Cybersecurity strategy & risk
Architecting enterprise security strategies and enabling informed risk choices that support business outcomes.
Cybersecurity · Technology · Leadership
Dr. John Iliadis
Cybersecurity Executive & Technology Leader
I lead technology infrastructure and cyber operations with a focus on resilient digital services, informed risk decisions and business-aligned security.
Athens, Greece
20+ years
Technology and cybersecurity experience
IT Infrastructure Director
TEIRESIAS S.A. · since 2019
PhD · MSc in Information Security
University of the Aegean · Royal Holloway College, University of London
CISSP · CISM · ITIL · C|CISO
Academic and professional credentials
Leadership focus
Connecting secure operations with business priorities
Across more than two decades in technology and information security, my work has combined operational leadership, technical change and the development of people and teams.
Infrastructure & cyber operations
Leading technology infrastructure, architecture and cyber operations to support resilient business services.
Technology transformation
Experience spans infrastructure change, cloud migration and initiatives such as zero-trust security models.
People & business alignment
Developing multidisciplinary teams, mentoring direct reports and aligning technology decisions with business goals.
Experience & education
A career across infrastructure, research and leadership
Professional experience
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IT Infrastructure Director
TEIRESIAS S.A. · Athens, Greece
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IT Infrastructure Assistant Director
TEIRESIAS S.A. · Athens, Greece
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Network Security Administrator
TEIRESIAS S.A. · Athens, Greece
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R&D Project Coordinator
Intrasoft International · Athens, Greece
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Teaching Associate
Department of Informatics, Technological Educational Institute of Athens · Greece
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Research Associate
Laboratory of Information & Communication Systems Security, University of the Aegean · Greece
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System Administrator
Department of Informatics, Technological Educational Institute of Athens · Greece
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Technical Support
Self-employed · Small and medium businesses · Athens, Greece
Education & selected credentials
Management & Leadership
Chartered Management Institute · CMgr MCMI
Negotiations
Athens University of Economics and Business
Business Administration
University of the Aegean
PhD, Information & Communication Systems Security
University of the Aegean
MSc, Information Security
Royal Holloway College, University of London
BSc, Computer Engineering
Technological Educational Institute of Athens
Professional credentials include CISSP, CISM, CRISC, C|CISO, ISSMP, CCSP, CCSK, CSSLP, SSCP, COBIT, ITIL and DPO Executive.
Professional service & recognition
Contributing to the cybersecurity community
2025–present
Chair of the Audit Committee
ISC2 Hellenic Chapter
2023–2025
President of the Board of Directors
2025–present
Advisory Board Member
MSc in Law and Information & Communication Technologies, University of Piraeus.
Recognition
Awards & distinctions
- ISC2 Chapter Recognition Award for the EMEA Region (2026).
- Best Use of Customer Engagement Platform (2026), BITE Awards.
- Platinum CyberSecurity Leadership Award (2025), Boussias; award achievements video.
- Gold CyberSecurity Leadership Award (2025), Boussias; award achievements video.
- Global Achievement Award for the EMEA Region (2024), ISC2; award achievements video.
- Gold CyberSecurity Leadership Award (2024), Boussias; award achievements video and ISC2 article.
- Gold CyberSecurity Awareness Award (2023), Boussias; award achievements video.
- Gold CyberSecurity Leadership Award (2023), Boussias; award achievements video.
- Voted among Greece’s 50 most impactful cybersecurity professionals (2023): credential · Cyber Security 50 Powerlist.
- Cybersecurity Awareness Award (2022), Boussias.
- Global Achievement Award for the EMEA Region (2022), ISC2; celebration video.
- Emerald Literati Club Highly Commended Award (2004), Best Research Paper: “Towards Secure Sealing of Privacy Policies”.
- David Lindsay Memorial Prize (1999), British Computer Society award for best MSc thesis, Royal Holloway College, University of London.