CASE
STUDY
GREENFIELD OT CYBER
ASSURANCE & REQUIREMENTS FRAMEWORK
A greenfield chemical manufacturing facility operating new DCS/ESD, Level 2 and below OT systems. Required a standards-aligned cybersecurity blueprint to ensure safe design, compliant configuration, and secure commissioning of new process units.
The client needed to:
- → Validate OT architecture
- → Assess cyber risks
- → Establish Security Levels (SL-T and CyberSL).
- → Define cybersecurity requirements for engineering and implementation.
- Without a structured framework, the project risked misaligned safeguards, insecure system configuration, and compliance gaps affecting safety and reliability
Validate Architecture & Segmentation
Confirmed OT design, zones, conduits, and asset inventory.
Identify Assets & Criticality
Mapped/assessed assets to process and safety impact.
Conduct Cyber/PHA DLRA
Assessed threats, vulnerabilities, and credible scenarios.
Evaluate Cyber Risk
Calculated inherent residual risk and prioritized mitigations.
Verify Security Levels
Set SL-T and confirmed achievable CyberSL per ISA/IEC 62443.
Define 62443 Requirements
Developed CR/SR and configuration recommendations.
Deliver & Validate
Roadmap/priorities and verified secure implementation.
Oversee Implementation
Validated secure configuration during commissioning to ensure compliance with design requirements.
- 01 Standards-aligned OT architecture and segmentation model
- 02 Full visibility into credible cyber threats and vulnerabilities
- 03 Clear Security Level (SL-T & CyberSL) definition for each OT zone
- 04 Structured mitigation roadmap reducing engineering and operational risk
- 05 Cybersecurity embedded in design, procurement, FAT/SAT, and commissioning
- 06 Reduced likelihood of cyber-induced process disruptions or safety impacts
The client received a comprehensive OT cybersecurity assurance package for its greenfield units, ensuring DCS/ESD systems met required Security Levels and were implemented securely. The DLRA provided visibility into risks, validated safeguards, and defined actionable requirements—resulting in a safer, more resilient, and fully compliant OT environment ready for reliable operations
Who Should Engage Arista Cyber?
IT and OT Leaders in industrial & critical infrastructure operations who want assurance, resilience, and measurable security outcomes.
What's The Next Step?
- Schedule a Cyber Risk Assessment
- Conduct an Executive Workshop
- Start OT Security Roadmap Planning
Arista Cyber secures operations so your plant can run safely, reliably, and confidently into the future.