Our team

Our global team consists of the most experienced engineers & specialists in the mining industry - pioneers who spent nearly two decades learning from our mistakes. 


Executive Management

"There's no time like now to do things"

Geoffrey Madderson

Chief executive officer


Over 15 years international experience in the Mining Industry. Has held positions in South Africa, Germany & London in Business Development, Sales and Executive Management of STARK. 

"We may build plants, but the true goal is to build people"

Jaco Prinsloo

Chief operating officer B.Ing Mech Eng / PMP


Twenty one years working experience including detailed mechanical machine design and construction, business development and implementation experience, Petro-chemical, and mineral processing. 

"Let’s go agile plant development!"

Fabian Riedel

Chief Technical Officer Dipl.-Ing. Mining Engineering 


Twenty years of experience in ore sorting applications in mineral processing and mining. Positions held as VP of Sales, Technical Director, Country Manager, and General Mine Manager in South Africa and Germany.

"Research the problem, make a plan and execute it."

Dian Heinrich Page

Group Commercial Director Pr.Sci.Nat / M.Eng Geo Tech


Ten years of exploration and mining experience, with broad exposure to modern exploration and mining procedures in areas of mineral resource management of projects. 

"Be the change that you want to see."

Mundus Smit

Group Financial Director CA (SA)


CA(SA) with a great ambition and passion for business as a whole. Consistently looking for viable opportunities is consistent with my entrepreneurial spirit. Always striving to create value add through innovation. 

"When we dare, we are often wrong. When we do not dare, we are always wrong."

Jean Flouhr

Managing director Angola Dipl.- Mech Eng (Aeronautics)


Over twenty years of experience in various diamond dredging mining projects and alluvial mining projects. 

Rheinhardt Peens

Managing director Australia B.Tech Eng


Rheinhardt is a highly respected systems engineer, co-founder as well as Managing Director. Rheinhardt is a natural leader whose passion, integrity and energy are contagious. His professionalism and work ethic combined with technical expertise with numerous automation vendors, make him the perfect candidate to guide and coordinate projects from design to successful implementation.

"Failures learn lessons to succeed"

Willem-Daniel van Dyk

Managing director Namibia Pr. Eng (Civil), B.Eng Civil, SACPCMP


Civil Engineering Construction and Consulting & Project Management


"Step by step with total commitment."

Lode Theunynck

head of customer experience  


High performing sales leader with 20+ years of experience in managing multi-million growth and development on a global scale of Container Terminal, Metallurgy and Mining markets.

"Stay curious."

Gunnar Kläschen

Senior Strategic Advisor Dipl.-Kfm.


Eighteen years experience of marketing and sales in different B2B business areas for mostly international companies.  

"A project is late one day at a time- Act Now!"

Rynard Brits

Mineral Resource Manager Pr.Sci.Nat / MSc Engineering Management


Ten years’ experience in hard rock OC mining and quarrying, underground stope mapping, conducting geological field studies, desktop studies and exploration. 

Eleanore Forner at Stark Resources

"Seek out new technologies. Decarbonize where you can. Always Optimize."

Eleanore Luise Forner

Principal - Lithium Pr. Eng. / B. Eng. Hons (Chem.)


Fourteen years experience as a process/project engineer, with a multi-industry career, starting in nuclear (Uranium and fluorochemicals), to mining and hydrometallurgy across various metals.

“Problems are for people who don’t seek solutions.”

Eugene Collins

Mineral Recovery Analyst Pr. Eng. / B. Eng. (Chem.)


4 years of experience in the mining and mineral processing environment with specific regard to beneficiation unit operations. 

“Be passionate about what you do.”

Sonja Schadeck

Techno - Economic Engineer – Lithium M. Sc. BA & Eng. (Mech.)


Six years of experience as a project engineer and sales manager with a focus on measurement technologies for various industries, including mining. Profound knowledge of ore sorting solutions for optimised bulk material handling.

“Innovation is the key to success.”

Johannes Hornung

Mineral Resources Engineer M.Sc.


Five years of experience in sales, mining research and academic lecturing with focus on digitalisation and automation in the mining and materials handling industry. Strong passion for mining and innovation.  

“Solutions speak louder than promises”

Clayton Duncan

Business Development Manager: Australia


Over 10 years experience in energy and mining, enabling companies through unique technologies, engineering services and managed workforce solutions. 

“If opportunity doesn’t knock, build a door.” – Milton Berle

Franko Terblanche

Proposals Engineer B.Eng Mech Eng


6 years of experience as a mechanical project engineer across 3 sectors. Namely Steel, modular process plants and Modular diamond sorting plants.

“Those who make no mistakes make nothing.”

Ryan Matthew Szabo

Project Manager: Australia BTech Mech Engineering


With over ten years experience in EPCM on both green and brown field projects within the mining sector. With emphasis on the implementation of recovery modules in the diamond mining sector.

"Consider the variables, prioritize the options, then Just Do It."

George Henry Read

Senior Technical Advisor Canada P.Geo


Over 38 years as an international diamond exploration and evaluation geologist working in Southern Africa, Mali, Canada, United States, Brazil, Australia and Greenland. I am familiar with diamond bulk sample plants. 

"Every challenge presents an opportunity to think creatively and critically."

Dr Zac Phillips

Head of Energy Finance PhD Pr.Chem.Eng


In excess of twenty-seven years’ experience in energy and finance, working for companies such as BP, Chevron, Merrill Lynch and ING Barings, where he undertook finance or finance related roles. 

