Ngonidzashe Chimwani is a Senior Researcher in the Mining, Minerals, and Geomatics Engineering Department at UNISA, who holds a Ph.D. in Engineering (University of the Witwatersrand), an MBL (University of South Africa), and a B-Tech in Engineering (National University of Science and Technology). He is a C2 researcher, as rated by the National Research Foundation (NRF). Dr. Chimwani has received 11 awards throughout his career and has supervised several postgraduate students. His research focuses on optimising comminution circuits to achieve sustainable operations, as well as on sustainability and circular economies in the mining and other processing industries. The main focus is on the extraction of metals from low-grade ores and the processing of mineral waste dumps, using various strategies, including phytomining for reuse and remediation. In other processing industries other than mining, the drive is to achieve sustainable operations and promote circular economies.