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:

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

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

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