This document is a letter from Vasilis Katos, an associate professor at the Democritus University of Thrace in Greece. The letter confirms that Michail Lampeas participated in the "PANOPTIS" and "CYBERPROTECTOR 2014" national cyber defense exercises with the information security team of the Department of Electrical and Computer Engineering at Democritus University of Thrace. The letter provides confirmation of Michail Lampeas' participation on these cybersecurity exercises with the university's information security team.