Company lists · Data refreshed September 2026

Top 25 Marine and subsea consulting firms based in South Africa

Name: Marine and subsea consulting firms based in South Africa
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 214 companies tracked

RevenueBase identified 214 marine and subsea consulting firms headquartered in South Africa as of September 2026 and tracks 3,630 professional contacts across them, including 1,457 with verified work emails. Cape Town is the largest hub.

This list covers marine and subsea consulting firms headquartered in South Africa, 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 28, 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 28, 2026 86% judged on-target in blind review

214Companies

3,630Contacts tracked

1,457Verified emails

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The 25 largest marine and subsea consulting firms based in South Africa

Ranked by team size

Top 25 of 214 marine and subsea consulting firms based in South Africa, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to marine and subsea consulting 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	WSP In Africa	Indirect evidence	Johannesburg, South AfricaHQ checked Sep 28, 2026	501-1,000	635 contacts →
	Indirect evidence “We are one of the world’s leading professional services firms, uniting our engineering, advisory and science-based expertise to shape communities to advance humanity.” Source: RevenueBase Database · checked Sep 28, 2026
2	Megchem	Partial evidence	Secunda, South AfricaHQ checked Sep 28, 2026	201-500	468 contacts →
	Partial evidence “MegChem (Pty) Ltd is a multi-disciplinary engineering company based in Secunda, South Africa, providing engineering consulting, procurement, and project management services to…” Source: RevenueBase Database · checked Sep 28, 2026
3	Jones & Wagener PTY LTD	Partial evidence	Johannesburg, South AfricaHQ checked Sep 28, 2026	51-200	228 contacts →
	Partial evidence “Jones & Wagener is a specialist firm of consulting engineers and scientists based in South Africa.” Source: RevenueBase Database · checked Sep 28, 2026
4	Knight Piesold Southern Africa	Partial evidence	Sandton, South AfricaHQ checked Sep 28, 2026	201-500	193 contacts →
	Partial evidence “Knight Piésold is a global consulting firm that provides specialised services to the mining, power, water resources and infrastructure industries.” Source: RevenueBase Database · checked Sep 28, 2026
5	Global Riser	Partial evidence	Cape Town, South AfricaHQ checked Sep 28, 2026	51-200	169 contacts →
	Partial evidence “Global Riser specializes in the maintenance, inspection and re-manufacture of marine drilling riser.” Source: RevenueBase Database · checked Sep 28, 2026
6	Axess Africa	Partial evidence	Cape Town, South AfricaHQ checked Sep 28, 2026	51-200	144 contacts →
	Partial evidence “Axess Group creates world-class sustainable solutions for leading players in the oil and gas, wind energy, marine, and infrastructure industries worldwide.” Source: RevenueBase Database · checked Sep 28, 2026
7	OSC Marine Group	Indirect evidence	Cape Town, South AfricaHQ checked Sep 28, 2026	51-200	104 contacts →
	Indirect evidence “OSC Group – a forging of underwater innovation and engineering expertise.” Source: RevenueBase Database · checked Sep 28, 2026
8	Semane Engineering Solutions PTY LTD	Partial evidence	Johannesburg, South AfricaHQ checked Sep 28, 2026	501-1,000	71 contacts →
	Partial evidence “Semane Engineering Solutions (Pty) Ltd is an independent South African multi-disciplinary consulting company that provides project management and engineering solutions in…” Source: RevenueBase Database · checked Sep 28, 2026
9	Lukhozi Consulting Engineers PTY LTD	Partial evidence	East London, South AfricaHQ checked Sep 28, 2026	51-200	69 contacts →
	Partial evidence “Lukhozi Consulting Engineers (Pty) Ltd is a Level 1 B-BBEE contributor and a leading multi-disciplinary professional engineering consultancy that offers a professional service…” Source: RevenueBase Database · checked Sep 28, 2026
10	ECO Elementum	Indirect evidence	City Of Tshwane, South AfricaHQ checked Sep 28, 2026	51-200	68 contacts →
	Indirect evidence “Established in 2013, Eco Elementum is a leading environmental and engineering consultancy.” Source: RevenueBase Database · checked Sep 28, 2026
11	VGI Consulting	Partial evidence	Centurion, South AfricaHQ checked Sep 28, 2026	11-50	66 contacts →
	Partial evidence “Based in South Africa, VGI Consulting PTY LTD is a leading multidisciplinary consulting engineering firm with 50 years experience, specializing in the Engineering, Procurement and…” Source: RevenueBase Database · checked Sep 28, 2026
12	GCS Water & Environmental Consultants PTY LTD	Indirect evidence	Rivonia, South AfricaHQ checked Sep 28, 2026	11-50	63 contacts →
	Indirect evidence “Established in 1987, GCS (Pty) Ltd is an independent consultancy offering a range of professional services within the fields of water, environmental and earth sciences.” Source: RevenueBase Database · checked Sep 28, 2026
13	Ingerop South Africa	Partial evidence	Johannesburg, South AfricaHQ checked Sep 28, 2026	51-200	57 contacts →
	Partial evidence “Ingerop South Africa is a multidisciplinary consulting engineering and project management company which was established in 1957.” Source: RevenueBase Database · checked Sep 28, 2026
14	AM Consulting Engineers PTY LTD	Partial evidence	Midrand, South AfricaHQ checked Sep 28, 2026	201-500	56 contacts →
	Partial evidence “AM Consulting Engineers (Pty) Ltd (AMCE) provides professional engineering and consulting services to the public and private infrastructure sector.” Source: RevenueBase Database · checked Sep 28, 2026
15	Just Engineering PTY LTD	Partial evidence	Cape Town, South AfricaHQ checked Sep 28, 2026	201-500	52 contacts →
	Partial evidence “About Us At Just Engineering, we specialize in delivering top-tier engineering solutions across the marine, mining, and structural sectors.” Source: RevenueBase Database · checked Sep 28, 2026
