Greece’s cybersecurity landscape reflects its role as a critical junction between European finance, maritime infrastructure, government institutions, and global commerce. As digital transformation accelerates across banking, energy, telecommunications, and public services, security leaders are responsible not only for protecting sensitive systems but for enabling resilient, compliant, and trusted digital operations. The leaders below represent the professionals shaping Greece’s cybersecurity posture at both national and enterprise levels.
Alexandros Belsis – Chief Information Security Officer, DIAS Interbanking Systems SA
Alexandros Belsis brings more than 25 years of information security leadership experience to DIAS Interbanking Systems, Greece’s core financial transaction infrastructure. He has led complex security initiatives across regulated environments, implementing controls that protect national payment ecosystems. As a founding board member of the Hellenic chapter of ISC2, he also contributes to advancing professional cybersecurity standards across Greece.
Vasileios Alexiou – Chief Information Security Officer, Hellenic Parliament
Vasileios Alexiou leads cybersecurity strategy for the Hellenic Parliament, securing critical government infrastructure and legislative systems. With over two decades of operational and security leadership experience, he specializes in risk management, incident response, and aligning cybersecurity initiatives with institutional objectives. His work helps protect democratic processes while embedding security awareness and resilience into government operations.
Costas Chousiadis – Group Chief Information Security Officer, Motor Oil
Costas Chousiadis oversees cybersecurity strategy for Motor Oil, one of Greece’s largest energy organizations operating critical infrastructure. With more than 25 years of experience, he focuses on integrating governance, risk management, threat-informed defense, and regulatory compliance into enterprise operations. His leadership helps ensure cybersecurity supports business continuity, digital transformation, and operational resilience across industrial environments.
Vasilis Kouktzoglou – Group Chief Information Security Officer, Fourlis Group of Companies
Vasilis Kouktzoglou leads cybersecurity and data protection strategy across the Fourlis Group’s multinational retail and commercial operations. His expertise spans information security management, privacy governance, and enterprise risk protection. In addition to operational leadership, he has contributed to international research and publications on critical infrastructure protection and IT risk assessment, helping advance cybersecurity thought leadership beyond his organization.
Georgios Raikos – Chief Information Security Officer, TicTac S.A.
Georgios Raikos serves as Chief Information Security Officer at TicTac S.A., focusing on governance, risk, and compliance initiatives aligned with evolving European regulatory frameworks such as NIS2 and ISO 27001. With more than 25 years of experience spanning global organizations including IBM and major financial institutions, he brings deep expertise in enterprise security governance, risk management, and cybersecurity program leadership.
Angelos Varthalitis – Chief Information Security Officer, Ovivio NL
Angelos Varthalitis leads cybersecurity strategy at Ovivio NL, building security programs that enable business growth while protecting enterprise platforms. With over 20 years of leadership experience, he has designed enterprise SOC operations, zero trust architectures, and compliance frameworks supporting regulated and cloud-driven environments. His leadership emphasizes aligning cybersecurity investments with measurable business outcomes and organizational resilience.
Ilias Spyridon Efthymiopoulos – Chief Information Security Officer, Instashop
Ilias Spyridon Efthymiopoulos leads cybersecurity governance at Instashop, part of Delivery Hero’s global commerce ecosystem. With a doctorate in cybersecurity, he has built enterprise security programs achieving major international certifications including ISO 27001 and SOC 2. His leadership strengthens global operational resilience while helping secure platforms serving millions of users across international markets and digital commerce environments.
Zisis Ziogas – Chief Information Security Officer, Zepos and Yannopoulos
Zisis Ziogas oversees cybersecurity strategy for Zepos and Yannopoulos, one of Greece’s leading law firms. His work focuses on protecting sensitive legal data, ensuring regulatory compliance, and implementing robust ISO 27001 security frameworks. By aligning cybersecurity with legal confidentiality requirements and operational resilience, he helps safeguard client trust in highly sensitive professional services environments.
Strengthening Greece’s Cybersecurity Leadership Across Critical Sectors
Greece’s cybersecurity leaders play an essential role in protecting financial systems, government institutions, legal services, and industrial infrastructure. Their work ensures resilience in an increasingly complex threat environment while enabling secure innovation and digital growth. To explore how cybersecurity leadership is evolving across other regions, continue with our Iceland cybersecurity leadership spotlight.