Dimitrios Letsios has very recently joined Imperial College as a postdoctoral researcher. Previously, he has served as a postdoctoral researcher with teaching duties at the University of Nice – Sophia Antipolis (2015-2016), at the Technical University of Munich (2014-2015) and at University Pierre and Marie Curie (2013-2014). Before, he obtained his PhD degree at the University of Evry in Paris (2010-2013) and his MSc and BSc degrees at Athens University of Economics and Business (2004-2010). His research interests lie in theoretical computer science and, more specifically, the design of algorithms with proven performance guarantees (approximation algorithms). He has mainly worked on scheduling problems taking into account the energy consumption and communication costs of computing systems.