Company lists · Data refreshed September 2026

Top 25 Petrochemical plant construction firms based in Nigeria

Name: Petrochemical plant construction 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 150 companies tracked

RevenueBase identified 150 petrochemical plant construction firms headquartered in Nigeria as of September 2026 and tracks 2,110 professional contacts across them, including 355 with verified work emails. Lagos is the largest hub.

This list covers petrochemical plant construction 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

150Companies

2,110Contacts tracked

355Verified emails

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The 25 largest petrochemical plant construction firms based in Nigeria

Ranked by team size

Top 25 of 150 petrochemical plant construction 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 petrochemical plant construction 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	Indirect evidence	Port Harcourt, NigeriaHQ checked Sep 17, 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 17, 2026
2	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
3	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
4	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
5	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
6	Homeland Integrated Offshore Services Limited	Partial evidence	Lagos, NigeriaHQ checked Sep 17, 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 17, 2026
7	Tomsey Engineering & Services International LTD	Strong evidence	Ikeja, NigeriaHQ checked Sep 17, 2026	11-50	33 contacts →
	Strong 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
8	Morpol Engineering Services Limited	Indirect evidence	Victoria Island, NigeriaHQ checked Sep 17, 2026	201-500	31 contacts →
	Indirect evidence “Morpol Engineering Services Ltd.” Source: RevenueBase Database · checked Sep 17, 2026
9	Gmunu Limited	Partial evidence	Lekki Phase 1, NigeriaHQ checked Sep 17, 2026	51-200	27 contacts →
	Partial evidence “GMUNU is a full-service Engineering Procurement and Construction Company.” Source: RevenueBase Database · checked Sep 17, 2026
10	Supasteel Limited	Partial evidence	Kaduna, NigeriaHQ checked Sep 17, 2026	201-500	25 contacts →
	Partial evidence “Supasteel Limited is a wholly indigenously owned Engineering Procurement and construction Company carrying out Fabrication, Installation, Repair of Static and Rotating Equipment…” Source: RevenueBase Database · checked Sep 17, 2026
11	Cozym Limited	Indirect evidence	Lekki Phase 1, NigeriaHQ checked Sep 17, 2026	11-50	20 contacts →
	Indirect evidence “Cozym Limited is a family of Engineers and Consultants with core competencies in the areas of Feasibility Studies, Front End and Detailed Engineering Designs, Materials…” Source: RevenueBase Database · checked Sep 17, 2026
12	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
13	Piecurve Energy Projects Limited	Indirect evidence	Lekki, NigeriaHQ checked Sep 17, 2026	11-50	15 contacts →
	Indirect evidence “PIECURVE was founded by a team of leading consultants in engineering and project management with years of experience in Africa (Nigeria, Equatorial Guinea, Cameroon, Angola) and…” Source: RevenueBase Database · checked Sep 17, 2026
14	Indexpro Int'l Service LTD	Indirect evidence	Port Harcourt, NigeriaHQ checked Sep 17, 2026	51-200	14 contacts →
	Indirect evidence “Looking for engineering solutions that deliver lasting impact?” Source: RevenueBase Database · checked Sep 17, 2026
15	Gasfleet Engineering Limited	Indirect evidence	Lasu Road, NigeriaHQ checked Sep 17, 2026	51-200	12 contacts →
	Indirect evidence “GASFLEET ENGINEERING LTD (GEL) was founded in 2016 to provide EPCM services for the energy sector.” Source: RevenueBase Database · checked Sep 17, 2026
16	Desicongroup	Partial evidence	Victoria Island, NigeriaHQ checked Sep 17, 2026	201-500	10 contacts →
	Partial evidence “For over 40 years, DESICON Engineering Limited has been an indigenous industry leader providing innovative Engineering, Procurement and Construction (EPC) solutions to our clients.” Source: RevenueBase Database · checked Sep 17, 2026
17	Selex Engineering & Construction Nigeria Limited	Partial evidence	Lekki Phase 1, NigeriaHQ checked Sep 17, 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 17, 2026
18	Mavi Energy Development Company Limited	Indirect evidence	Lekki, NigeriaHQ checked Sep 17, 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 17, 2026
19	Structbuild Construction Limited	Partial evidence	Lagos, NigeriaHQ checked Sep 17, 2026	11-50	7 contacts →
	Partial evidence “StructBuild Construction Limited is a Nigerian-owned civil engineering and construction company established in 2017 to deliver disciplined, safety-driven construction services to…” Source: RevenueBase Database · checked Sep 17, 2026
20	Offshore Dimensions LTD	Partial evidence	Ibeju-lekki, NigeriaHQ checked Sep 17, 2026	11-50	6 contacts →
	Partial evidence “Offshore Dimensions Limited: Leading Engineering, Procurement and Construction Management Company in Nigeria Servicing the Energy, Oil and Gas We are a renowned engineering…” Source: RevenueBase Database · checked Sep 17, 2026
21	Jc'kanz Integrated Services Limited	Partial evidence	Victoria Island, NigeriaHQ checked Sep 17, 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 17, 2026
22	Vhelbherg	Indirect evidence	Port Harcourt, NigeriaHQ checked Sep 17, 2026	1-10	6 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 17, 2026
23	MJD Oilfield Services Limited	Indirect evidence	Port Harcourt, NigeriaHQ checked Sep 17, 2026	51-200	5 contacts →
	Indirect evidence “With nearly a decade of operations, MJD Oilfield Services Limited has become a unique provider of solutions to the Nigerian oil and gas industry with dynamic expertise in…” Source: RevenueBase Database · checked Sep 17, 2026
24	Sunup Energy	Partial evidence	Port Harcourt, NigeriaHQ checked Sep 17, 2026	51-200	5 contacts →
	Partial evidence “Engineering, Procurement, Construction, Installation and Commissioning” Source: RevenueBase Database · checked Sep 17, 2026
25	Bauweise Services Limited	Partial evidence	Ifako, NigeriaHQ checked Sep 17, 2026	1-10	4 contacts →
	Partial evidence “Bauweise Services Limited is an engineering, construction, and project management company based in Lagos, Nigeria.” 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: petrochemical plant construction 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 petrochemical plant construction firms.
Partial evidence: Its own public description names part of petrochemical plant construction firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name petrochemical plant construction 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 150 petrochemical plant construction firms based in Nigeria

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Petrochemical plant construction firms based in Nigeria at a glance

As of Sep 17, 2026

16.8%Verified-email coverage

14.1Average contacts per company

11-50Median size (employees)

22.7%Largest-city concentration · Lagos

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

11-50

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 150 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 petrochemical plant construction 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 “petrochemical plant construction 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 petrochemical plant construction 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 petrochemical plant construction 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, 355 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.

Petrochemical plant construction firms by metro

Petrochemical plant construction firms in Lagos34
Petrochemical plant construction firms in Port Harcourt31

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 petrochemical plant construction 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 petrochemical plant construction firms are there based in Nigeria?

RevenueBase identified 150 petrochemical plant construction 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 petrochemical plant construction firms?

Lagos leads with 34 headquartered companies, followed by Port Harcourt (31) and Lagos State (12).

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 355 verified decision-maker contacts tracked across these 150 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.