Directors and Management Team
Dr Aleksander J. Mendecki: Chairman and Head of Research
Aleksander graduated from the Silesian University of Technology in Poland with a PhD in seismology in 1981 where he also worked as an Assistant Professor. In 1985 he took a position as a Head of the Seismology at Anglo American Co-orporation in South Africa. From 1991 he was appointed the Managing Director and Head of Research at ISS International Limited (ISSI) and from 1994 also the Managing Director of ISS Pacific (ISSP). In 2010 he founded the Institute of Mine Seismology in Australia and in South Africa, which acquired both ISSI and ISSP, and became its Chairman and Head of Research.
His main areas of expertise are: monitoring seismic rock mass response to mining, quantification of seismic sources and near-source ground motion, deterministic and probabilistic seismic hazard assessment in mines, and the application of quantitative seismology to rock mass stability. He is the editor and the main author of the book “Seismic Monitoring in Mines” published by Chapman and Hall in 1997 in London.
Dr Ernest Lötter: Managing Director and Head of Computational Seismology
Ernest has a PhD in Mathematics from University of Stellenbosch in South Africa, focusing on the study of towers of algebraic function fields. After finishing his degree, he joined ISS International in 2006. He started on location problems, using ray-tracing to perform cave front tracking. Thereafter he took over the development of the seismological processing software, developed it as an extensible platform for providing seismological services, and worked on seismic source characterisation. As part of the research and development programme, he has written kinematic modelling software, worked on seismic source directivity characterisation and enjoys developing massively parallel codes to solve computationally hard problems.
Since moving to Australia in 2012, Ernest has been working on the next generation seismological processing and visualisation software, and looks forward to extracting more useful information from seismic data in a routine manner than the classical models allow for, in particular with respect to exploiting continuous data and directivity effects. More recently he is looking at short term hazard and ground motion hazard.
Dr Dmitriy Malovichko: Director and Head of Applied Seismology
Dmitriy has a degree of candidate of phys.-math. sciences (~PhD) from the Institute of Physics of the Earth (Moscow, Russia). Between 2000 and 2009 he worked at the Mining Institute (Perm, Russia) and was involved in regional seismic monitoring, local seismic observations in potash mines and karst caves, and engineering seismology projects. In 2009 he joined ISS International (South Africa) which later transformed into the Institute of Mine Seismology (Australia, South Africa and Canada). He is responsible for seismological services for mines (processing and interpretation of seismicity, investigation of large/damaging seismic events) and is involved in research projects in mine seismology.
Dmitriy is interested in inferring information about seismic sources from seismic signals, the integration of seismic monitoring data with stress modelling and the assessment of seismic and ground motion hazard associated with planned mining.
Dr Gerrit Olivier: Director and Head of Applied Geophysics
Gerrit has a PhD in geophysics and seismology from the Université Grenoble Alpes (France), focusing on the use of seismic interferometry to image and monitor mining environments. Since he joined IMS in 2011, he has worked on processing ambient seismic noise and signals from active seismic sources recorded in underground mines to monitor the rock mass response to mining. He also pioneered the use of passive seismic methods to image and monitor tailings dams. He has been working for the Institute of Mine Seismology since 2011 and was appointed as head of IMS’ applied geophysics group in 2014, where he is responsible for developing and growing the market for mine applied geophysics products and services.
Gerrit enjoys researching state-of-the-art seismological methods used in crustal seismology and volcanology and adapting these for the mining industry, such as the use of ambient noise tomography for mineral exploration.
Errol de Kock: Director and Head of System Engineering
Errol has a MSc in Physics and Electronics from Rhodes University. After more than 10 years in the military electronics field he joined ISS International in 1991. He has worked on the engineering side of the ISS product range especially in embedded software development. For many years he has installed and commissioned ISS systems around the world, and as a result has a wealth of experience in the planning and support of mine seismic monitoring systems and their integration with other geotechnical systems at customer sites.
