Company lists · Data refreshed September 2026

Top 23 Marine environmental consultancies based in Nigeria

Name: Marine environmental consultancies based in Nigeria
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 14, 2026 174 companies tracked

RevenueBase identified 174 marine environmental consultancies headquartered in Nigeria as of September 2026 and tracks 1,750 professional contacts across them, including 206 with verified work emails. Lagos is the largest hub.

This list covers marine environmental consultancies 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 14, 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 14, 2026 86% judged on-target in blind review

174Companies

1,750Contacts tracked

206Verified emails

Explore this list → Free signup · no credit card · 500 free credits

The 23 largest marine environmental consultancies based in Nigeria

Ranked by team size

Top 23 of 174 marine environmental consultancies based in Nigeria, ranked by team size, largest first. Data refreshed Sep 14, 2026. RevenueBase Smart Search rates how each company's information relates to marine environmental consultancies: 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	Hydrodive Group	Partial evidence	Lagos, NigeriaHQ checked Sep 14, 2026	201-500	409 contacts →
	Partial evidence “HydroDive provides a broad range of Marine Vessels, Air, Mixed Gas and Saturation Diving, ROV, AUV and Survey Services primarily to the offshore & inshore Petroleum Industry of…” Source: RevenueBase Database · checked Sep 14, 2026
2	Nlng Shipping And Marine Services Limited	Indirect evidence	Port Harcourt, NigeriaHQ checked Sep 14, 2026	501-1,000	190 contacts →
	Indirect evidence “NSML was incorporated as a private limited liability company on October 9, 2008 and started operations in 2010 as a ship manning company.” Source: RevenueBase Database · checked Sep 14, 2026
3	Aviam Offshore Engineering Company Limited	Indirect evidence	Lagos, NigeriaHQ checked Sep 14, 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 14, 2026
4	Subsea100 Global	Indirect evidence	Port Harcourt, NigeriaHQ checked Sep 14, 2026	11-50	30 contacts →
	Indirect evidence “Overview Subsea100 Global(SHG), established in 2011, is a leading independent Offshore Services Contractor providing a range of Geophysical, Geotechnical and Subsea related…” Source: RevenueBase Database · checked Sep 14, 2026
5	Deepwater Engineering Limited DEL	Indirect evidence	Warri, NigeriaHQ checked Sep 14, 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 14, 2026
6	Eems Limited Engineering And Environmental Management Services Limited	Indirect evidence	Fct-abuja, NigeriaHQ checked Sep 14, 2026	11-50	21 contacts →
	Indirect evidence “ABOUT US: EEMS Limited is a multi-disciplinary consulting firm incorporated as a limited liability company under the Companies and Allied Matters Act 1990 in September 1997.” Source: RevenueBase Database · checked Sep 14, 2026
7	West African Fenders LTD	Strong evidence	Apapa, NigeriaHQ checked Sep 14, 2026	11-50	21 contacts →
	Strong evidence “West African Fenders is a world class marine Company with an aim to provide marine services to targeted business environments in Africa with the view of growing into regions in…” Source: RevenueBase Database · checked Sep 14, 2026
8	Glenstar Marine Limited	Partial evidence	Lekki Phase 1, NigeriaHQ checked Sep 14, 2026	11-50	20 contacts →
	Partial evidence “Glenstar Marine Limited is a fully indigenous West African Marine Logistics company incorporated with a mandate to promote international Maritime standards and practices in the…” Source: RevenueBase Database · checked Sep 14, 2026
9	XPO Marine Services Limited	Partial evidence	Victoria Island, NigeriaHQ checked Sep 14, 2026	11-50	18 contacts →
	Partial evidence “XPO Marine Services is an integrated provider of offshore marine support services to the oil and gas industry in West Africa.” Source: RevenueBase Database · checked Sep 14, 2026
10	Environquest Limited	Partial evidence	Lagos, NigeriaHQ checked Sep 14, 2026	11-50	18 contacts →
	Partial evidence “EnvironQuest provides integrated solutions for the management of environmental, natural resource, and socioeconomic issues for sustainable development.” Source: RevenueBase Database · checked Sep 14, 2026
11	Atlantic Fenders And Support Services	Indirect evidence	Lagos Island, NigeriaHQ checked Sep 14, 2026	51-200	18 contacts →
	Indirect evidence “Welcome to the AFSS business page.” Source: RevenueBase Database · checked Sep 14, 2026
12	Dexterpro Limited	Indirect evidence	Lekki Phase 1, NigeriaHQ checked Sep 14, 2026	11-50	16 contacts →
	Indirect evidence “Dexter Pro is a fast-growing, dynamic and pragmatic solutions-driven company.” Source: RevenueBase Database · checked Sep 14, 2026
13	Deep Water Consultancy & Engineering Services LTD	Indirect evidence	Lekki, NigeriaHQ checked Sep 14, 2026	11-50	15 contacts →
	Indirect evidence “DeepWater Consultancy & Engineering Services Limited is an Independent Oil and Gas Subsea technology, Pipeline management and Field development engineering consultancy company…” Source: RevenueBase Database · checked Sep 14, 2026
14	Afrikdelta Marine Limited Adml	Indirect evidence	Lagos, NigeriaHQ checked Sep 14, 2026	11-50	14 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 14, 2026
15	Somatrix Marine Limited	Partial evidence	Fct, NigeriaHQ checked Sep 14, 2026	11-50	13 contacts →
	Partial evidence “Somatrix Marine Limited is a Nigerian Company dully registered with the Corporate Affairs Commission in accordance with the laws of the Federal Government of Nigeria.” Source: RevenueBase Database · checked Sep 14, 2026
16	Tethys Plantgeria LTD	Indirect evidence	Port Harcourt, NigeriaHQ checked Sep 14, 2026	11-50	13 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 14, 2026
17	Apex Analytics Limited	Indirect evidence	Port Harcourt, NigeriaHQ checked Sep 14, 2026	1-10	12 contacts →
	Indirect evidence “Apex Analytics Limited is a 100% Nigerian Company, owned and managed by young Nigerian experienced professionals (with experience ranging from 6-15 years).” Source: RevenueBase Database · checked Sep 14, 2026
18	Kench Survey	Partial evidence	Warri, NigeriaHQ checked Sep 14, 2026	1-10	9 contacts →
	Partial evidence “Kench Survey Limited with over 25 years in Operation provides technical services and professional consulting in the area of land and marine surveying, mapping and land information…” Source: RevenueBase Database · checked Sep 14, 2026
19	Terra Aqua Environmental Consultancy Limited	Partial evidence	Ogun State, NigeriaHQ checked Sep 14, 2026	11-50	9 contacts →
	Partial evidence “Terra Aqua Environmental Consultancy Ltd is a foremost Nigerian Environmental Consultancy Firms providing a plethora of solutions in the “green business”.” Source: RevenueBase Database · checked Sep 14, 2026
20	Delta Systematics LTD	Partial evidence	Port Harcourt, NigeriaHQ checked Sep 14, 2026	11-50	8 contacts →
	Partial evidence “An Environmental Consulting firm with a wealth of experience in different environmental process projects; EIA, PIA, EER, We are also a leading establishment with expertise in GIS…” Source: RevenueBase Database · checked Sep 14, 2026
21	Greenstad Projects Limited	Partial evidence	Ibadan, NigeriaHQ checked Sep 14, 2026	1-10	6 contacts →
	Partial evidence “Greenstad Projects Limited is a leading environmental consulting, development advisory and training firm comprising of multidisciplinary team of experts with requisite project…” Source: RevenueBase Database · checked Sep 14, 2026
22	Avant-Garde Limited	Partial evidence	Lagos, NigeriaHQ checked Sep 14, 2026	11-50	5 contacts →
	Partial evidence “Avant-Garde Limited an Environmental One stop shop providing specialized environmental and sustainability management consultancy services to a wide range of clients across…” Source: RevenueBase Database · checked Sep 14, 2026
23	Olistair Integrated Services Limited	Indirect evidence	Ikeja, NigeriaHQ checked Sep 14, 2026	11-50	4 contacts →
	Indirect evidence “Olistair is a leading oil and gas servicing company with services that cater to the entire oil and gas value chain.” Source: RevenueBase Database · checked Sep 14, 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: marine environmental consultancies. 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 marine environmental consultancies.
Partial evidence: Its own public description names part of marine environmental consultancies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name marine environmental consultancies. 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 23 of 174 marine environmental consultancies based in Nigeria

