Company lists · Data refreshed September 2026

Top 25 Engineering design optimization companies based in South Africa

Name: Engineering design optimization companies based in South Africa
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 16, 2026 167 companies tracked

RevenueBase identified 167 engineering design optimization companies headquartered in South Africa as of September 2026 and tracks 1,347 professional contacts across them, including 354 with verified work emails. Pretoria is the largest hub.

This list covers engineering design optimization companies 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 16, 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 16, 2026 86% judged on-target in blind review

167Companies

1,347Contacts tracked

354Verified emails

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

The 25 largest engineering design optimization companies based in South Africa

Ranked by team size

Top 25 of 167 engineering design optimization companies based in South Africa, ranked by team size, largest first. Data refreshed Sep 16, 2026. RevenueBase Smart Search rates how each company's information relates to engineering design optimization 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	Modena Design Centres	Partial evidence	Johannesburg, South AfricaHQ checked Sep 16, 2026	51-200	194 contacts →
	Partial evidence “Established in Modena Design Centres has been dedicated to helping our customers work more efficiently.” Source: RevenueBase Database · checked Sep 16, 2026
2	Sutherland	Partial evidence	Cape Town, South AfricaHQ checked Sep 16, 2026	51-200	102 contacts →
	Partial evidence “Sutherland is a multi-disciplinary consulting engineering company with offices in Cape Town, Johannesburg, Durban, and Nairobi, Multidisciplinary sub-disciplines include…” Source: RevenueBase Database · checked Sep 16, 2026
3	Khonzi Engineering Services	Indirect evidence	Richards Bay, South AfricaHQ checked Sep 16, 2026	51-200	40 contacts →
	Indirect evidence “Established by Nokuthula Madondo in November and based in Richards Bay, South Africa with a branch in Durban Kwazulu-Natal.” Source: RevenueBase Database · checked Sep 16, 2026
4	Venter Consulting Engineers	Partial evidence	Centurion, South AfricaHQ checked Sep 16, 2026	11-50	31 contacts →
	Partial evidence “Venter Consulting Engineers is a small group of talented professionals with a passion for precision engineering.” Source: RevenueBase Database · checked Sep 16, 2026
5	Sotiralis Consulting Engineers	Indirect evidence	Faerie Glen, South AfricaHQ checked Sep 16, 2026	11-50	28 contacts →
	Indirect evidence “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: RevenueBase Database · checked Sep 16, 2026
6	Plantech PTY LTD	Partial evidence	Pretoria, South AfricaHQ checked Sep 16, 2026	11-50	25 contacts →
	Partial evidence “Plantech (Pty) Ltd is a consulting engineering firm established in 1982 by Hein Schuld, James Theron and Peet Olivier.” Source: RevenueBase Database · checked Sep 16, 2026
7	DG Consulting Engineers PTY LTD	Partial evidence	City Of Tshwane, South AfricaHQ checked Sep 16, 2026	11-50	24 contacts →
	Partial evidence “DG Consulting Engineers is a Civil and Structural consulting Engineering Company based in South Africa.” Source: RevenueBase Database · checked Sep 16, 2026
8	TTS Support Services	Partial evidence	Pretoria, South AfricaHQ checked Sep 16, 2026	51-200	24 contacts →
	Partial evidence “In 2013 TTS Consulting and Design derived out of the skill-set of several professionals.” Source: RevenueBase Database · checked Sep 16, 2026
9	A19 Consulting Engineers	Indirect evidence	Cape Town, South AfricaHQ checked Sep 16, 2026	11-50	23 contacts →
	Indirect evidence “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: RevenueBase Database · checked Sep 16, 2026
10	Resultant Consulting Engineers	Strong evidence	Johannesburg, South AfricaHQ checked Sep 16, 2026	1-10	22 contacts →
	Strong evidence “Resultant Consulting Engineers is a dynamic engineering firm specialising in structural design in the mining and heavy industrial sectors.” Source: RevenueBase Database · checked Sep 16, 2026
11	Dihlase Consulting Engineers	Indirect evidence	Bloemfontein, South AfricaHQ checked Sep 16, 2026	11-50	21 contacts →
	Indirect evidence “Dihlase Consulting Engineers is a company based out of South Africa.” Source: RevenueBase Database · checked Sep 16, 2026
12	DE Villiers Consult	Strong evidence	Stellenbosch, South AfricaHQ checked Sep 16, 2026	11-50	18 contacts →
	Strong evidence “Class-leading design and economic engineering solutions.” Source: RevenueBase Database · checked Sep 16, 2026
13	ADA Consulting Engineers	Partial evidence	Johannesburg, South AfricaHQ checked Sep 16, 2026	11-50	18 contacts →
	Partial 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 16, 2026
14	Certus Engineering PTY LTD	Partial evidence	Johannesburg, South AfricaHQ checked Sep 16, 2026	51-200	18 contacts →
	Partial evidence “At Certus Engineering (Pty) Ltd we have an experienced capable team always standing by to attend to your special unique requirements in solution driven metal engineering.” Source: RevenueBase Database · checked Sep 16, 2026
15	Ultimate Partner Siemens Disw Partner	Strong evidence	Pretoria, South AfricaHQ checked Sep 16, 2026	11-50	17 contacts →
	Strong evidence “Ultimate Partner delivers end-to-end engineering solutions, from concept design and CAD drafting to advanced Finite Element Analysis (FEA), Design Optimization, and manufacturing…” Source: RevenueBase Database · checked Sep 16, 2026
16	Rieger Industrial Consultants RIC	Partial evidence	Johannesburg, South AfricaHQ checked Sep 16, 2026	11-50	15 contacts →
