Haris is skilled in systems engineering due to his many years of experience as a SysAdmin in the Maritime and is a Security Expert with over 15 years of experience in the IT and Cyber Security industry. He achieved 1st place in the Cyber-warfare military exercise of Greece (Panoptis) in 2017 and has been constantly participating in cybersecurity competitions all over the world. He has collaborated with the Greek Army to design the future Cyber Warfare exercises of Greece for 2018 and 2019. Haris was in the coaching group of the European Cyber Security Challenge 2017/2018 and in the management group for 2019/2020 to help and educate young cybersecurity talents. Also, he is an EC-Council certified trainer. 

Haris is an experienced professional in Networking and Software Architecture. In 2017 he founded Hack The Box. The company has scaled to 180+ employees and half a million users within the first three years of operation. He actively designs Hack The Box products and infrastructure, consults and manages the team across all topics, and stays up to date with the latest Cyber Security Tactics, Techniques, and Procedures. His vision with Hack The Box and the newly launched Hack The Box Academy is to make Cyber Security Training accessible to everyone via a gamified, fun, and innovative environment.