16	Cinco Engineering PTY LTD	Indirect evidence	Cape Town, South AfricaHQ checked Sep 28, 2026	11-50	49 contacts →
	Indirect evidence “As an owner-managed entity, Cinco Engineering offers a full scope of engineering services that draws on the strength of its shareholding companies.” Source: RevenueBase Database · checked Sep 28, 2026
17	Singo Consulting	Partial evidence	Emalahleni, South AfricaHQ checked Sep 28, 2026	51-200	44 contacts →
	Partial evidence “Singo Consulting (Pty) Ltd is a private independent research consultancy and advisory company based in eMalahleni (Witbank), holding no equity in any project and is owned by the…” Source: RevenueBase Database · checked Sep 28, 2026
18	Franki Africa PTY LTD	Indirect evidence	Ottery, South AfricaHQ checked Sep 28, 2026	51-200	37 contacts →
	Indirect evidence “Franki is the oldest and most established specialist geotechnical contractor in Sub-Saharan Africa.” Source: RevenueBase Database · checked Sep 28, 2026
19	Allweld Marine And Industrial	Partial evidence	Cape Town, South AfricaHQ checked Sep 28, 2026	51-200	33 contacts →
	Partial evidence “Allweld, a Cape Town-based marine and industrial engineering company, has been servicing the Southern African market for over fifty years.” Source: RevenueBase Database · checked Sep 28, 2026
20	Kimopax Group	Indirect evidence	Midrand, South AfricaHQ checked Sep 28, 2026	11-50	31 contacts →
	Indirect evidence “Kimopax is a company rendering specialized services in selected earth and environmental sciences, engineering disciplines and related project management functions.” Source: RevenueBase Database · checked Sep 28, 2026
21	Project Management International	Partial evidence	South AfricaHQ checked Sep 28, 2026	11-50	30 contacts →
	Partial evidence “Project Management International (PMI) is a dynamic project management company specialising in tailor-made Marine Construction, Engineering Services and Survey & Site…” Source: RevenueBase Database · checked Sep 28, 2026
22	Nadeson Consulting Services	Partial evidence	Cape Town, South AfricaHQ checked Sep 28, 2026	11-50	18 contacts →
	Partial evidence “Nadeson Consulting Services is a multi-disciplinary and advisory engineering consultancy with its headquarters in Cape Town, South Africa.” Source: RevenueBase Database · checked Sep 28, 2026
23	Optimult	Partial evidence	Johannesburg, South AfricaHQ checked Sep 28, 2026	11-50	18 contacts →
	Partial evidence “Optimult provides Consulting, EPC (Engineering, Procurement, Construction) and EPCM (Engineering, Procurement and Construction Management) services in a comprehensive range of…” Source: RevenueBase Database · checked Sep 28, 2026
24	Et-Global	Indirect evidence	Cape Town, South AfricaHQ checked Sep 28, 2026	11-50	15 contacts →
	Indirect evidence “ET-Global is a specialised engineering technical services company servicing local and international mining and offshore industries.” Source: RevenueBase Database · checked Sep 28, 2026
25	SEA Technology Services	Indirect evidence	Cape Town, South AfricaHQ checked Sep 28, 2026	1-10	14 contacts →
	Indirect evidence “Sea Technology Services is a Cape Town based Oceanographic Engineering and Services company, established in 1995.” Source: RevenueBase Database · checked Sep 28, 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 and subsea consulting 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 marine and subsea consulting firms.
Partial evidence: Its own public description names part of marine and subsea consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name marine and subsea consulting 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 214 marine and subsea consulting firms based in South Africa

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Marine and subsea consulting firms based in South Africa at a glance

As of Sep 28, 2026

40.1%Verified-email coverage

17.0Average contacts per company

1-10Median size (employees)

24.8%Largest-city concentration · Cape Town

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

112

11-50

51-200

201-500

501-1,000

Email recency for this list is measured worldwide rather than for South Africa, so it is reported there. Company counts and contact totals on this page are exact for South Africa, over 214 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 and subsea consulting 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 South Africa whose own description of what they do matches “marine and subsea consulting 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 marine and subsea consulting 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 marine and subsea consulting firms, and records with no verified work email. Companies headquartered outside South Africa 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, 1,457 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 28, 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 and subsea consulting firms by metro

Marine and subsea consulting firms in Cape Town53

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 and subsea consulting 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 marine and subsea consulting firms are there based in South Africa?

RevenueBase identified 214 marine and subsea consulting firms headquartered in South Africa 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?

WSP In Africa, headquartered in Johannesburg, tops this list with the largest team on record.

Which city has the most marine and subsea consulting firms?

Cape Town leads with 53 headquartered companies, followed by Johannesburg (22) and Durban (14).

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 1,457 verified decision-maker contacts tracked across these 214 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 28, 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.