	Partial evidence “HELPING ORGANISATIONS ACHIEVE EXCELLENCE THROUGH INNOVATIVE SOLUTIONS RIC is a professional Industrial Engineering Firm that provides solutions to an array of organisations in a…” Source: RevenueBase Database · checked Sep 16, 2026
17	PBA Projects	Strong evidence	Cape Town, South AfricaHQ checked Sep 16, 2026	11-50	15 contacts →
	Strong evidence “PBA Projects Limited is an Engineering Project Design House delivering optimal Processing Solutions in the Mining Industry.” Source: RevenueBase Database · checked Sep 16, 2026
18	GKB Design Associates PTY LTD	Strong evidence	Pretoria, South AfricaHQ checked Sep 16, 2026	1-10	13 contacts →
	Strong evidence “GKB Design Associates is a consulting engineering company, specialising in Civil, Structural, Mechanical, Transportation and Electrical Engineering.” Source: RevenueBase Database · checked Sep 16, 2026
19	Modena Technologies	Strong evidence	Cape Town, South AfricaHQ checked Sep 16, 2026	11-50	12 contacts →
	Strong evidence “We specialise in helping professionals in the business of design & engineering overcome inefficiencies in their workflow by using technology & people as enablers of ultimate…” Source: RevenueBase Database · checked Sep 16, 2026
20	DGE Consulting South Africa	Strong evidence	Potchefstroom, South AfricaHQ checked Sep 16, 2026	11-50	12 contacts →
	Strong evidence “DGE was formed in 2006 with the focus on Mechanical Engineering Design & Product Development in the transport and semi military applications, and very soon were contracted to…” Source: RevenueBase Database · checked Sep 16, 2026
21	Nine DOT Solutions PTY LTD	Strong evidence	City Of Tshwane, South AfricaHQ checked Sep 16, 2026	11-50	11 contacts →
	Strong evidence “Nine Dot Solutions (Pty) Ltd focuses on analysis and design solutions to the mechanical and structural engineering fields and has successful projects in South Africa, Africa…” Source: RevenueBase Database · checked Sep 16, 2026
22	Urbanstrut Consulting Engineers	Partial evidence	Sandton, South AfricaHQ checked Sep 16, 2026	1-10	10 contacts →
	Partial evidence “Urbanstrut Consulting Engineers is a South African civil and structural engineering consultancy providing practical, technically sound engineering solutions for the built…” Source: RevenueBase Database · checked Sep 16, 2026
23	Process Design & Automation PDA	Strong evidence	Doornpoort, South AfricaHQ checked Sep 16, 2026	11-50	10 contacts →
	Strong evidence “PDA is a leading trusted Design & Automation Engineering company.” Source: RevenueBase Database · checked Sep 16, 2026
24	WJK Consulting Engineers	Indirect evidence	Potchefstroom, South AfricaHQ checked Sep 16, 2026	1-10	9 contacts →
	Indirect evidence “Founder and CEO WJ Kotzé (Pr.” Source: RevenueBase Database · checked Sep 16, 2026
25	Simteq Engineering Cadence MSC Software Partner	Partial evidence	Pretoria, South AfricaHQ checked Sep 16, 2026	1-10	8 contacts →
	Partial evidence “Previously known as ESTEQ Engineering.) SIMTEQ Engineering (Pty) Ltd specialises in Computer Aided Engineering (CAE) Software.” Source: RevenueBase Database · checked Sep 16, 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: engineering design optimization 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 engineering design optimization companies.
Partial evidence: Its own public description names part of engineering design optimization companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name engineering design optimization 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 167 engineering design optimization companies based in South Africa

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 354 reachable decision-makers.

Free signup · no credit card

View the full list →

Engineering design optimization companies based in South Africa at a glance

As of Sep 16, 2026

26.3%Verified-email coverage

8.1Average contacts per company

1-10Median size (employees)

13.8%Largest-city concentration · Pretoria

Sep 16, 2026Page data refreshed

Companies by employee count

1-10

106

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 167 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 engineering design optimization 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 “engineering design optimization 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 engineering design optimization 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 engineering design optimization 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, 354 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 16, 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 engineering design optimization 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 engineering design optimization companies are there based in South Africa?

RevenueBase identified 167 engineering design optimization companies 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?

Modena Design Centres, headquartered in Johannesburg, tops this list with the largest team on record.

Which city has the most engineering design optimization companies?

Pretoria leads with 23 headquartered companies, followed by Cape Town (22) and Johannesburg (22).

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 354 verified decision-maker contacts tracked across these 167 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 16, 2026.

Ready to reach these companies? Verified emails and direct dials for all 167 engineering design optimization companies based in South Africa. Start with a free account, no credit card.

Download this list →

Related lists

Engineering design optimization companies by geography

Browse the directory

Browse: Companies home · All South Africa lists · All Engineering design optimization companies 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.