Guillem Bernat, founder and CEO of Rapita Systems Ltd. is a world renowned expert on worst-case execution time analysis, probabilistic timing analysis, scheduling algorithms and schedulability analysis. He was formerly a lecturer at the Computer Science Department at the University of York, in the UK. His early work on probabilistic timing analysis has led to the publication of two seminal papers in the area, in particular in the application of the theory of copulas.

He is also one of the architects of the RapiTime tool-set. Guillem Bernat is one of the founders of the International Workshop on WCET analysis that meets annually as a satellite event of the ECRTS conference. Dr. Bernat has a PhD in schedulability analysis from the Universitat de les Illes Balears, Spain and has published more than 80 papers in international conferences and journals.