This document advertises a masterclass on cyber security in defence to be held on March 18, 2015 in central London. The masterclass will address current cyber security issues and challenges in defence organizations, how to identify threats and strengthen security. It will also explore the risks of using mobile devices and how to combat cyber threats. Attendees will learn about implementing cybersecurity frameworks and using security metrics. Discounts are available for registering by certain dates. The masterclass will be led by Laszlo, an expert in information security, cyber security and IT management with over 15 years experience advising defence organizations.