Company lists · Data refreshed September 2026

Top 25 Geotechnical engineering companies based in South Africa

Name: Geotechnical engineering companies based in South Africa
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 6, 2026 264 companies tracked

Find 264 geotechnical engineering companies based in South Africa, with 2,562 business contacts and 855 email addresses, published September 2026. Johannesburg is the single most-represented city among the companies on this list. Use the directory to identify firms for site investigation, subsurface analysis, foundation design, and related project needs.

Geotechnical engineering companies investigate soil, rock, groundwater, and subsurface conditions to inform foundation design, earthwork, construction, and infrastructure projects. This list covers companies that provide geotechnical investigation, testing, analysis, design, consulting, or related subsurface engineering services. Ranked by team size, largest first. Data current as of September 6, 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 6, 2026 86% judged on-target in blind review

264Companies

2,562Contacts tracked

855Verified emails

81Mobile numbers

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The 25 largest geotechnical engineering companies based in South Africa

Ranked by team size

Top 25 of 264 geotechnical engineering companies based in South Africa, ranked by team size, largest first. Data refreshed Sep 6, 2026. RevenueBase Smart Search rates how each company's information relates to geotechnical engineering companies: 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	Jones & Wagener PTY LTD	Indirect evidence	Johannesburg, South AfricaHQ checked Sep 6, 2026	51-200	228 contacts →
	“Jones & Wagener is a specialist firm of consulting engineers and scientists based in South Africa.” Source: company website · checked Sep 6, 2026
2	Civils 2000 PTY LTD	Partial evidence	Cape Town, South AfricaHQ checked Sep 6, 2026	501-1,000	161 contacts →
	“With over 30 years of experience in the construction of developments, roads, pipelines, and commercial buildings, Civils is committed to delivering excellence in civil engineering…” Source: company website · checked Sep 6, 2026
3	TDS Projects Group PTY LTD	Indirect evidence	Irene, South AfricaHQ checked Sep 6, 2026	201-500	87 contacts →
	“TDS Projects is a dynamic, medium-sized construction company based in Irene, Pretoria.” Source: company website · checked Sep 6, 2026
4	Semane Engineering Solutions PTY LTD	Partial evidence	Johannesburg, South AfricaHQ checked Sep 6, 2026	501-1,000	71 contacts →
	“Semane Engineering Solutions (Pty) Ltd is an independent South African multi-disciplinary consulting company that provides project management and engineering solutions in…” Source: company website · checked Sep 6, 2026
5	Geogroup	Indirect evidence	Sunrella, South AfricaHQ checked Sep 6, 2026	201-500	68 contacts →
	Source: company website · checked Sep 6, 2026
6	GAST	Indirect evidence	Pretoria, South AfricaHQ checked Sep 6, 2026	201-500	63 contacts →
	“GAST, founded in 1961 had its roots in the chemical industry.” Source: company website · checked Sep 6, 2026
7	CSV Construction PTY LTD	Partial evidence	Cape Town, South AfricaHQ checked Sep 6, 2026	201-500	60 contacts →
	“CSV Construction (Pty) Ltd is a leading diversified Civil Engineering Company with a track record of over 30 years of delivering quality works to clients in Civil and Concrete…” Source: company website · checked Sep 6, 2026
8	G4 Mining And Civils PTY LTD	Indirect evidence	Benoni, South AfricaHQ checked Sep 6, 2026	51-200	58 contacts →
	“Based in Benoni, Gauteng, G4 Mining and Civils (Pty) Ltd is a premier South African construction company specializing in the mining infrastructure sector.” Source: company website · checked Sep 6, 2026
9	Geosure PTY LTD	Partial evidence	Durban, South AfricaHQ checked Sep 6, 2026	51-200	57 contacts →
	“Since the company's inception in 1992, Geosure has established a formidable reputation in Southern African Geotechnics.” Source: company website · checked Sep 6, 2026
10	AM Consulting Engineers PTY LTD	Partial evidence	Midrand, South AfricaHQ checked Sep 6, 2026	201-500	56 contacts →
	“AM Consulting Engineers (Pty) Ltd (AMCE) provides professional engineering and consulting services to the public and private infrastructure sector.” Source: company website · checked Sep 6, 2026
11	ARQ Consulting Engineers PTY LTD	Partial evidence	Pretoria, South AfricaHQ checked Sep 6, 2026	11-50	52 contacts →
	“ARQ is an award winning consulting engineering firm with a reputation as being a leader in South Africa in our specialist fields of dams & hydro, geotech and bridges.” Source: company website · checked Sep 6, 2026
12	Open House Management Solutions	Strong evidence	Potchefstroom, South AfricaHQ checked Sep 6, 2026	11-50	47 contacts →
	“Open House Management Solutions is a South-African based, Geotechnical Engineering and Seismological services provider.” Source: company website · checked Sep 6, 2026
13	Mukona Group	Strong evidence	Midrand, South AfricaHQ checked Sep 6, 2026	51-200	41 contacts →
	“Mukona Group is a holding company of Mukona Consulting Engineers and Mukona Geotechnics, offering a full spectrum of civil engineering consulting services and geotechnical…” Source: company website · checked Sep 6, 2026
14	Franki Africa PTY LTD	Partial evidence	Ottery, South AfricaHQ checked Sep 6, 2026	51-200	37 contacts →
	“Franki is the oldest and most established specialist geotechnical contractor in Sub-Saharan Africa.” Source: company website · checked Sep 6, 2026
15	LEO Consulting PTY LTD	Partial evidence	Queenswood, South AfricaHQ checked Sep 6, 2026	11-50	35 contacts →
