unparalleled engineering & construction services to the Oil and Gas industry…” Source: RevenueBase Database · checked Sep 15, 2026
14	PE Energy LTD	Indirect evidence	Port Harcourt, NigeriaHQ checked Sep 15, 2026	51-200	92 contacts →
	Indirect evidence “PE Energy is an Engineering Design, Procurement/Supply Chain, Integration, Installation and Maintenance of process facility Partner.” Source: RevenueBase Database · checked Sep 15, 2026
15	Rosetti Pivot LTD	Strong evidence	Lagos, NigeriaHQ checked Sep 15, 2026	51-200	84 contacts →
	Strong 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 15, 2026
16	Elper Oilfield Engineering	Partial evidence	Lagos, NigeriaHQ checked Sep 15, 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 15, 2026
17	Crestech Engineering Limited, Lagos - Nigeria	Indirect evidence	Lagos, NigeriaHQ checked Sep 15, 2026	51-200	67 contacts →
	Indirect evidence “Crestech is an Engineering Design and Project Management Company with its head office in Victoria Island, Lagos, Nigeria.” Source: RevenueBase Database · checked Sep 15, 2026
18	Merald Group	Partial evidence	Victoria Island, NigeriaHQ checked Sep 15, 2026	201-500	62 contacts →
	Partial evidence “Merald Group is an Engineering and Construction Company specialised in Mechanical Works, Electrical Installations, HVAC Installations, Industrial Piping and Pipeline, Structural…” Source: RevenueBase Database · checked Sep 15, 2026
19	Bablink Resources Nigeria Limited	Strong evidence	Warri, NigeriaHQ checked Sep 15, 2026	51-200	62 contacts →
	Strong evidence “BABLINK RESOURCES NIGERIA LTD is a Nigerian owned EPCI Company poised to offer total Engineering and Construction solution to service demands of the Nation’s Oil, Gas and Energy…” Source: RevenueBase Database · checked Sep 15, 2026
20	Frazimex Engineering Limited	Indirect evidence	Port Harcourt, NigeriaHQ checked Sep 15, 2026	201-500	58 contacts →
	Indirect 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 15, 2026
21	Weltek Limited	Strong evidence	Port Harcourt, NigeriaHQ checked Sep 15, 2026	51-200	55 contacts →
	Strong evidence “WELTEK Limited is an engineering, procurement and construction company, incorporated in Nigeria in 1986, to provide specialized services to the Oil & Gas, Power Generation…” Source: RevenueBase Database · checked Sep 15, 2026
22	Bridgsite Nigeria Limited BNL	Partial evidence	Port Harcourt, NigeriaHQ checked Sep 15, 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 15, 2026
23	Northridge Engineering Limited	Strong evidence	Lagos, NigeriaHQ checked Sep 15, 2026	501-1,000	55 contacts →
	Strong evidence “Established in 2009, Northridge Engineering Limited is a construction company serving the private and public sector as well as the oil & gas industry in Nigeria (i.e, NOCs and…” Source: RevenueBase Database · checked Sep 15, 2026
24	Homeland Integrated Offshore Services Limited	Partial evidence	Lagos, NigeriaHQ checked Sep 15, 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 15, 2026
25	Deltatek Offshore Limited	Strong evidence	Lagos, NigeriaHQ checked Sep 15, 2026	201-500	48 contacts →
	Strong 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 15, 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: oil refinery construction 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 oil refinery construction companies.
Partial evidence: Its own public description names part of oil refinery construction companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name oil refinery construction 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 377 oil refinery construction companies based in Nigeria

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Oil refinery construction companies based in Nigeria at a glance

As of Sep 15, 2026

13.4%Verified-email coverage

18.1Average contacts per company

11-50Median size (employees)

20.4%Largest-city concentration · Port Harcourt

Sep 15, 2026Page data refreshed

Companies by employee count

1-10

11-50

158

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 377 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 oil refinery construction 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 “oil refinery construction 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 oil refinery construction 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 oil refinery construction 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, 913 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 15, 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.

Oil refinery construction companies by metro

Oil refinery construction companies in Port Harcourt77
Oil refinery construction companies in Lagos73
Oil refinery construction companies in Lagos State32

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 oil refinery construction 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 oil refinery construction companies are there based in Nigeria?

RevenueBase identified 377 oil refinery construction 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?

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

Which city has the most oil refinery construction companies?

Port Harcourt leads with 77 headquartered companies, followed by Lagos (73) and Lagos State (32).

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 913 verified decision-maker contacts tracked across these 377 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 15, 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.