Location: Culham, Oxfordshire (2 days/week on-site) Contract: Until 18/12/2026 IR35: In Scope Rate: 50/hr Umbrella Clearance: Active SC or lapsed within 12 months Role Overview We are seeking an experienced OT Cyber Security Analyst to support the security, monitoring, and continuous improvement of Operational Technology environments within a critical infrastructure setting. This role combines hands-on OT security engineering with governance and risk responsibilities, ensuring OT systems are protected, monitored, and aligned with industry standards and frameworks. You will work closely with OT engineers, security teams, and third-party providers to implement and maintain effective OT security controls. Key Responsibilities Implement OT security controls (segmentation, secure remote access, monitoring tools) Integrate OT environments into SIEM/SOC platforms and tune detections Support OT asset discovery, inventory, and security assessments Identify vulnerabilities and support remediation planning Assist with OT incident response (log collection, triage, SOC coordination) Work with engineers to ensure secure system changes with minimal disruption Track OT security maturity, control coverage, and reporting Contribute to OT security policies, standards, and continuous improvement Essential Requirements Experience in oil and gas, rail, chemical, nuclear, or similar critical infrastructure environments Strong OT/ICS security background Experience implementing OT security co