Cyber Security Analyst

Job Title: Cyber Security Analyst (Operational Technology)

Location: (Oxfordshire) (2 days/week on-site), UK

Duration: 6 months+

IR35: Inside IR35

Overview

The Cyber Security Analyst will implement, operate, and continuously improve Operational Technology security controls across the Client’s environments. This includes hands-on security engineering, policy and standards development, risk assessments, SOC/SIEM integration, and collaboration with engineering teams and MSPs to ensure OT systems are protected in line with industry frameworks (IEC 62443, NIST CSF, CAF, ISO 27001).

Key Responsibilities:

• Deploy and maintain OT security controls (network segmentation, secure remote access, monitoring tools)
• Integrate OT systems into SOC/SIEM, develop detection rules, and triage alerts
• Support OT asset discovery, security assessments, and vulnerability remediation
• Assist with OT incident response (log collection, triage, SOC coordination)
• Collaborate with engineering teams for secure system changes
• Report on OT security maturity, control coverage, and detection capabilities
• Mentor junior team members on OT security practices

Essential Requirements:

• Experience in OT security within critical infrastructure (oil, gas, rail, chemical process industries)
• SIEM/SOC integration for OT
• Implementing OT security strategies, policies, and standards
• Knowledge of OT networks, industrial protocols, and segmentation
• Conducting OT risk assessments, gap analysis, and remediation

Desirable:

• OT asset discovery and monitoring experience
• Regulatory compliance knowledge (e.g., NIS Directive, UK CAF)
• Familiarity with project/service delivery and ITSM controls