Company lists · Data refreshed September 2026

Top 25 Infrastructure design companies based in Johannesburg, South Africa

Name: Infrastructure design companies based in Johannesburg, South Africa
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 98 companies tracked

RevenueBase identified 98 infrastructure design companies headquartered in Johannesburg, South Africa as of September 2026 and tracks 2,572 professional contacts across them, including 772 with verified work emails. Johannesburg is the largest hub.

This list covers infrastructure design companies headquartered in Johannesburg, 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

98Companies

2,572Contacts tracked

772Verified emails

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The 25 largest infrastructure design companies based in Johannesburg, South Africa

Ranked by team size

Top 25 of 98 infrastructure design companies based in Johannesburg, South Africa, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to infrastructure design 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	WSP In Africa	Indirect evidence	Johannesburg, South AfricaHQ checked Sep 20, 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 20, 2026
2	Jones & Wagener PTY LTD	Indirect evidence	Johannesburg, South AfricaHQ checked Sep 20, 2026	51-200	228 contacts →
	Indirect evidence “Jones & Wagener is a specialist firm of consulting engineers and scientists based in South Africa.” Source: RevenueBase Database · checked Sep 20, 2026
3	Bentel Associates International PTY LTD	Partial evidence	Johannesburg, South AfricaHQ checked Sep 20, 2026	201-500	174 contacts →
	Partial evidence “Bentel Associates International (BAI) was founded in 1960 with the desire to create innovative and practical designs that ensure attractive public environments and achieve…” Source: RevenueBase Database · checked Sep 20, 2026
4	Temi Construction	Indirect evidence	Johannesburg, South AfricaHQ checked Sep 20, 2026	201-500	146 contacts →
	Indirect evidence “Temi Construction was established in 2010 as a fully functional civil engineering and construction firm.” Source: RevenueBase Database · checked Sep 20, 2026
5	Veritas Engineering And Project Management Consultants	Indirect evidence	Johannesburg, South AfricaHQ checked Sep 20, 2026	201-500	103 contacts →
	Indirect evidence “VERITAS Engineering was founded on the premise of supporting our Client’s in meeting their business growth objectives.” Source: RevenueBase Database · checked Sep 20, 2026
6	Henry Fagan Consulting Engineers & Project Managers	Partial evidence	Johannesburg, South AfricaHQ checked Sep 20, 2026	201-500	99 contacts →
	Partial evidence “At Henry Fagan Consulting Engineers & Project Managers, we are a 100% black-owned, design-focused firm with over 40 years of experience delivering innovative, sustainable, and…” Source: RevenueBase Database · checked Sep 20, 2026
7	Osmond Lange Architects	Partial evidence	Johannesburg, South AfricaHQ checked Sep 20, 2026	51-200	84 contacts →
	Partial evidence “Osmond Lange blends architecture, urban design and development management skills to deliver an integrated package of professional services to its clients.” Source: RevenueBase Database · checked Sep 20, 2026
8	Lidwala Consulting Engineers SA PTY LTD	Indirect evidence	Johannesburg, South AfricaHQ checked Sep 20, 2026	11-50	52 contacts →
	Indirect evidence “Lidwala Consulting Engineers (SA)(Pty) Ltd is a multi-disciplinary medium sized consultancy with its headquarters in Johannesburg, South Africa.” Source: RevenueBase Database · checked Sep 20, 2026
9	Light Fibre Infrastructure	Partial evidence	Johannesburg, South AfricaHQ checked Sep 20, 2026	201-500	50 contacts →
	Partial evidence “Light Fibre Infrastructure specialises in long-haul telecommunications and utility infrastructure.” Source: RevenueBase Database · checked Sep 20, 2026
10	LEOKA	Indirect evidence	Johannesburg, South AfricaHQ checked Sep 20, 2026	51-200	49 contacts →
	Indirect evidence “We offer expertise in multi-disciplinary engineering, project management and advisory services.” Source: RevenueBase Database · checked Sep 20, 2026
11	Maziya General Services CC	Indirect evidence	Johannesburg, South AfricaHQ checked Sep 20, 2026	51-200	46 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 20, 2026
12	Mamadi And Company SA PTY LTD	Partial evidence	Johannesburg, South AfricaHQ checked Sep 20, 2026	11-50	35 contacts →
	Partial evidence “Mamadi and Company SA Provides End to End Solutions within Engineering and Environmental, Infrastructure Development, Air Quality management services within the private and Public…” Source: RevenueBase Database · checked Sep 20, 2026
13	Venn Milford Incorporated	Indirect evidence	Johannesburg, South AfricaHQ checked Sep 20, 2026	51-200	30 contacts →
	Indirect evidence “Since 1947, we have built a reputation as cutting-edge visionaries who deliver quality multi-disciplinary projects and consulting services to clients in the mining, engineering…” Source: RevenueBase Database · checked Sep 20, 2026
14	L&s Consulting PTY LTD	Indirect evidence	Johannesburg, South AfricaHQ checked Sep 20, 2026	51-200	26 contacts →
	Indirect evidence “L&S Consulting (Pty) Ltd is involved in Structural and Civil Consulting Engineering, mainly for the private sector for industrial, retail and office developments.” Source: RevenueBase Database · checked Sep 20, 2026
15	Themba Consultants	Partial evidence	Johannesburg, South AfricaHQ checked Sep 20, 2026	11-50	24 contacts →
	Partial evidence “At Themba we provide professional consulting services in infrastructure development.” Source: RevenueBase Database · checked Sep 20, 2026
16	Ipes Consulting Engineers	Partial evidence	Johannesburg, South AfricaHQ checked Sep 20, 2026	11-50	21 contacts →
	Partial evidence “Instrumented Process and Electrical Systems (IPES) was established as an independent engineering design house in 1988 in Johannesburg, South Africa.” Source: RevenueBase Database · checked Sep 20, 2026
17	Calliper PTY LTD	Partial evidence	Johannesburg, South AfricaHQ checked Sep 20, 2026	11-50	20 contacts →
	Partial evidence “Calliper is a South Africa–headquartered infrastructure development firm delivering high-impact projects across the African continent.” Source: RevenueBase Database · checked Sep 20, 2026
18	Rasnco Consulting Engineers	Indirect evidence	Johannesburg, South AfricaHQ checked Sep 20, 2026	201-500	20 contacts →
	Indirect evidence “We at Rasnco Investments, are a vibrant and innovative company wholly owned by black Professionals, which was established at the beginning of 2017.” Source: RevenueBase Database · checked Sep 20, 2026
19	Optimult	Indirect evidence	Johannesburg, South AfricaHQ checked Sep 20, 2026	11-50	18 contacts →
	Indirect 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 20, 2026
20	Coresol	Partial evidence	Johannesburg, South AfricaHQ checked Sep 20, 2026	51-200	18 contacts →
	Partial evidence “Modern organisations run on complex infrastructure.” Source: RevenueBase Database · checked Sep 20, 2026
21	Avenirholdings	Partial evidence	Johannesburg, South AfricaHQ checked Sep 20, 2026	11-50	18 contacts →
	Partial evidence “AvenirHoldings is a group of businesses whose business is to provide innovative and leading solutions in the delivery of infrastructure and ‘built’ projects.” Source: RevenueBase Database · checked Sep 20, 2026
22	ADA Consulting Engineers	Indirect evidence	Johannesburg, South AfricaHQ checked Sep 20, 2026	11-50	18 contacts →
	Indirect evidence “ADA Consulting Engineers offers professional consulting engineering services to clients in the development of industrial, commercial and public projects in the civil and…” Source: RevenueBase Database · checked Sep 20, 2026
23	TKDS	Strong evidence	Johannesburg, South AfricaHQ checked Sep 20, 2026	11-50	16 contacts →
	Strong evidence “TKDS is a boutique property and infrastructure solutions firm that specialises in design, advisory, and turnkey solutions within the built environment industry.” Source: RevenueBase Database · checked Sep 20, 2026
24	Gridbow	Partial evidence	Johannesburg, South AfricaHQ checked Sep 20, 2026	11-50	16 contacts →
	Partial evidence “Gridbow is an Award Winning Electrical Infrastructure, Civil Engineering, Consulting, Maintenance and General Services Contracting Company.” Source: RevenueBase Database · checked Sep 20, 2026
25	Dhahabu Consulting	Indirect evidence	Johannesburg, South AfricaHQ checked Sep 20, 2026	11-50	15 contacts →
	Indirect evidence “Dhahabu Consulting (Pty) continuously works to being the partner, service provider and employer of choice offering customised project management, project controls (quantity…” 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: infrastructure design 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 infrastructure design companies.
Partial evidence: Its own public description names part of infrastructure design companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name infrastructure design 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 98 infrastructure design companies based in Johannesburg, South Africa

