Arnex Solutions LLC

Lead cybersecurity operations and MDR delivery with expertise in OT/ICS and multi-cloud environments. | 10+ years in security operations leadership with OT/ICS experience, CISSP and related certifications, but no explicit Rockwell PLC or Ignition SCADA hands-on experience. | Team, We have below new requirement from the client, please work on it. Title: Senior OT Cybersecurity & CRA Compliance Architect (Pharma - Rockwell / Ignition) Role Summary We are seeking an experienced OT Cybersecurity Architect to lead cybersecurity, cyber resilience, and regulatory compliance initiatives in a GMP-regulated pharmaceutical environment. The role focuses on Rockwell PLC (ControLogix/CompactLogix) systems, Ignition SCADA, and compliance with EU Cyber Resilience Act (CRA), IEC 62443/ISA99, ISA 95, GMP, and FDA 21 CFR Part 11. Key Responsibilities • Lead CRA implementation and gap assessments for OT systems. • Define and maintain global OT reference architecture (Purdue model, zones & conduits, DMZ). • Secure and harden Rockwell PLCs and Ignition SCADA environments. • Perform OT cyber risk assessments and threat modelling. • Implement secure configuration baselines for servers and engineering workstations. • Ensure compliance with GMP & FDA 21 CFR Part 11 (audit trails, electronic records, RBAC). • Support Computer System Validation (CSV) documentation (URS/NFR/FS/DS/IQ/OQ/PQ). • Define patch management and vulnerability handling processes for validated OT systems. • Support audit readiness and regulatory inspections. Required Skills & Expertise OT & Automation • Rockwell ControlLogix / CompactLogix • Studio 5000 • EtherNet/IP • Ignition SCADA configuration & security • OPC / Industrial protocols Cybersecurity • IEC 62443 implementation • Network segmentation & firewall design • Secure remote access architecture • Vulnerability & patch management (OT context) • Threat modeling & risk assessment Regulatory & Compliance • EU Cyber Resilience Act (CRA) • GMP (Pharma manufacturing systems) • FDA 21 CFR Part 11 • Computer Svstem Validation (CSV) Change control in regulated environments System Hardening • Windows Server hardening (SCADA, Historian, • Engineering Stations) • Active Directory design and security for OT domains • CIS benchmarks & security baseline implementation • Group Policy (GPO) hardening and privilege management • Application whitelisting (e.g., AppLocker) • Secure service configuration & port minimization • Local admin restriction & credential protection • Secure RDP configuration & jump server model • Patch validation in GMP-regulated environments • Backup integrity verification & disaster recovery validation • Log configuration, retention & audit trail protection Experience Required • 8+ years in OT / ICS cybersecurity • 3+ years in Pharma or regulated industry • Hands-on experience with Rockwell PLC and Ignition SCADA • Experience implementing IEC 62443 controls Preferred Certifications • IEC 62443 Cybersecurity Expert • GICSP / CISSP • Rockwell Automation certifications