	“LEO Consulting is a consulting engineering company established in 2008 with civil engineering staff having in excess of 100 years of combined personal professional experience in…” Source: company website · checked Sep 6, 2026
16	Phoenecian Group PTY Limited	Partial evidence	Tembisa, South AfricaHQ checked Sep 6, 2026	201-500	34 contacts →
	“Phoenecian Group is a dynamic demolition, civil, building and geotechnical contractor, with an unmatched track record in the private and public sector.” Source: company website · checked Sep 6, 2026
17	Project Management International	Partial evidence	South AfricaHQ checked Sep 6, 2026	11-50	30 contacts →
	“Project Management International (PMI) is a dynamic project management company specialising in tailor-made Marine Construction, Engineering Services and Survey & Site…” Source: company website · checked Sep 6, 2026
18	Kitso Botlhale Consulting Engineers	Indirect evidence	Midrand, South AfricaHQ checked Sep 6, 2026	11-50	29 contacts →
	“KITSO BOTLHALE CONSULTING ENGINEERS is a company based out of the International Business Gateway, C/o Pioneer and Elizabeth Road, Midridge Park Midrand” Source: company website · checked Sep 6, 2026
19	Geotheta Consulting Engineers And Scientists	Partial evidence	Johannesburg, South AfricaHQ checked Sep 6, 2026	51-200	28 contacts →
	“Tailings management today requires more than engineering excellence, it demands independent oversight, structured governance, and defensible risk frameworks.” Source: company website · checked Sep 6, 2026
20	Sotiralis Consulting Engineers	Indirect evidence	Faerie Glen, South AfricaHQ checked Sep 6, 2026	11-50	28 contacts →
	“About us: Sotiralis Consulting Engineers (Pty) Ltd was established in 2007 and is the successor of Sotiralis Consulting (Pty) Ltd (trading as Sotiralis & Associates since 1985).” Source: company website · checked Sep 6, 2026
21	Peragage	Strong evidence	City Of Tshwane, South AfricaHQ checked Sep 6, 2026	11-50	25 contacts →
	“PeraGage is a Leading, Trusted and the Preferred specialist firm of geo-consultants including hydrogeologists, geotechnical engineers and engineering geologists operating…” Source: company website · checked Sep 6, 2026
22	Bloc Contractors	Partial evidence	Durban, South AfricaHQ checked Sep 6, 2026	51-200	25 contacts →
	“Bloc Contractors was established in 2002 and offers specialist geotechnical services such as pipejacking, sheet piling, shoring, lateral support, microtunneling and more.” Source: company website · checked Sep 6, 2026
23	DG Consulting Engineers PTY LTD	Partial evidence	City Of Tshwane, South AfricaHQ checked Sep 6, 2026	11-50	24 contacts →
	“DG Consulting Engineers is a Civil and Structural consulting Engineering Company based in South Africa.” Source: company website · checked Sep 6, 2026
24	A19 Consulting Engineers	Indirect evidence	Cape Town, South AfricaHQ checked Sep 6, 2026	11-50	23 contacts →
	“Over the past 20+ years we have successfully delivered services to clients in a wide variety of residential, commercial, and industrial projects with scopes ranging from small to…” Source: company website · checked Sep 6, 2026
25	Resultant Consulting Engineers	Partial evidence	Johannesburg, South AfricaHQ checked Sep 6, 2026	1-10	22 contacts →
	“Resultant Consulting Engineers is a dynamic engineering firm specialising in structural design in the mining and heavy industrial sectors.” Source: company website · checked Sep 6, 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: geotechnical engineering companies. 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 geotechnical engineering companies.
Partial evidence: Its own public description names part of geotechnical engineering companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name geotechnical engineering companies. 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 264 geotechnical engineering companies based in South Africa

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Geotechnical engineering companies based in South Africa at a glance

As of Sep 6, 2026

33.4%Verified-email coverage

3.2%Mobile-number coverage

9.7Average contacts per company

1-10Median size (employees)

14.0%Largest-city concentration · Johannesburg

Sep 6, 2026Page data refreshed

Companies by employee count

1-10

145

11-50

51-200

201-500

501-1,000

Freshness & accuracy

How recently the business emails on this list were verified

Email last verified

7920–30

6131–60

161–90

090–180

1180+

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 geotechnical engineering companies, 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 “geotechnical engineering companies”. 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 geotechnical engineering companies), 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 geotechnical engineering companies, 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, 855 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 6, 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.

Geotechnical engineering companies by metro

Geotechnical engineering companies in Johannesburg37

Frequently asked

What do geotechnical engineering companies do?

Geotechnical engineering companies assess soil, rock, groundwater, and subsurface conditions to support foundation design, earthwork, construction, and infrastructure projects.

How many geotechnical engineering companies are based in South Africa?

The directory lists 264 geotechnical engineering companies based in South Africa.

Where are most geotechnical engineering companies located?

Johannesburg is the single most-represented city among the companies on this list.

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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.