The NIS2 Directive significantly strengthens cybersecurity and risk management requirements for essential and important entities across the European Union. Unlike purely policy-driven approaches, NIS2 places strong emphasis on technical controls, operational readiness, and demonstrable security measures.
This page explains a reference NIS2 security architecture, showing how governance, CI/CD pipelines, and operational systems work together to meet NIS2 obligations in practice.
NIS2 Security Architecture (Overview)
“NIS2 Security Architecture – Secure Delivery and Operations”
This architecture illustrates how organizations can implement NIS2 requirements across the full lifecycle of digital services, from governance and development to production and incident response.
How to Read This Diagram
The diagram is structured from left to right, following the lifecycle of digital service delivery and operation:
- Governance & Risk Management
- Secure Development & CI/CD
- Operations & Incident Management
A cross-cutting security and evidence layer applies across all components, reflecting NIS2’s emphasis on continuous cybersecurity posture and preparedness.
Governance & Cyber Risk Management Layer
The governance layer reflects NIS2 requirements related to risk management, accountability, and organizational measures.
This layer includes:
- Cybersecurity risk assessments
- Security policies and standards
- Defined roles and responsibilities
- Management oversight and review
Under NIS2, accountability extends to executive management. Security architecture must therefore support clear ownership and demonstrable control.
Secure Development & CI/CD Layer
NIS2 explicitly requires organizations to implement secure development practices and manage risks throughout the supply chain.
In this architecture, CI/CD pipelines act as enforcement points for:
- Secure software development practices
- Access control and segregation of duties
- Security testing (SAST, dependency analysis, secrets detection)
- Supply chain risk mitigation
CI/CD pipelines ensure that security controls are applied consistently before software reaches production environments.
Operations & Incident Management Layer
The operational layer addresses NIS2 requirements for detection, response, and resilience.
Key capabilities include:
- Continuous monitoring and logging
- Incident detection and classification
- Coordinated incident response
- Recovery and service continuity mechanisms
CI/CD pipelines integrate with operations to support rapid remediation and controlled recovery following security incidents.
Supply Chain Security (Cross-Cutting Concern)
NIS2 places explicit emphasis on supply chain security. This architecture incorporates supply chain controls across development and operations:
- Dependency validation and monitoring
- Artifact integrity and provenance
- Controlled third-party integrations
- Visibility into outsourced services
These controls reduce exposure to software supply chain attacks and third-party risks.
Continuous Evidence and Accountability
Across all layers, the architecture generates continuous security evidence, including:
- Logs and monitoring data
- Security test results
- Deployment and change histories
- Incident handling records
This evidence supports regulatory supervision, incident reporting obligations, and post-incident analysis required under NIS2.
Why This Architecture Matters for NIS2
NIS2 requires organizations to demonstrate effective cybersecurity risk management, not merely document it.
This architecture enables:
- Technical enforcement of cybersecurity measures
- Continuous visibility into security posture
- Faster detection and response to incidents
- Clear accountability across teams and management
By embedding security into delivery and operations, organizations can meet NIS2 expectations sustainably.
Mapping the Architecture to NIS2 Article 21
Auditors do not assess an architecture diagram in the abstract. They test whether each layer satisfies a specific obligation under Article 21 and whether it produces evidence on demand. The table below connects the layers above to the relevant Article 21 measures and the artifacts an assessor will typically request.
| Architecture layer | NIS2 Article 21 measure | Evidence auditors request |
|---|---|---|
| Governance & risk management | Art. 21(2)(a), (f) | Risk assessments naming digital services; approved policies with review dates; records of management review and sign-off |
| Secure development & CI/CD | Art. 21(2)(e) | Security-gate pass/fail records; SBOMs; segregation-of-duties evidence in release approvals |
| Operations & incident management | Art. 21(2)(b), (c) | Monitoring and alert configuration; incident logs with detection-to-resolution timelines; disaster-recovery test results |
| Supply chain (cross-cutting) | Art. 21(2)(d) | Vendor risk assessments; artifact provenance and signatures; approved registry and dependency lists |
| Access & authentication | Art. 21(2)(i), (j) | RBAC matrices; periodic access reviews; MFA enforcement attestations for pipeline and production interfaces |
| Continuous evidence | Art. 21(2)(f) | Immutable logs; retention configuration; documented control-effectiveness reviews |
Common Findings Against This Architecture
The same weaknesses recur when a NIS2 architecture exists on paper but has not been fully operationalised. Each is a point where a control cannot be evidenced, which under supervisory review is treated as a control that is not effective:
- Architecture documented but not enforced in the pipeline, leaving security controls advisory rather than blocking
- Executive accountability required by NIS2 not evidenced — no record of management review or approval of the risk posture
- Supply chain controls limited to production, with build-time dependencies left ungoverned
- Incident procedures that do not name the delivery pipeline as an in-scope system
- Monitoring evidence that cannot be correlated across governance, delivery, and operations
- Log retention below the period needed for supervisory reporting and post-incident analysis
Verification Questions for Each Layer
Before a supervisory review, control owners can pressure-test the architecture by answering the questions an assessor is most likely to raise. Any answer that rests on assurance rather than a record signals a gap to close:
- Can management demonstrate, with records, that it reviewed and approved the organisation’s cybersecurity risk posture?
- For a sampled release, can you show which security gates it passed and who authorised the deployment?
- How are third-party dependencies validated before they enter a build, and where is that recorded?
- When was the last incident-response exercise that included a pipeline-related scenario?
- Is the CI/CD platform itself listed in the ICT asset inventory and covered by periodic access reviews?
- How long is evidence retained, and is it stored so that it cannot be altered after the fact?
Management Accountability and Reporting Obligations
NIS2 raises the stakes for governance in a way the architecture must actively support. Under Article 20, management bodies must approve the cybersecurity risk-management measures, oversee their implementation, and can be held personally accountable for failures. The governance layer above is therefore not decorative — it is where an organisation evidences that accountability to a supervisor.
The architecture must also serve NIS2’s incident-reporting timeline. Once a significant incident is identified, the operations and evidence layers need to produce, in sequence:
- An early warning to the competent authority within 24 hours
- A formal incident notification within 72 hours, including an initial assessment of severity and impact
- A final report within one month, describing root cause, mitigations, and any cross-border impact
Without correlated, time-stamped evidence flowing from monitoring through incident handling, meeting these deadlines with defensible information is difficult. The continuous-evidence layer is what makes timely, accurate reporting achievable rather than aspirational — and it is precisely this reporting readiness that auditors probe when they test the operations layer.
From Architecture to Implementation
This architecture provides a high-level reference. Practical implementation details and audit guidance are covered in related content, including:
Conclusion
NIS2 compliance starts with architecture. By integrating governance, secure development, CI/CD enforcement, and operational resilience into a unified security architecture, organizations can address NIS2 requirements proactively and consistently.
This diagram provides a clear and shared understanding of how NIS2 security obligations are implemented across modern digital systems.
