I am a bioinformatician by training with a strong interest in the evolutionary processes that shape microbial and viral genomes. Viruses are central players in microbial communities and viruses also have a major effect on communities of eukaryotic organisms. This interaction has important consequences for the evolution of cellular organisms. We now have the technology to measure the genetic content of communities at high resolution and we can infer which organisms with which detailed genome organization they contain, including all community members - eukaryotes, prokaryotes, and viruses. In my research group, we develop methods for the reconstruction of genomes and their evolutionary histories and gain biological insights by analyzing data with these methods. Specifically, we develop and apply approaches (i) to reconstruct viruses from metagenomic and metatranscriptomic data and (ii) to infer microbial population genetic processes from genomic and metagenomic data.