Company lists · Data refreshed September 2026

Top 25 Refinery engineering firms based in Nigeria

Name: Refinery 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 503 companies tracked

RevenueBase identified 503 refinery engineering firms headquartered in Nigeria as of September 2026 and tracks 6,334 professional contacts across them, including 815 with verified work emails. Lagos is the largest hub.

This list covers refinery 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

503Companies

6,334Contacts tracked

815Verified emails

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The 25 largest refinery engineering firms based in Nigeria

Ranked by team size

Top 25 of 503 refinery 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 refinery 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	Aveon Offshore Limited	Partial evidence	Port Harcourt, NigeriaHQ checked Sep 17, 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 17, 2026
2	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
3	Pivot-Gis Limited	Partial evidence	Lagos, NigeriaHQ checked Sep 17, 2026	201-500	264 contacts →
	Partial 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 17, 2026
4	Mar&mor Engineering Services LTD	Indirect evidence	Abuja, NigeriaHQ checked Sep 17, 2026	201-500	224 contacts →
	Indirect evidence “With an eye for customer Satisfaction, we uphold a watch word to ".do it well." in any project we work on.” Source: RevenueBase Database · checked Sep 17, 2026
5	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
6	LEE Engineering And Construction Company LTD	Partial evidence	Ikoyi, NigeriaHQ checked Sep 17, 2026	501-1,000	114 contacts →
	Partial evidence “Lee Engineering and Construction Co.” Source: RevenueBase Database · checked Sep 17, 2026
7	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
8	DBN Energies	Partial evidence	Lagos, NigeriaHQ checked Sep 17, 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 17, 2026
9	PE Energy LTD	Partial evidence	Port Harcourt, NigeriaHQ checked Sep 17, 2026	51-200	92 contacts →
	Partial evidence “PE Energy is an Engineering Design, Procurement/Supply Chain, Integration, Installation and Maintenance of process facility Partner.” Source: RevenueBase Database · checked Sep 17, 2026
10	Rosetti Pivot LTD	Partial evidence	Lagos, NigeriaHQ checked Sep 17, 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 17, 2026
11	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
12	Crestech Engineering Limited, Lagos - Nigeria	Partial evidence	Lagos, NigeriaHQ checked Sep 17, 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 17, 2026
13	Thompson & Grace Investments Limited	Partial evidence	Port-harcourt, NigeriaHQ checked Sep 17, 2026	201-500	67 contacts →
	Partial evidence “Thompson & Grace Investment Limited (TGIL) an Engineering/ Oilfield Service company in Nigeria provides services to the Engineering Sector/Oil and Gas industry.” Source: RevenueBase Database · checked Sep 17, 2026
14	Point Engineering Limited	Partial evidence	Port Harcourt, NigeriaHQ checked Sep 17, 2026	51-200	65 contacts →
	Partial evidence “POINT ENGINEERING was established in 1995, started business in 1997 and active operations in January with a dedicated team of mechanical, process, civil/structural…” Source: RevenueBase Database · checked Sep 17, 2026
15	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
16	Weltek Limited	Partial evidence	Port Harcourt, NigeriaHQ checked Sep 17, 2026	51-200	55 contacts →
	Partial 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 17, 2026
17	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
18	Design Union	Indirect evidence	Lagos, NigeriaHQ checked Sep 17, 2026	51-200	53 contacts →
	Indirect evidence “Design Union is involved in various sectors, including infrastructure, real estate, educational institutions, corporate buildings, oil and gas, and residential.” Source: RevenueBase Database · checked Sep 17, 2026
19	Deltatek Offshore Limited	Partial evidence	Lagos, NigeriaHQ checked Sep 17, 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 17, 2026
20	Black Diamond Engineering LTD	Partial evidence	Lagos, NigeriaHQ checked Sep 17, 2026	51-200	42 contacts →
	Partial evidence “We are an engineering firm consulting with a broad spectrum of engineering services from visioning and strategy to detailed designed, from implementation and capacity building to…” Source: RevenueBase Database · checked Sep 17, 2026
21	Andster Engineering	Partial evidence	Lagos, NigeriaHQ checked Sep 17, 2026	11-50	38 contacts →
	Partial evidence “Andster Engineering provide multi-discipline engineering, technical services to industrial clients in Nigeria Oil & Gas Sector, Power & Energy Sector, Manufacturing & Production…” Source: RevenueBase Database · checked Sep 17, 2026
22	Emobella Engineering Nigeria Limited	Partial evidence	Ikeja, NigeriaHQ checked Sep 17, 2026	11-50	38 contacts →
	Partial evidence “Emobella Engineering Nigeria Limited is an indigenous engineering support service company incorporated in 2015 under the laws of the Federal Republic of Nigeria, A registered…” Source: RevenueBase Database · checked Sep 17, 2026
23	Alphaden Energy & Oilfield Limited	Indirect evidence	Victoria Island, NigeriaHQ checked Sep 17, 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 17, 2026
24	Tomsey Engineering & Services International LTD	Partial evidence	Ikeja, NigeriaHQ checked Sep 17, 2026	11-50	33 contacts →
	Partial evidence “TOMSEY Engineering & Services International Ltd is a trusted provider of Engineering, Procurement, and Construction (EPC) services to Nigeria’s Oil & Gas, Power, Petrochemical…” Source: RevenueBase Database · checked Sep 17, 2026
25	Nubian Nigeria Limited	Indirect evidence	Lagos, NigeriaHQ checked Sep 17, 2026	51-200	30 contacts →
	Indirect evidence “NUBIAN NIGERIA LIMITED is made up of five (5) main professional segments established to play competitively in the Nigeria oil and gas 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: refinery 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 refinery engineering firms.
Partial evidence: Its own public description names part of refinery engineering firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name refinery 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 503 refinery engineering firms based in Nigeria

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Refinery engineering firms based in Nigeria at a glance

As of Sep 17, 2026

12.9%Verified-email coverage

12.6Average contacts per company

11-50Median size (employees)

22.7%Largest-city concentration · Lagos

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

103

11-50

235

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 503 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 refinery 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 “refinery 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 refinery 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 refinery 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, 815 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.

Refinery engineering firms by metro

Refinery engineering firms in Lagos114
Refinery engineering firms in Port Harcourt89
Refinery engineering firms in Lagos State37

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 refinery 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 refinery engineering firms are there based in Nigeria?

RevenueBase identified 503 refinery 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?

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

Which city has the most refinery engineering firms?

Lagos leads with 114 headquartered companies, followed by Port Harcourt (89) and Lagos State (37).

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 815 verified decision-maker contacts tracked across these 503 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.