previous arrow
next arrow

Our Team

Our team provides clients with access to highly experienced personnel who have experience in the Corporate, Operational, Technical, and Sales environment with particular emphasis on:

  • Education and Training Services
  • Exploration Activities
  • Geophysical Surveys
  • Resource Modelling and Estimation
  • Mine Management and Operations
  • Mining Engineering
  • Short-, Medium- and Long-Term Mine Planning, Design and Scheduling
  • Mine Ventilation Networks
  • Mine Water Distribution Networks
  • Technical Services
  • Resource and Reserve Competent Person Responsibilities
  • Metallurgy and Mineral Processing
  • Pre-Feasibility and Bankable Feasibility Projects
  • Project Management
  • Contracting/Contractor Management
  • Financial Modelling
  • Mine Closure
  • Business analysis/ Strategic Planning
  • HSEC/Risk

The team’s experience spans multiple commodities and types of operations, across a number of countries, and managing different cultural groups, often in the same country, with their most recent experiences being  the lead in project analysis for a major multi-national mining investment company.


Dennis Kattowitz
Group Managing Director

Managing Director of our Group of Companies, Dennis’ passion has been focused on technology and its application in mining, which he has continued to promote during his 30‐plus years in the industry. With mining and mineral resource management experience built up from his years in the South African deep level gold mines, Dennis has extended his portfolio to include roles such as Board membership and senior management, including Senior Technical Manager with Mitsubishi Development, General Manager for a Caterpillar dealer Joint Venture company, Chief Surveyor with Anglo American Coal, and Sales and Marketing Manager for a number of companies. Dennis brings a broad range of experience, including project management and implementation skills, beneficial to any company.


Fred Chitonga
GM - Europe, Africa, Middle East and WesternAsia

Fred has been involved in the minerals extractive industry for over 20 years  in various countries and organisations around the world, gaining international experience with major mining companies in optimising workflows and processes to locate, evaluate and exploit economic mineral deposits. As an experienced geologist, certified project manager and change agent, Fred excels at conducting geoscientific exercises to improve technical practices and manage risk in geoscientific simulations. Fred has experience in open pit, underground and consulting environments and is conversant in leading mining software including, Isatis, Datamine Studio, MineSight, MapInfo-Discover, ArcGIS, Leapfrog, acQuire, Fusion and Sirovision.

Fernando Linares Quiroa
GM - Latin America

Fernando has over 30 years of professional experience and more than 20 years as a resource geologist. With experience in operational and exploration functions working in underground and open pit mining, Fernando’s experience extends to epithermal, mesotérmales, VMS, MVT, copper molybdenum porphyry, copper and gold porphyry deposits.  He has also been extensively involved in exploration of basic metals in Peru, Chile, Colombia, Ecuador, Argentina and Canada. Fernando is an expert in geological and resource modeling, the implementation of quality assurance and control programs (QA/QC), geologic database administration and in the use of mining software such as GEMS, Leapfrog and Surpac.and South African (SAMREC) requirements for mineral resource reporting.

Hettie van Wyk
Training Manager

Hettie has been with the company from the start.  For many years she worked for a Tier 1 mining company in South Africa before emigrating to Australia. Hettie has had been exposed to the mining industry for over 30 years and has enjoyed the challenge of organising training events. 

Kathleen Body

Kathleen has had an extensive career assisting mining companies in the fields of Mineral Resources, Grade control and Sampling, either as an employee or consultant.  She has substantial experience in mineral evaluation from early stage exploration, production and reprocessing of waste materials.  As would be expected, Kathleen continuously maintains her knowledge and has run numerous courses and seminars in sampling, quality control, resource estimation and geostatistics.  She also covers mineral/metal extraction, financial valuation and risk assessment.  In addition to gold, she has extensive experience in other commodities and is a Qualified/Competent person, Project Lead or Supervising Principal in many of them.  As a French speaker, she is able to teach in French.

Steven Rupprecht

With an education in the US and South Africa, Steven brings a tremendous level of mining experience to the DEKA Group.  Involved in mining since obtaining his BSc Mining Engineering in 1986, Steven has progressed through the mining ranks and commodities of gold and coal, achieving Technical Director level.  He obtained his PhD in 2003.

Steven has also gained experience as a mining consultant and spent four years with CSIR as a Research Area Manager.  Steven now devotes his time and knowledge teaching young mining engineers the intricacies of mining.  His experience in the application of mining engineering on feasibility/pre-feasibility studies in numerous commodities, along with Project Management appointments and appointments as CP for various mining companies, attests to his subject matter knowledge.  Steven is also a serving Council member on the SAIMM.

Marta Sostre

Marta brings a wealth of geological knowledge to our team as well as a strong background in multiple mining software platforms.  With experience in the fields of geological modelling and mineral resource estimation, gained from working with a number of companies, her role in our company focuses on consulting, personnel development and training, which she has been engaged in doing since 2009.Marta speaks English and Spanish and has assisted mining software companies with the translation of their excellent software solutions from English into Spanish.

Charl Wiid

Charl joins our team with over then 40 years of mining experience behind him in inclusive of gold, platinum, chrome, copper and diamonds in underground, surface and coastal (mineral sands) environments. He is a qualified and accredited hard rock miner; risk assessor for geotechnical engineering; trainer and educator; and an assessor for outcomes-based education.

Apart from his substantial mining knowledge and expertise, he is also an Examiner and Assessor on behalf of the Chamber of Mines of South Africa for the underground proficiency of candidates for the COM Rock Mechanics Certificate.

