CISODAY 2026

Join CISODAY on 21 May 2026 at NBC Congrescentrum in Nieuwegein! CISODAY is an annual network event for CISOs and direct reports in business, government, and everything in between. More than 300+ cybersecurity leaders, including CISOs and their direct reports, will be brought together for strategic conversations on the most current challenges facing the industry. Security Delta (HSD) is endorsing partner of this edition.

The notion of ecosystems is not new in IT. Traditionally, it stood for a collection of interconnected technologies, often grown organically, rarely designed for resilience, and typically viewed through a narrow IT lens. In these environments, cybersecurity was treated as a technical discipline, reactive by nature, and largely disconnected from the way organizations operate. The role of the CISO in this operating model was inevitably limited.

This model has reached its end.

Today’s threat landscape is dynamic, asymmetric, and deeply interconnected. Threats do not respect organisational boundaries, architectures, or ownership models. No single team, tool, or individual can maintain oversight alone. Cybersecurity is no longer about defending systems in isolation; it is about understanding, anticipating, and managing threats as they evolve across an entire ecosystem.

Real resilience emerges only when cyber threat management is embedded throughout the organisation. This requires an ecosystem in which people, processes, and technology are deliberately aligned around a shared understanding of the threat landscape. Networks, devices, applications, identities, partners, and data must function as one coherent system, continuously informed by cyber threat intelligence (CTI), capable of detecting weak signals, correlating anomalies, and responding in a coordinated and timely manner.

Perimeter-centric thinking has become insufficient. Modern resilience is built on situational awareness, contextual intelligence, and the ability to adapt defenses as threats change. CTI is not an isolated function; it is the connective tissue that enables informed decision-making across technical, operational, and strategic levels.

In this ecosystem-driven approach, the CISO plays a different role. It has moved from ownership to orchestration. Cybersecurity is a shared responsibility, distributed across leadership, specialists, and operational teams, each contributing from their own vantage point. Resilience is no longer delivered by controls alone, but by collective understanding and coordinated action.

While this approach is increasingly recognised, it is still practiced by only a minority of organisations. Many remain fragmented, reactive, and structurally unprepared for the realities of today’s threat environment. This is precisely where the CISO Community plays a role: supporting organisations in moving from isolated defenses to resilient cyber ecosystems.

The community itself is an ecosystem: connecting organisations, sharing threat insights, exchanging experience, and strengthening collective resilience.

CISODAY brings this to life.

Therefore, join CISODAY on May 21, as in an interconnected threat landscape, ecosystem resilience is not something a CISO can build alone. Click here for more information and registration!