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 206 reachable decision-makers.

Free signup · no credit card

View the full list →

Marine environmental consultancies based in Nigeria at a glance

As of Sep 14, 2026

11.8%Verified-email coverage

10.1Average contacts per company

11-50Median size (employees)

27.0%Largest-city concentration · Lagos

Sep 14, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

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 174 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 marine environmental consultancies, 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 “marine environmental consultancies”. 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 marine environmental consultancies), 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 marine environmental consultancies, 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, 206 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 14, 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.

Marine environmental consultancies by metro

Marine environmental consultancies in Lagos47
Marine environmental consultancies in Port Harcourt30

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 marine environmental consultancies, 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 marine environmental consultancies are there based in Nigeria?

RevenueBase identified 174 marine environmental consultancies 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?

Hydrodive Group, headquartered in Lagos, tops this list with the largest team on record.

Which city has the most marine environmental consultancies?

Lagos leads with 47 headquartered companies, followed by Port Harcourt (30) and Abuja (8).

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 206 verified decision-maker contacts tracked across these 174 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 14, 2026.

Ready to reach these companies? Verified emails and direct dials for all 174 marine environmental consultancies based in Nigeria. Start with a free account, no credit card.

Download this list →

Related lists

Marine environmental consultancies by geography

Browse the directory

Browse: Companies home · All Nigeria lists · All Marine environmental consultancies lists · New lists

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.