From a security engineer to presales and consulting, enterprise security architecture and education. Matija has been in security for almost 15 years now, in various roles and various organisations with various responsibilities, from a user through an integrator to a vendor. He likes to joke that it made him ''jack of all trades but master of none'' (although the continuation of that saying is very indicative). But hey, as an SF author Robert Heinlen once wrote, ''specialization is for insects".