Dr. Leonid A. Kurdachenko is a Distinguished Professor in the Department of Geometry and Algebra of Oles Honchar Dnipro National University. He is one of the most productive group theorists. His list of publications consists of more than 250 journal articles published in major mathematics journals in many countries around the globe. He is an author of more than a dozen books published by such prestigious publishers as John Wiley and Sons (USA), Birkhäuser (Swiss), Word Scientific (United Kingdom), and others. He served as an invited speaker and visiting professor at many international conferences and universities. His research activities have been supported by several prestigious international grants.