Company lists · Data refreshed September 2026

Top 25 Marine geotechnical firms based in South Africa

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

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 123 companies tracked

RevenueBase identified 123 marine geotechnical firms headquartered in South Africa as of September 2026 and tracks 945 professional contacts across them, including 217 with verified work emails. Cape Town is the largest hub.

This list covers marine geotechnical 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 20, 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 20, 2026 86% judged on-target in blind review

123Companies

945Contacts tracked

217Verified emails

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The 25 largest marine geotechnical firms based in South Africa

Ranked by team size

Top 25 of 123 marine geotechnical firms based in South Africa, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to marine geotechnical 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	Geogroup	Indirect evidence	Sunrella, South AfricaHQ checked Sep 20, 2026	201-500	68 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 20, 2026
2	Geosure PTY LTD	Partial evidence	Durban, South AfricaHQ checked Sep 20, 2026	51-200	57 contacts →
	Partial evidence “Since the company's inception in 1992, Geosure has established a formidable reputation in Southern African Geotechnics.” Source: RevenueBase Database · checked Sep 20, 2026
3	Just Engineering PTY LTD	Partial evidence	Cape Town, South AfricaHQ checked Sep 20, 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 20, 2026
4	Open House Management Solutions	Partial evidence	Potchefstroom, South AfricaHQ checked Sep 20, 2026	11-50	47 contacts →
	Partial evidence “Open House Management Solutions is a South-African based, Geotechnical Engineering and Seismological services provider.” Source: RevenueBase Database · checked Sep 20, 2026
5	Franki Africa PTY LTD	Partial evidence	Ottery, South AfricaHQ checked Sep 20, 2026	51-200	37 contacts →
	Partial evidence “Franki is the oldest and most established specialist geotechnical contractor in Sub-Saharan Africa.” Source: RevenueBase Database · checked Sep 20, 2026
6	Project Management International	Partial evidence	South AfricaHQ checked Sep 20, 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 20, 2026
7	Peragage	Partial evidence	City Of Tshwane, South AfricaHQ checked Sep 20, 2026	11-50	25 contacts →
	Partial evidence “PeraGage is a Leading, Trusted and the Preferred specialist firm of geo-consultants including hydrogeologists, geotechnical engineers and engineering geologists operating…” Source: RevenueBase Database · checked Sep 20, 2026
8	Rafuni PTY LTD	Partial evidence	Johannesburg, South AfricaHQ checked Sep 20, 2026	11-50	22 contacts →
	Partial evidence “Rafuni offers Geotechnical, Geological and Environmental Consulting Services.” Source: RevenueBase Database · checked Sep 20, 2026
9	PETEC	Partial evidence	Cape Town, South AfricaHQ checked Sep 20, 2026	51-200	19 contacts →
	Partial evidence “MARINE HYDRAULIC ENGINEERS SINCE 1988 As a trusted provider of engineering services and solutions, Petec Services has continuously evolved to meet the dynamic needs of the marine…” Source: RevenueBase Database · checked Sep 20, 2026
10	Et-Global	Indirect evidence	Cape Town, South AfricaHQ checked Sep 20, 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 20, 2026
11	SEA Technology Services	Indirect evidence	Cape Town, South AfricaHQ checked Sep 20, 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 20, 2026
12	Zolula	Partial evidence	Stellenbosch, South AfricaHQ checked Sep 20, 2026	51-200	14 contacts →
	Partial evidence “Zolula (Pty) Ltd is a proudly level 1 specialist geotechnical construction company focussed on building strong and meaningful partnerships.” Source: RevenueBase Database · checked Sep 20, 2026
13	Civilab PTY LTD	Indirect evidence	Johannesburg, South AfricaHQ checked Sep 20, 2026	51-200	13 contacts →
	Indirect evidence “Civilab is one of the most technically advanced civil and mining engineering laboratories in South Africa.” Source: RevenueBase Database · checked Sep 20, 2026
14	Fairbrother Geotechnical Engineering	Partial evidence	Cape Town, South AfricaHQ checked Sep 20, 2026	51-200	10 contacts →
	Partial evidence “Fairbrother Geotechnical Engineering is a leading South African geotechnical contractor delivering specialised ground engineering solutions to infrastructure, energy, commercial…” Source: RevenueBase Database · checked Sep 20, 2026
15	Groundwork Consulting	Partial evidence	Sandton, South AfricaHQ checked Sep 20, 2026	11-50	10 contacts →
	Partial evidence “Groundwork Consulting is a leading geotechnical consulting firm, harnessing cutting-edge technologies to provide innovative solutions for challenges in both the mining and civil…” Source: RevenueBase Database · checked Sep 20, 2026
16	Mega Pile	Partial evidence	Durban, South AfricaHQ checked Sep 20, 2026	51-200	10 contacts →
	Partial evidence “Mega Pile specialises in geotechnical investigations, piling and lateral support.” Source: RevenueBase Database · checked Sep 20, 2026
