Johannes Holzer is Senior IT Architekt at NTS Netzwerk Telekom Service AG. He joined NTS in 2010 and is based in Vienna. Johannes is responsible for the entire range of Security Solutions and has over 20 years industry experience, much of it in IT-Security, in particular Network Security. He graduated from Graz and Vienna University with a Master´s Degree in Technical Physics. Previously, Johannes worked for IBM and Nokia Networks. Currently, Johannes is responsible for Security projects dealing with Critical Infrastructure and Network-Segmentation.