Shalev Ben-David was a QuICS Hartree Postdoctoral Fellow from 2017-18. His research interests include classical and quantum complexity theory. He studies concrete models of complexity, such as query and communication complexity, with the hope of gaining insight into when quantum algorithms provide an advantage over classical ones. He received his PhD in computer science from the Massachusetts Institute of Technology in 2017. Following his postdoctoral work at QuICS, he joined the University of Waterloo as an Assistant Professor in the Cheriton School of Computer Science.