Dr. Leszek Marcinkowski is an associate professor of applied mathematics at the Faculty of Mathematics, Informatics, and Mechanics, University of Warsaw. He obtained his MSc degree in 1994, his Ph.D. degree in 2000, and his habilitation in 2010 from the University of Warsaw. All degrees were obtained with distinctions. His Ph.D. thesis was on parallel solvers for partial differential equations discretizations. Later he was a post-doctoral fellow in the Department of Computer Science of the University of Colorado at Boulder, USA. He visited many foreign institutions, including the University of Colorado, Lawrence Livermore National Laboratory, and the University of Bergen, for shorter research visits. His research areas are focused on discretization methods and parallel solvers for partial differential equations. In particular, he is interested in discretizations built on nonmatching grids and domain decomposition methods.