John is an accomplished professional with more than 20 years of experience in enabling cyber-resilient services for thousands of users, spearheading digital infrastructure operations and delivering complex changes.

His proven professional track record has been diverse; conducting basic and applied research on Information Security, developing software, performing system, network and security administration of financial IT infrastructures, designing security architectures and conducting information risk management. 

 He is currently leading the IT Infrastructure Business Unit at TEIRESIAS S.A., and is also currently serving as President of (ISC)2 Hellenic Chapter.