James Derbyshire

Product Manager: DMS & RFID B.Eng (Chem)


Over 15 years’ experience in a processing environment with a focus on gravity separation processes (DMS, spirals and up flow classification as well as magnetic separation), floatation, specialised crushing and screening. 

"Your mountain is waiting, so get on your way" - Dr. Seuss

James Henry Ferreira

Process Manager MSc App Sc: Metallurgy / BSc Hons App Sc: Metallurgy / BSc Geology


Five years’ working experience in hard rock mining, quarrying and minerals processing industry, entailing mining and plant operations. 

“Find your niche and be the best at it!”

Bernard Fundikwa

Process Engineer BSc. (Hons) Metallurgical Engineering, BSc. (Hons) App Sc. Metallurgy


Five years experience in Engineering and Mining, working in production in a foundry setup and being involved in projects from initiation stage to execution in pressure vessel repair, froth flotation and process mineralogy.

"Our future success is directly proportional to our ability to understand, adopt and integrate new technology into our work."

Raymond Fourie

Process Engineer B.Eng Chem Eng


Four years working experience in the mining and minerals processing industry, entailing research and development management and design execution.

“Through curiosity and wonder, growth and progress is achieved.”

Marcel De Beer

Junior Process Engineer B.Eng Chem Eng


Qualified Chemical Engineer with some experience in the petroleum and oil industry. A greener future for the mining industry is my goal and the reason why I am working in the industry.


“The capacity to learn is a gift; The ability to learn is a skill; The willingness to learn is a choice.” - Brian Herbert

Jean-Pierre Smith

Director Stark Technologies B.Eng Mech Eng


Mechanical Engineer with vast experience in the mining and diamond sorting sector. Technical expertise is predominantly in the form of Project Management and Project Planning.

"If it was easy everyone would do it."

Hennie Du Plessis

Head of Product Development


32 years local and international experience in Radio Frequency (RF) Electronics in a wide variety of products.

"Think outside the box for new solutions."

Lourens De Villiers

Principal Mechanical Engineer B.Eng Mech Eng


Fifteen years of experience in engineering design, analysis, product development and fabrication.

“Make it simple, but significant.”

Reinald Liebenberg

Mechanical Design Engineer B.Eng Mech Eng


Three years of experience in mechanical design and development of prototype products with exposure to multiple fields.

"The road to success is always under construction." - Civil Wale

Nicholas Mark Lucas

Mechanical Design Engineer B.Eng Mech Eng


More than three years of experience in mechanical design, manufacturing and project management of mining equipment with a focus on the gold mining sector.

“Do the best you can until you know better. Then when you know better, do better.” -Maya Angelou

Claudia Rose Hannweg

Junior Mechanical Engineer B.Eng


Completed Grade 12 in 2015 at St Mary’s DSG in Pretoria. Highlights of schooling include being awarded a scholarship in high school.


"The best way to begin is just to start."

Willem Viljoen

Senior Project Engineer B.Tech Mech Eng


Nine years of mineral processing experience, with extensive experience in bulk material handling processes and sensor based sorting.  

"Don’t count the days, make the days count."

Andre De Lange

Project Engineer Ndip Mech Eng


More than 10 years Mechanical engineering and project management experience in the factory and mining industries, focused on material handling, mineral processing, equipment integration and manufacturing.

Mauritz Van Der Heever at Stark Resources

"Never accept failure, but learn from your mistakes."

Mauritz Van Der Heever

Project Coordinator


Ten years of experience in mining and metal industry with an extensive background in construction and project management in Africa. 

“A goal without a plan is just a wish"

Eduan De Langen

Electrical EngineerB.Eng Electr. Eng


Six years of electrical engineering experience in a heavy industrial environment, with comprehensive exposure to the mining and mineral processing.  

“By failing to plan you are only planning to fail.”

Wesley Dean Slabbert

Project Planner


Coming from modest beginnings as a fitter & turner apprentice with Otmar Machine Tools and growing within the engineering industry. 

“The way to achieve your own success is to be willing to help somebody else get it first.”

Ilse Scholtz

Cost Controller


A person with great experience and a great attitude. 

People & Culture

“We can’t help everyone, but everyone can help someone” – Ronald Reagan

Vanessa Mostert

Head of People and Culture BCom Hons IOP


Human Resources professional with over 8 years’ experience consulting in various industries. Passionate about people and processes.

Finance & Operations

"If you can imagine it, you can achieve it. If you can dream it, you can become it." -William Arthur Ward

Marius Engelbrecht

Operations Manager


More than 15 years’ experience in Finance and Human Resource Management, specialising in Tax and is an active member with the South African Institute of Taxation.

"If someone offers you an amazing opportunity and you’re not sure you can do it, say yes – then learn how to do it later."

Amanda Prinsloo

Senior Administration Manager


20 Years of HR/Payroll experience, administrative experience in employing Cross Border (DRC, Burkina Faso, Ghana, Guinea) as well as in South Africa. 

“The glass is half full.”

Jessica Suck

Office Coordinator / Assistance


More than 35 years of experience with people, administration, coordination and organisation.

Kelly Evans

Office Administrator


Many years of experience in a number of administrative functions including Financial, human resources, mobilisation, organisation.

"Form follows function."

Evelyn Engelhart

Brand Project Manager B.A. Industrial Design


Nine years+ in corporate design, visual communication and user experience design.  

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Locations worldwide

United Kingdom

Stark Ltd
Sovereign House,
Port Causeway
United Kingdom, CH62 4TP


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