OT Cyber Security Specialist

OT Cyber Security Specialist (Contract)

Location: Hybrid – 3 days onsite (Oxfordshire), remainder remote

Day Rate: £400-£450 per day (Outside IR35)

Start Date: ASAP

Clearance: SC required

Hours: 37.5 per week (typically 9:00am–5:30pm)

Overview

We are supporting a leading UK organisation within the advanced engineering and research sector, seeking an OT Cyber Security Specialist to play a key role in building and maturing their Operational Technology (OT) security capability.

This is a greenfield opportunity to shape and implement OT security strategy, frameworks, and governance across complex industrial environments.

Key Responsibilities

• Lead the design and delivery of the OT Security Strategy, including policies and standards
• Establish governance processes aligned to enterprise security frameworks
• Conduct OT risk assessments and gap analyses against recognised standards (e.g. IEC 62443, NIST CSF, CAF)
• Identify and oversee implementation of security controls across OT environments
• Provide technical oversight when working with managed service providers and third-party vendors
• Collaborate with enterprise security teams to align OT and IT security initiatives
• Support OT incident response, including coordination with SOC teams where applicable
• Mentor junior team members and contribute to capability development
• Track and report on OT security maturity and roadmap progress

Essential Experience

• Proven experience developing and maturing OT security within ICS or critical infrastructure environments
• Strong background in defining and implementing OT security strategies, policies, and standards
• Deep understanding of OT security frameworks (IEC 62443, NIST CSF, CAF, ISO 27001)
• Experience conducting OT risk assessments, gap analysis, and remediation planning
• Knowledge of OT networks, segmentation, and industrial protocols
• Experience working closely with engineering and operational teams
• Ability to oversee third-party vendors and managed security services
• Strong documentation and stakeholder communication skills

Desirable Experience

• Experience in solution architecture
• Familiarity with SIEM/SOC integration in OT environments
• Experience with OT asset discovery and monitoring tools
• Knowledge of regulatory frameworks within critical infrastructure (e.g. NIS)
• Experience contributing to working groups or acting as a subject matter expert.

Please apply with an up to date version of your CV for immediate consideration.