Welcome to Prottolk Investments

We do commissioning, maintenance, technical support, service, installation and sales of spares to the following products:
Variable Speed Drives (VSD)
Switch gear (LV and MV)

About Us

Prottolk (Pty) Ltd is all about pushing boundaries and pioneering engineering solutions to benefit the future of businesses and society. Our aim is to be a leading total solutions company for the public and private sector. It is our vast outlook of engineering that constantly challenges us to open perimeters, leading to a wide range of services including electrical, mechanical & civil engineering solutions. We’re confident in our abilities because we are led by capable and competent personnel.
Prottolk (Pty) Ltd is committed to providing quality professional services, lasting solutions, developing long-term relationships, adapting to the changing needs of our clients and the industries we operate within. We take pride in meeting and exceeding client expectations and being a contributing member to the communities where we work and live.
We will excel in our contracts both in domestic and international markets and enlarge our capability continuously in the value chain from concept through design, engineering, planning, implementation and commissioning. We will become a most preferred prominent player with commitment to quality, safety, environment, cost economics and delivery. We shall build a team of professionals with cross functional expertise, skills in project and construction management, design, engineering, finance and economics and thus address ourselves to opportunities booming in the local and international markets. We shall explore alliances and combinations via franchises, joint ventures, technical collaboration, outsourcing etc. With a flexible approach, we endeavour to source our supplies from ISO 9001 accredited entities to ensure quality compliance.

Our Services

In our solution-based approach, we offer variable speed drives, Control System design, System Integration & Instrumentation. Client service is a top priority for us, and to date, we are proud to have completed projects for companies such as Tronox Minerals, Namakwa Sands plant in the Western Cape, De Beers: Manufacturing division and Vale: Nacala Coal Terminal Mozambique, to mention a few. We don’t just meet our clients’ expectations, we exceed them.


We supply the following equipment and provided value added services to clients.

Control System design

• Control system audit and risk assessment
• PLC system design, including panel design
• Preparation of functional specification
• PLC programming, configuration and commissioning
• SCADA configuration
• Telemetry system design
• PLC – PLC and PLC – SCADA communication networks
• Profibus, ProfiNET, DeviceNET implementation, configuration and programming

Variable speed drives

• Application design and sizing
• Commissioning
• Preventative and predictive maintenance
• After sales repairs and after hours call outs


• Telemetry system for remote monitoring and control of process plant
•Preparation P&ID drawings and loop diagrams

System Integration

• Profibus technical audits
• Profibus system design
• Industrial EtherNET network design and installation
• Fibre optic system
• Substation automation
• Protection relay testing and commissioning


A 100% Black-owned company

Prottolk (Pty) Ltd has three black Executive Directors who each head up a division of their expertise. With a combined 30 years of electrical and mechanical engineering experience, the directors uphold excellence and are thrusted by an ethos to contribute to the communities they live and operate in.

Staff members

Other dynamic staff members include a Sales Manager, an Electrical Engineer, a Project Manager, electricians, mechanical fitters and an Administrator. Every individual at Prottolk (Pty) Ltd is passionate about what they do, and everyone is on board to revitalize our industry with expertise, excellence and teamwork.

Keletso Pitso – Director: Sales & Business Development

Keletso is responsible for sales and business development section, he is also involved in the after sales support. He does system design, sourcing and commissioning. Keletso has extensive experience in having done work both locally and across the African continent as a factory automation specialist, his experience among others is Industrial Automation design, commissioning and application support to large projects. He also have a deep knowledge of electrical distribution and transmission equipment installations and refurbishment. He has expert level international certification in Variable Speed Drives from top engineering firms. He has previously held a general management position managing multi discipline teams of technicians, and electricians.

Thabo Rasenyalo – Director: Finance, HR and Planning

Thabo is responsible for financial control, human resource management and overall planning of the company, he is also looking after turnkey projects playing the overall project manager role within the organisation. Thabo extensive experience in electrical and mechanical engineering having worked in a power station, he has worked across the continent and earned respect within the mining, minerals and HVAC industry as an automation specialist, he has Variable Speed Drives expert level international certification. He successfully ran a facilities management company before joining Prottolk and he is a property investor.

Tiisetso Leeuw – Director: Technical Support & Service

Tiisetso is responsible for technical support and service, which also includes smart metering solution. He also does plant / factory energy management studies, advisory, provides and implements the solutions. Tiisetso has true passion in alternative energy sources and he works very close with the other divisions by helping them provide greener solutions to customers. He has commissioned one of big solar inverter projects in South Africa and Seychelles. He has extensive experience in factory automation from concept stage up to commissioning and handover stages. He has got Variable Speed Drives expert level certification and intermediate PLC and DCS training.

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