The telecommunications and 5G infrastructure sectors are at the forefront of the next wave of digital transformation, connecting billions of devices and enabling critical services that power economies worldwide. With the rise of open networks, cloud-based communication, and increasingly sophisticated cyber threats, organizations in this space face unique security challenges. At the helm of defending these critical networks are cybersecurity leaders who combine technical expertise with strategic vision, ensuring that innovation does not come at the cost of safety or resilience. Here, we highlight four CISOs who are shaping the future of secure telecommunications and 5G infrastructure.
Ruslan Vdovichenko – Chief Information Security Officer, Telco Industry
Ruslan Vdovichenko brings over a decade of international experience across Azerbaijan’s banking sector and Kazakhstan’s telecommunications market. As CISO, he focuses on converting risk-based thinking into practical, scalable security solutions for complex enterprises. With a background in engineering high-assurance architectures and building full-stack security functions from the ground up, Ruslan leads with a pragmatic, competence-driven approach, establishing centers of excellence and making security a genuine enabler of business performance. His work exemplifies how a global perspective and operational rigor can strengthen the foundation of rapidly evolving networks.
Catherine “Dd” Budiharto – Customer Security Officer, Microsoft
With over 20 years of experience in information security, Catherine Budiharto has shaped cybersecurity programs across critical infrastructure and enterprise environments. Her work spans M&A support, cloud security transformation, and organizational cybersecurity resilience. Catherine’s strategic approach emphasizes partnering with business and technology teams to design actionable, high-impact security programs. From advising CEOs and CISOs to implementing policies and practices at multinational organizations, she demonstrates how cybersecurity leadership can align seamlessly with business objectives while advancing industry-wide standards.
Cathleen Dwyer – CISO, Verizon Corporate Functions
Cathleen Dwyer has spent nearly a decade at Verizon, leading cybersecurity initiatives across corporate and consumer functions. Her career also includes transformative roles at Dell Technologies and Lockheed Martin, where she focused on global security programs, cross-functional leadership, and performance-driven cybersecurity strategies. Cathleen’s work is defined by building strong relationships, aligning cybersecurity with business objectives, and driving organizational resilience. She exemplifies the impact that a collaborative, business-aware approach to cybersecurity can have on large-scale, mission-critical networks.
Jonathan Symes – Owner, Advisor & vCISO, Cyber4Site
Recognized as a Top Ten CISO in APAC in 2023 by Cyber Magazine, Jonathan Symes combines experience from military special operations to executive roles in global corporations. He brings extensive expertise in information security, risk management, incident response, cyber resilience, and enterprise IT transformation. Jonathan’s approach emphasizes accountability, attention to detail, and practical strategies that strengthen organizational security posture while supporting business growth. His career demonstrates how diverse experiences and cross-industry insights can be leveraged to secure complex and high-stakes environments.
Building Resilience for Next-Generation Telecommunications
As telecommunications and 5G networks expand, the stakes for cybersecurity continue to rise. These CISOs illustrate the leadership, strategic thinking, and operational expertise necessary to navigate a landscape defined by rapid technological advancement and increasingly sophisticated cyber threats. Their work ensures that emerging technologies are deployed safely, organizational risk is managed effectively, and digital transformation is underpinned by resilience and trust. For enterprises and stakeholders in the telecom sector, these leaders are guiding the way toward a secure and connected future.