Omar Benjelloun is currently a postdoc in the Stanford InfoLab, working hard on tough data management questions such as: "Where does uncertainty come from?" (TRIO project) or: "Are we who the data says we are?" (SERF project). Omar did his PhD in Computer science at INRIA, France, developing Active XML, a framework for distributed data management based on XML and Web Services. Previously, Omar worked as a software developer, for the Klee Group (a french "E-business solutions provider"), INRIA, and the French Navy (because he had to). He also holds an engineering degree in telecommunications from Telecom Paris (ENST).