Bio:
I'm an allround network- and system administrator/architect at KPN where I take care of some of the bigger web destinations in the Netherlands. Most of our customers still use proprietary java/tomcat based CMS's but with me as a self appointed Drupal evangelist within the company Drupal is slowly making it's way up.
I also use and promote Varnish Cache, a modern open source reverse proxy cache package and have been advocating Linux for over a decade.
I maintain the Purge module that integrates a bunch of reverse proxy caches like Varnish, Squid and Nginx with Drupal. I was also member of the core organizing team of the DrupalJam, the dutch Drupalcamp.
I have basic knowledge of the Spanish language but I'll fall back on English when giving presentations.