About Us

Robtek was established in October 1984 as an on-site mechanical services company, focused on enabling, supporting and delivering top quality artisan functions to the mining and manufacturing industry. The partnership began between two brothers, Michael and Derek Robinson after identifying a gap in the market.

The Robinson brothers acquired new investors and partners in 2017 giving Robtek B-BBEE level 3 status. With this growth and availability on-site came an opportunity to not only install mill and kiln machines but offer a full turnkey solution and assist with the sourcing of parts, repairs, maintenance and alignment. Although specialists in mill and kiln work, we have also been involved in furnace electrode, filter, cooler, ESP, ducting and structural steel installations. Just another way we add value for customers. 

With 37 years experience, we are proven specialists in the field, working with customers from metal, precious metal, cement and other industrial sectors. We are committed to building long-term relationships by delivering a high quality finish and precision to all projects, every time. We work off four simple values: Discipline, Quality, Trustworthy and honest, and Commitment to relationships.

Employing over 59 people, all staff are qualified with the necessary skills and experience to be able to work on-site, this is how we guarantee quality and add value. Yearly, all employees go through the necessary SETA accreditation and Health and Safety protocols that are requirements for the mines. Our senior staff have combined 147 years plus experience. Our slogan sums up this collection of skills nicely.

Together we have value!  


BEE Level 3 Certificate

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ISO 9001:2015 Certificate

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ISO 45001:2018 Certificate

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ISO 14001:2015 Certificate

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Robtek KGS Certification
meet the team
Sean None - Managing Director

Sean None – Managing Director


Sean has been in the finance and operations industry for fifteen (15) years. After completing his Honors in Economic Science, he started out in the financial services sector. Sean joined Robtek early on in his career, leaving them to start up his own software company. After selling the software company, he was approached to come back to Robtek as Managing Director, proving his capabilities as a leader to take the business to the next level.

Sean is passionate about the challenge of private business, making sure the bills are paid and providing a quality service to customers. His goal is to ensure the company continues to grow and succeed, creating opportunities for staff and customers alike.

Robtek Team | Hentie

Hentie van Rooyen – Site Manager

Hentie has been with Robtek for twenty-six (26) years and is currently a Site Manager. With no formal qualification, hard work and determination has given him every kind of experiential qualification needed to become one of Robtek’s technical advice and support experts. His experience covers: fitting, boilermaker, rigging, mill installation, mill technical support, furnace electrodes, and slipping devices installation, various seal type installation, kiln technical support, conveyor installation, and steel erecting.

Hentie’s biggest accomplishment includes his first mill installation that was completed in Burkina Faso.

Dino Pietroiusti - Kiln’s Champion

Dino Pietroiusti – Project Manager

Dino has been a rotary kilns and dryer specialist for twenty (20) years. After completing his National Diploma in Mechanical Engineering he started his career at Insimbi alloys as a junior field service engineer and worked his way up to kiln divisional manager. After ten (10) years at Insimbi he resigned and joined the Robtek team as a senior manager involved in site services, sales and project engineering. Dino has since been made partner and shareholder of Robtek with his main responsibilities including sales, project management, site operational management, client relations and spare supplies.

Dino is passionate about building client relationships, ensuring each job receives the right amount of attention and having the right attitude. After learning some valuable lessons early on in his career and being handpicked from the founders of Robtek to join their team, Dino takes this experience and trust with him to solve unplanned breakdowns with ease.

Cobus van Wyk

Cobus Van Wyk -General Manager Hofmann Engineering Division


Cobus has over twenty-five (25) years of experience in the field of engineering, technical services, projects management and internal departmental management. After qualifying as a technologist in mechanical engineering, Cobus was recruited by Total SA to join the Operations Management Training Program where he spent 10 years. In 2000, Cobus completed a MAP (Management Advanced Program) Diploma at Wits University and in 2006 completed his Advanced Diploma in Project Management.

Cobus was recruited by Polysius SA in 2007 to assist with commissioning the HPGR installations. Cobus was eventually certified by Polysius Germany as a Competent Commissioning Engineer, the only one in Polysius outside Germany.

In 2016 Thyssenkrupp approached Cobus to investigate the viability of starting a Process Technologies Service Department in Sub-Sahara Africa where he spent 2 years on the rebuilding of Coke Oven Batteries at the Arcelor Mittal South Africa.

George Silinda – Master Artisan


George has over twenty six (26) years experience working in operational factories, working his way up within the Robtek ranks to become one of the lead site managers and Directors. His career started early when he left school at the age of 14 with a Grade 8 qualification but that didn’t stop him from building his career and completing certificates along the way. He has been with Robtek for twenty five (25) years and is responsible for overseeing all operations and communication while on site.

George is passionate about his work, his greatest achievements include over ten (10) high risk, high complexity Kiln section replacement projects. His loyalty, discipline, hard work and passion led him to the success he is today.


Robtek Team Garfield

Garfield Pretorius – Safety Manager


Garfield has been working in the safety environment for eleven (11) years and is currently the Safety Manager for Robtek. He started his career in construction in the UK and became a junior safety officer in 2010 where he completed his Modern SHEQ and Risk Management (IRCA) qualifications. He’s experienced in implementing processes and systems to manage the health and safety of the employees and environment on site. Compiles safety files and other site specific files, facilitates risk assessments, coordinates emergency drills and facilitates incident investigations.

Garfield is passionate about closing our projects with no injuries, health or environmental incidents and damage to property. One of his biggest accomplishments has been his involvement in getting Robtek ICO certified. He’s constantly working on ensuring the safety of his people.

Cobus Kruger – Technical Advisor

Cobus Kruger – Technical Advisor


Cobus has been working in various industries for the past 27 years, having spent the bulk of this time with South African Cement manufacturers. He also spent time working for Rio Tinto (RBM) and Mondi SA. He is a qualified Millwright and an accomplished Condition Monitoring Specialist, with ISO Certifications in various CM disciplines. Cobus joined Robtek late in 2022 as a Technical Advisor and his main responsibilities include sales, project scoping, and site technical support.

Cobus is passionate about precision maintenance and ensuring that the clients receive the right technical advice and support and works with clients to find the best possible solutions for their challenges. With his background and experience, he strives to find proper engineering solutions for operational site challenges.