As threats evolve in complexity and persistence, we can no longer afford a fragmented or reactive approach to security. Effective security must be designed, implemented, and sustained across the entire lifecycle of systems and services—embedding protection into every layer, from strategic planning to operational resilience.

But how do you structure a security architecture function that not only protects but enables business outcomes?

For those tasked with shaping secure digital transformation, the answer lies in understanding the distinct roles within a mature security architecture practice—and ensuring the right capabilities are in place to support strategic, project, and operational goals.

This page introduces a practical framework for security architecture roles, based on clear functional separation and collaboration:

Enterprise Security Architect (ESA)

Strategic, holistic, and business-aligned. The ESA sets direction, defines standards, and ensures that security architecture is integrated into enterprise architecture and business strategy. Think of them as the conductor of the security orchestra—translating organisational goals into cohesive, risk-aware architecture.

Security Solutions Architect (SSA)

Tactical and delivery-focused. The SSA embeds security into projects—whether cloud migrations, new digital services, or critical updates. They translate policy into action, ensuring security is “built-in” from the start and aligned with project constraints and timelines.

Operational Security Architect (OSA)

Persistent and adaptable. The OSA maintains security posture through the Operate and Maintain phases of live systems, handling incident response, security operations, and secure decommissioning. Their work ensures that protections evolve as systems mature and threats change.