Xavier Mertens is a freelance cyber security consultant based in Belgium. His daily job focuses on protecting his customers assets by applying "defensive" security (incident handling, forensics, log management, SIEM, security visualisation, OSINT) but also "offensive" security (pentesting). However, his preferred domain is playing on the Blue Team side. Besides his daily job, Xavier is also a security blogger (https://blog.rootshell.be), a SANS Internet Storm Center handler (https://isc.sans.edu) and co-organizer of the BruCON security conference (https://www.brucon.org).