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Ceenex is an independent management, technology and engineering advisory firm, solving complexity through the application of our skills in Engineering Design and Solutions, Telecommunication Infrastructure, Simulation and Optimisation.



We are privately owned with offices in City of Tshwane (Gauteng, South Africa) but provides our services across South Africa and abroad. The directors of Ceenex have extensive international experience in Government, Utility and Private Sector consulting assignments. Primary competencies include Infrastructure Design, Water Engineering, Telecommunication Infrastructure Design and Implementation, Business Engineering, Simulation and Optimisation,

Since 2000, multinationals, governments and small/medium enterprises have called upon Ceenex for unique solutions. Our track record covers more than 500 assignments delivered over the past 20 years to more than 180 clients in the private and public sector and highlight our exceptional experience.


We differentiate ourselves from our competitors as follows…

  • Track record of solving a broad range of complex challenges

  • Proven history of delivery of innovative solutions

  • Multi-skilled across functional discipline, industry, sector and locality

  • Best of breed approach

  • Extraordinary commitment and loyalty

  • Very competitive rates

  • Exceptional value adding


You are invited to contact us for additional information or further advice on solving your complex business challenges.


Graphic of the Ceenex enginerring structure


Strategic Analysis Design

Modeling Simulation

Project & Program Management

Technology Consulting

i-RMs Interactive

Resources Managers

Object Oriented Business

Process Analysis Design

Information Infrastructure

Analysis Design & Support

Performance Management


Our proven engagement process (envision, assess, design, decide, deploy and support) can be applied from a one-to-one, to a many-to-many relationship with regard to the Client business level (strategic, operational/functional, transactional) and the Client business dimension (desired state/vision, structure, process, system, resource).


Sarel Holtzhausen

Name: Sarel Holtzhausen Pr Eng.

Designation: Director

Experience: 16 years

Qualifications: B Eng (Civil) B Eng Hons (Water Resource Engineering), University of Pretoria

Professional affiliations: ECSA, SAICE, WISA, IMESA


Sarel Holtzhausen has been working in the municipal infrastructure and mainly the water sector since the start of his career in 2003. Initially as a civil designer on water projects ranging from treatment plants, pump stations and reticulation systems and later as a water planning consultant and process designer for water supply systems and wastewater treatment plants. He has been part of numerous infrastructure projects within the following key disciplines:


  • Residential, commercial and industrial developments

  • Grant funded Municipal infrastructure projects

  • Potable Water Treatment

  • Industrial and Domestic Wastewater Treatment and Re-use

  • Existing Treatment facilities, optimisation and process audits

  • Refurbishment of municipal water and sanitation infrastructure

  • Pipeline and pumped systems

  • Feasibility and funding applications for infrastructure projects

  • Mining infrastructure


Sarel Holtzhausen started his career in 2003 with Africon Engineering International. He then joined LHL Consulting Engineers in 2004, which later became Sizatech Consulting Engineers. In 2008, he became a shareholder and Director of Sizatech which in 2014 merged with Ceenex (Pty) Ltd. He is currently an Executive Director with Ceenex, heading the Engineering Business Unit.

Kgomotso Sekgobela

Name: Kgomotso Sekgobela

Designation: Director

Experience: 14 years

Qualifications: National N Diploma - Electrical Engineering (Central Johannesburg College) Global Executive Development Programme (University of Pretoria’s Business School - GIBS)


Mr Sekgobela has collective experience in entrepreneurship, project management; construction management; marketing and business development (both existing & new). He is proficient in key project identification, negotiation and execution. He is also experienced in determining and formulating relevant policies and providing the overall direction of a company and projects that he is involved in. He is experienced in developing strategic plans to advance the companies mission and objectives and to promote revenue, profitability and growth. He is an expert in directing the company's operations to insure production efficiency, quality, service, and cost-effective management of resources.


In 2018 he became an Executive Director at Ceenex, heading the Business Development Business Unit.

Imre Viljoen

Name: Viljoen, Imre

Designation: Director

Experience: 29 years

Qualifications: B Eng (Industrial) cum laude, University of Pretoria

Professional affiliations: Member of Southern African Institute for Industrial Engineering (MSAIIE).

Imre has been an active player in the Engineering and Information Technology arena for more than 29 years in the following areas:

  • Business & Process simulation, modelling and optimization

  • Information Technology Architecture and Systems Design and Support

  • Supply-chain modelling, scheduling and optimization

  • Real-time process control and automation using simulation

  • Digital Twin Deployment

  • Business Process design

  • Financial Process design and optimization

  • Financial Management and Support

  • Management Information System (MIS/MES) design and support

  • Decision Support Systems development

  • Web based Information Systems

  • Transport Scheduling system

  • Customer Relationship Management

Career highlights include solving complex process and systems problems; modelling, simulation and system development for the mining, transport, logistics and water sectors; application of TOC in mining; CIO; ERP implementation and Customer Care system implementation in the water sector; water services strategic and institutional designs; water resources systems implementation; information technology systems design; auditing and analysis of business and infrastructure; design of business processes and systems.

Imre joined Ceenex in December 2000, and in 2008 he became an Executive Director at Ceenex, heading the Business Engineering Unit.

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