Executive profile
Dr. John Iliadis — Cybersecurity & Technology Executive
IT Infrastructure Director at TEIRESIAS S.A. · Athens, Greece · 20+ years leading cyber operations, resilient infrastructure and security strategy for mission-critical financial services.
Areas of expertise
Technology leadership (CIO)
NIS2 & EU cyber governance
Cyber risk & GRC
Digital transformation
Executive impact
- 37% improvement in service availability — resilience and continuity programmes across mission-critical financial infrastructure.
- 85% improvement in disaster recovery readiness.
- Zero-downtime infrastructure migration for tens of thousands of users.
- Designed and established an outsourced Security Operations Centre with custom SOC use cases for incident response.
- Architected a zero-trust security transition across enterprise infrastructure.
- Leads a team of 18 professionals delivering cyber operations and 24/7 service resilience.
Executive profile at a glance
Credentials & education
- PhD in Information & Communication Systems Security, University of the Aegean; MSc, Royal Holloway, University of London.
- Certifications: CISSP, CISM, CRISC, C|CISO, CCSP, ISSMP, COBIT, ITIL, Chartered Manager (CMgr MCMI), DPO Executive.
- Board & community: ISC2 Hellenic Chapter — Board Member, President (2023–2025) and Chair of the Audit Committee; Advisory Board, MSc Law & ICT, University of Piraeus.