Aleksander J. Mendecki graduated with a PhD in Seismology from the Silesian University of Technology in Poland in 1981, where he also worked as an Assistant Professor. In 1985, he became the Head of the Seismology Department at the Anglo American Corporation in South Africa. From 1991, he was appointed as the Managing Director and the Head of Research at ISS International Limited (ISSI) and in 1994, Dr. Mendecki also worked as the Managing Director of ISS Pacific (ISSP). In 2010, he founded the Institute of Mine Seismology in South Africa and in Australia, and with the acquisition of both ISSI and ISSP, he became their 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. Dr. Mendecki is the editor and the main author of the book Seismic Monitoring in Mines published by Chapman & Hall, London, 1997 and the author of the book Mine Seismology Reference Book: Seismic Hazard published in 2016. He published a number of papers in International Journals and presented and published keynote lectures resulting from the International Symposia on Rockburst and Seismicity in Mines, Kingston, Canada, in 1993, in Krakow, Poland, in 1997, in Johannesburg, South Africa, in 2000, and in Dalian, China, 2009 in St Petersburg, Russia, in 2012 and in Santiago de Chile, Chile in 2017.