Frans Cronje: Director and Head of Technical Services
Frans has a NDIP Electrical Engineering (Light Current) from the Central University of Technology in South Africa. He started working for ISS International at the end of 1999 taking responsibility for installations and maintenance of the seismic systems installed in South Africa. At the end of 2002 he was relocated and appointed as the Manager of ISS Pacific Pty Ltd, Australia until the end of 2007. After relocating back to South Africa, he started to manage the Technical Services departments for both ISS International and ISS Pacific.
At the beginning of 2011, he moved to our Hobart office, managing both our Technical Services department as well as IMS’s Production Facility in Australia.
Gareth Goldswain: Director and Head of System Development
Gareth obtained his MSc in Electronic Engineering from the University of Cape Town in South Africa, with a background in mixed-signal electronics, instrumentation & control, signal processing and intelligent systems.
In 2006 he started working at ISS International as System Engineer, Developer and then Manager where his core focus areas were: analogue & digital hardware design, embedded systems and industrial communications & telemetry. Gareth has led the development of the IMS seismic monitoring system since its inception in 2010.
In 2016 Gareth started his PhD candidature at the University of Tasmania, where his research focuses on signal processing techniques specifically relating to active seismic monitoring.
Kobus Franken: Director and Head of Finance
Kobus has a B.Com Hon in Economics from the University of the Orange Free State in South Africa. He is employed since 1990 at ISS International where he headed the Finance and Administration Department and was also responsible for the Finance and Administration of ISS Pacific Pty Ltd since 1994.
Olaf Goldbach: Business Development Manager (Africa)
Olaf obtained his MSc degree in Geophysics from the University of Witwatersrand in South Africa in 1990 whereafter he joined the Chamber of Mines Research Organisation (COMRO). During his 16-year career at COMRO (and later CSIR Miningtek) he became involved in a number of geophysics, mining and rock mechanics-related research projects. His primary interest was seismology and he developed his expertise in the field of mine seismic monitoring.
Olaf also spent five years at Snowden Mining Industry Consultants in Johannesburg where he developed his commercial skills. He joined IMS in August 2011 as the Business Development Manager. His responsibilities are to develop IMS’s client base in Africa and to provide routine seismological services to customers in Africa.
Dr Daryl Rebuli: Director and General Manager of IMS Canada
Daryl received his PhD in Applied Nuclear Physics from the University of the Witwatersrand (South Africa) in 2003. He joined ISS International in 2005 where he managed the seismological services team in South Africa. He also undertook studies involving seismicity in caving and open-pit environments.
From 2009 until 2014 Daryl was involved in hazard assessment studies for deep gold mines in South Africa and in research projects developing methods of improving short term hazard assessments. Daryl moved to Canada in 2015 where he is currently the general manager of IMS Canada.
Jacques Gerber: Manager and Head of Seismological Services (Africa)
Jacques has an MSc in Applied Physics from the Nelson Mandela Metropolitan University in South Africa. Since joining IMS in 2012, he has been involved in various research projects focusing on assimilation of seismic data with numerical rockmass modelling.
He currently manages the seismological services group in South Africa and is also involved in providing routine seismological services to the gold industry.
Cornel du Toit: Manager and Head of Seismic Data Processing
Cornel has an MSc in Mathematical Statistics from the University of Stellenbosch in South Africa. From 2005, he has worked at ISS International focusing mostly on seismic hazard and various location techniques. He also worked on the statistical aspects used in the data processing department.
Since 2012, Cornel has been working intensively on the automatic processing of waveforms and is currently managing the global data processing service.
Dolf Bredenkamp: Manager and Head of Technical Services (Africa)
He joined ISSI in 2006 as part of the System Engineering team, where he applied his interests in modern communication technologies as well as digital and analogue electronics. He was involved in high-level and detail design of hardware and firmware for the IMS seismic data acquisition and supporting systems. Since 2014, Dolf is also responsible for IMS Africa’s manufacturing and technical services division.