Tzachi Hagai is a senior lecturer in the School of Molecular Cell Biology & Biotechnology since 2019. During his PhD he has used computational tools in bioinformatics and modelling to study the regulation and evolution of protein ubiquitination. In his postdoctoral studies, he has focused on host-pathogen co-evolution. In the first part of his postdoc, he has studied the pathogen side, asking how viruses evolved to interact with host proteins, using virological replication assays and protein network analysis. In the second part of his postdoctoral work, he has focused on the evolution of host immune response in mammals, using comparative genomics, single-cell transcriptomics and in vitro immune stimulation assays.