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Infrastructure design companies based in Johannesburg, South Africa at a glance

As of Sep 20, 2026

30.0%Verified-email coverage

26.2Average contacts per company

11-50Median size (employees)

100.0%Largest-city concentration · Johannesburg

Sep 20, 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 across the whole South Africa list rather than for Johannesburg, so it is reported there. Company counts and contact totals on this page are exact for Johannesburg, over 98 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 infrastructure design 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 Johannesburg, South Africa whose own description of what they do matches “infrastructure design 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 infrastructure design 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 infrastructure design companies, and records with no verified work email. Companies headquartered outside Johannesburg 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, 772 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.

Infrastructure design companies by metro in South Africa

Infrastructure design companies in Johannesburg98
Infrastructure design companies in Pretoria53
Infrastructure design companies in Durban34
Infrastructure design companies in Cape Town32
Infrastructure design companies in Midrand32
Infrastructure design companies in City Of Tshwane30

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 infrastructure design companies, 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 infrastructure design companies are there based in Johannesburg, South Africa?

RevenueBase identified 98 infrastructure design companies headquartered in Johannesburg, 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 infrastructure design companies?

Johannesburg leads with 98 headquartered companies, followed by Pretoria (53) and Durban (34).

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 772 verified decision-maker contacts tracked across these 98 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.