Aleksandar Ostojić received his PhD from the Faculty of Biology, University of Belgrade. He is the full professor retired at the Faculty of Science, Department of Biology and Ecology, University of Kragujevac, where he teaches courses in the field of Ecology and Environmental protection. Aleksandar Ostojić is a member of several national and international professional bodies and he was participant in several national and international research projects. He has published more than 130 research papers in national and international journals, conference proceedings and books. He is the mentor of one Doctoral thesis, 65 Master thesis and commission member of 163 Master and 8 Doctoral theses. Aleksandar Ostojić is project manager of one international and one domestic research project and participant in several national and international research projects.