17	WML Coast	Indirect evidence	Stellenbosch, South AfricaHQ checked Sep 20, 2026	1-10	8 contacts →
	Indirect evidence “WML was established in Stellenbosch (SA) in 2005 and is affiliated to the WML Consulting Engineering Group in Namibia.” Source: RevenueBase Database · checked Sep 20, 2026
18	Aqua Earth	Indirect evidence	Johannesburg, South AfricaHQ checked Sep 20, 2026	11-50	8 contacts →
	Indirect evidence “Aqua Earth celebrates more than 20 years of operation and prides itself on having a dynamic team of specialists in Hydrogeology, also identified as Groundwater, as well as…” Source: RevenueBase Database · checked Sep 20, 2026
19	Davies Lynn & Partners PTY LTD	Partial evidence	Kloof, South AfricaHQ checked Sep 20, 2026	11-50	6 contacts →
	Partial evidence “Davies Lynn and Partners (Pty) Ltd is a Geotechnical Consulting and Engineering Geology company founded in 1981 and has been operational for 44 years.” Source: RevenueBase Database · checked Sep 20, 2026
20	BAV Consulting SA	Indirect evidence	Durban, South AfricaHQ checked Sep 20, 2026	1-10	6 contacts →
	Indirect evidence “We provide a reliable and efficient Geo-tech, Geo-hydrology, Survey, Civil Engineering and Project Management services to the engineering and sciences sectors for both private and…” Source: RevenueBase Database · checked Sep 20, 2026
21	Open Ground Resources	Indirect evidence	Pretoria, South AfricaHQ checked Sep 20, 2026	1-10	6 contacts →
	Indirect evidence “Open Ground Resources is an expert geophysical consultancy with more than 20 years of experience specializing in the provision and utilization of geophysical techniques such as…” Source: RevenueBase Database · checked Sep 20, 2026
22	JC Geotechnical Services PTY LTD	Partial evidence	Randburg, South AfricaHQ checked Sep 20, 2026	11-50	4 contacts →
	Partial evidence “Welcome to JCG – Your Trusted Geotechnical Solutions Partner Founded in 2005 as a passionate father-and-son venture, JCG has grown into a leading name in geotechnical solutions -…” Source: RevenueBase Database · checked Sep 20, 2026
23	Melis & DU Plessis Consulting Engineers	Partial evidence	Cape Town, South AfricaHQ checked Sep 20, 2026	1-10	4 contacts →
	Partial evidence “Melis & Du Plessis Consulting Engineers have been in existence for 40 years, providing specialist consultancy services in the fields of Geotechnical Engineering and Engineering…” Source: RevenueBase Database · checked Sep 20, 2026
24	KD Marine Design	Partial evidence	Cape Town, South AfricaHQ checked Sep 20, 2026	1-10	4 contacts →
	Partial evidence “KD Marine Design is a "full service" naval architecture and marine design consultancy based in Cape Town, South Africa.” Source: RevenueBase Database · checked Sep 20, 2026
25	Dynamic Diving Services	Partial evidence	Durbanville, South AfricaHQ checked Sep 20, 2026	11-50	4 contacts →
	Partial evidence “Dynamic Diving Services, based in the vibrant coastal landscapes of South Africa, stands as a beacon of excellence in marine engineering and underwater operations.” Source: RevenueBase Database · checked Sep 20, 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 geotechnical 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 geotechnical firms.
Partial evidence: Its own public description names part of marine geotechnical firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name marine geotechnical 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 123 marine geotechnical firms based in South Africa

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Marine geotechnical firms based in South Africa at a glance

As of Sep 20, 2026

23.0%Verified-email coverage

7.7Average contacts per company

1-10Median size (employees)

18.7%Largest-city concentration · Cape Town

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

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 123 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 geotechnical 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 geotechnical 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 geotechnical 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 geotechnical 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, 217 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 20, 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.

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 geotechnical 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 geotechnical firms are there based in South Africa?

RevenueBase identified 123 marine geotechnical 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?

Geogroup, headquartered in Gauteng, tops this list with the largest team on record.

Which city has the most marine geotechnical firms?

Cape Town leads with 23 headquartered companies, followed by Johannesburg (13) and Durban (5).

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 217 verified decision-maker contacts tracked across these 123 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 20, 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.