With a wealth of experience working with mining companies in Africa, his last mining appointment as the Group Rock Mechanics Training Manager for a Tier 1 mining company before he took on an independent role in the industry.

Charl is considered an expert in the field of designing, implementing, and maintaining geotechnical engineering Codes of Practice for mining clients. 

Samuel Sibil

Samuel has a BSc in Geomatic Engineering and is currently busy completing his Masters.  He has been involved in manganese mining in Ghana and has taken up the challenge of self-development, with specific interest in the field of mining software. He is proficient in many aspects of Geovia Surpac, such as Geological Database Management, Resource Modelling and Estimation, Advanced Geostatistics, Advanced Solid Modelling, Open Pit Designs and Advanced Mine Surveying.

Samuel is also competent with ArcGIS, AutoCAD and other software products, which form the basis of his ability to teach these subjects.  His geomatics background enables him to also undertake survey work and training.  Samuel has been published as a co-author.

Eric Imbeah

Eric is a distinguished Geological Database Management systems & Quality Assurance Quality Control (QAQC) specialist. He has over 35 years mining industry experience and has worked for international mining houses, such as BHP Billiton, Anglo American, Newmont and AngloGold Ashanti. He has a rich multi commodity experience and brings with him a wealth of experience in Exploration and Mining data management, integration of data sources to modelling processes, quality control of geochemical assay data and fire assay laboratory processes.

He is passionate about training and has offered Geographic Information systems, QAQC and various earth science related Original Equipment Manufacturers (OEM) software courses across Exploration assets. He was the global exploration database representative for Newmont Ghana, where all Newmont data, worldwide, was brought to a common platform. His recent achievements includes being part of the Obuasi mine redevelopment team where he supervised the assay laboratory and ensured that all AngloGold Ashanti’s QAQC protocols are embedded into the operations. Obuasi mine was successfully brought from a care and maintenance state into a modern and mechanized mine, with gold production commencing in 2019.

Eric compiled and indexed all AngloGold Ashanti's Mali geoscience datasets, namely Sadiola and Yatela Gold mines, prior to their sale to Allied Gold in 2020.

Alex Nortje

With a B.Comm in Accounting, Economics, and Business Economics, a MBL, and Post Graduate Diploma in Financial coupled with his registration as an Accredited Financial Planner and member of the Financial Planners Institute of SA, Alex is well versed in all matter financial. 

Apart from his many years employed in financial institutions, Alex has had the pleasure of tutoring at several universities and for companies requiring specialised and focused training.   

Alex brings his knowledge and experience to our company and is available to help any organisation develop the financial capabilities of its staff.

Bob Hatherly

Bob has 40 years of experience in mining and exploration geology and has been a consulting geologist for more than half of that time, specialising in coal exploration during the last decade. His key strengths are in the implementation and complete management of exploration projects, and the on-site training of graduate exploration geologists.  He has been involved in exploration projects throughout Africa, as well as Turkey.
Bob originated the compliance related audit service, Sample Trail Audit (STA), now used by Venmyn Deloitte. STA is specifically designed to be implemented on exploration and mining projects in order to monitor the sampling standards and QA/QC procedures of field geologists and technicians.

Dr Andrew W Cox

Specialising in the energy and environmental sectors, Andrew has been providing consulting and training throughout the world and is well known for his published articles and papers relating to coal technologies.  His recent consultancy work has involved project and background studies covering mine closures/reclamation projects; port developments in Europe and Russia; climate change issues; economic appraisals and evaluations of coal to liquids technologies; surface coal mining projects; power plant fuel and design evaluations; and a global market survey of virtual reality training systems in the mining sector.

Andrew was also Editor of the monthly newsletter UK Coal Review in the 90s. The newsletter examined all aspects of the UK coal sector, including coal production in underground and surface mines; UK power station sector; coal imports and transportation; corporate and related policy developments. In 2000 Dr Cox co-authored a book “Digging Up Trouble” [with Huw Beynon and Ray Hudson], examining the environmental, social, economic and political issues surrounding the UK opencast coal mining sector.  Since the late 80s Dr Cox has contributed to a wide range of energy and environmental publications.

Kevin Wright

With over 40 years developing and managing mining operations, and 16 years has been in tropical high rainfall environments, Kevin’s background includes exploration programmes, resource estimation, metallurgical analysis, pilot test work, mine and process plant design and construction management.  He has been hands-on in underground and open pit mines applying gravity, heap leach, flotation, CIP/CIL, and bacterial oxidation recovery methods. With exposure across multiple commodities that include lead, zinc, copper, tin, and iron, coal, aluminium and industrial minerals, Kevin has “honed” his experience in regions such as Central and South America, the Caribbean, Southeast and Central Asia, Russia, Scandinavia, Eastern Europe and North America.

Francois Fourie

Francois has more than 20 years' experience working as a hydrogeologist and hydrogeophysicist. His work experience includes periods of employment in both the consulting industry and at academic institutions. Working as a consultant, he gained experience with various components of groundwater projects, mostly done for the mining and utilities industries. This included project planning and management, client liaison, field work, data processing and interpretation, and reporting.

His experience as an academic has allowed him to acquire expertise in the development of methodologies to answer specific research questions related to groundwater. This dual exposure to the worlds of consulting and academia has afforded him unique skills for problem solving in the fields of hydrogeology and hydrogeophysics. He has been teaching hydrogeophysics at post-graduate level since 1998.