OT Cyber Security Analyst

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 & gas, rail, chemical, nuclear, or similar critical infrastructure environments
• Strong OT/ICS security background
• Experience implementing OT security controls and strategies
• Knowledge of OT networks, segmentation, and industrial protocols
• SIEM/SOC integration experience in OT environments
• Strong understanding of:
• IEC 62443
• NIST Cybersecurity Framework
• ISO 27001
• UK CAF framework
• Experience with OT risk assessments and gap analysis
• Strong communication and documentation skills
• Max 2-week notice period

Desirable

• OT asset discovery / monitoring tooling experience
• Exposure to UK critical infrastructure regulation (e.g. NIS, CAF)
• ITSM and service delivery lifecycle understanding
• Hybrid IT/OT environment experience