ISO/IEC 27001 External Audits

ISO 27001 is a management system, not a checklist. Rheinberry audits whether your ISMS is operationally credible and defensible.

ISO 27001 Readiness Review - Understand your current security posture

Best suited for:

• Pre-certification preparation 
• Internal benchmarking 
• Early-stage ISMS development 

What this covers:

• ISMS scope and governance 
• Risk assessment approach 
• Initial control and documentation review 

Typical engagement:

• 1–2 weeks 
• Focused leadership and security team input 

Outcome: A clear, prioritised view of your ISMS maturity.

ISO 27001 External Audit Assessment - Independent assurance of your ISMS in practice

Best suited for:

• Organisations requiring independent validation 
• Pre-certification confidence 
• Customer or partner scrutiny 

What this covers:

• Policy and control framework 
• Supplier governance 
• Incident and corrective action processes 
• Operational walkthroughs 

Typical engagement:

• 2–4 weeks 
• Cross-functional engagement (IT, security, operations) 

Outcome: Confidence that your ISMS is credible and operational.

Advanced Security Assurance Review - For complex or high-risk environments

Best suited for:

• Regulated sectors 
• Critical infrastructure 
• High-sensitivity data environments 

What this covers:

• Full ISMS assessment 
• Deep dives into high-risk areas 
• Governance resilience under stress 
• Executive-level reporting 

Typical engagement:

• 4–6 weeks
• Extensive stakeholder engagement 
• Targeted deep-dive analysis 

Outcome: A resilient and decision-ready security governance model.

Optional support

• Internal audit preparation 
• Security governance workshops 
• Policy and control remediation 
• Executive briefings 

Ongoing assurance (typically quarterly or biannual review cycles)  

Whether you are preparing for certification, testing readiness, or strengthening assurance for customers, regulators, or internal leadership, Rheinberry can help.

Talk to Rheinberry about:

• ISO/IEC 27001 external audits 
• certification readiness reviews 
• combined security and AI governance assessments 

Rheinberry delivers independent assurance that is practical, rigorous, and grounded in operational reality.

info@rheinberry.com