Josep Torrellas is the Saburo Muroga Professor of Computer Science at the University of Illinois at Urbana-Champaign. He leads the Center for Programmable Extreme-Scale Computing, a center focused on architectures for extreme energy and power efficiency. He has been the director of the Intel-Illinois Parallelism Center (I2PC), a center created by Intel to advance parallel computing. He has made contributions to parallel computer architecture in the areas of shared memory multiprocessor organizations, cache hierarchies and coherence protocols, thread-level speculation, and hardware and software reliability. He is a Fellow of IEEE and ACM. He received the 2015 IEEE CS Technical Achievement Award.