Joined Sanger in 2004, working initially on Y-chromosomal diversity, including involvement in the Genographic project. Subsequently, focused more on identifying signatures of positive selection in the human genome. Since 2008, I have concentrated on applying new sequencing technology to address human evolution and population genetics questions, e.g. directly measuring Y mutation rate. Involved in the 1000 Genomes Project, including Y-chromosomal diversity, a genome-wide scan for positive selection, identifying disease variants in the general population, and functional prediction of the consequences of variants. Also coordinate two major team projects for the new quinquennium: Native American and Himalayan population genetics studies.