I'm a CISCO CCNA with specialization on Cisco Unified Computing solutions.
Currently based in Italy where I work as Field Engineer on the whole range of Unified Computing and Unified Communication infrastructures and their common ground implementations, which require knowledge of the CISCO VoIP infrastructures, routing and switching (on both Catalyst and Nexus families), and am working to better myself on wireless networks and perimeter security. I'd say I still have minimal knowledge on all the fields but have very helpful (and knowledgeable) friends who are always keen to help (as the members of the amazing Linux community are).
I've got a deep understanding of the Microsoft end-user client and currently very intrigued by the potential of the Linux systems, especially the Ubuntu and SuSe distros (on which I am a proud neubee :) ).
I'm not a Microsoft basher though, I admire the work and effort they put in all of their solutions and I am certain there is tons to learn, especially in the new Windows 8 infrastructures (both desktop and mobile).
I intend to get a Nokia Lumia 920 soon, for example :)