Cyber Security Consultant

Oscar Technology; England; On-site; GBP 100,000 - 125,000; Full time

Job summary

A leading tech recruitment company is seeking a Cyber Security Consultant for a long-term contract based in Reading. The role requires deep expertise in MoD Security by Design and Operational Technology security aligned with ISO 62443 standards. Responsibilities include applying security principles, conducting risk assessments, and supporting audits. Candidates must have proven experience at SFIA level 4/5 and hold current DV clearance. Competitive daily rate offered.

Qualifications

• Proven track record as a Security Practitioner at SFIA level 4/5.
• Current, practical experience with MoD SbD.
• Strong knowledge of OT security and ISO 62443.
• Experience in Defence and CNI environments.
• Must hold current DV clearance.

Responsibilities

• Apply MoD SbD principles across system design.
• Carry out risk assessments and threat modelling.
• Provide expertise in OT environments.
• Develop and maintain security documentation.
• Support audits and compliance activities.

Skills

Security Practitioner

MoD Security by Design (SbD)

Operational Technology (OT) security

ISO 62443 standards

Risk management

Communication skills

Job description

Overview

Cyber Security Consultant Reading, 1–2 days on site GBP550–GBP600p/day, IIR35 2–year Contract DV Clearance

Our client is seeking a highly skilled Security Practitioner (SFIA level 4/5) to support a long–term programme in Berkshire. The role requires deep expertise in MoD Security by Design (SbD) and Operational Technology (OT) security, specifically aligned to ISO 62443 standards.

Key Responsibilities

• Apply MoD SbD principles across system and solution design.
• Carry out risk assessments and threat modelling to embed security throughout project lifecycles.
• Provide expertise in OT environments (industrial control systems, SCADA, PLCs, etc.), with specific alignment to ISO 62443.
• Develop and maintain security documentation, including risk registers and assurance evidence.
• Work closely with technical teams, architects, and programme stakeholders to ensure security requirements are met.
• Support audits, accreditation, and compliance activities within a Defence and CNI context.
• Act as a trusted advisor, ensuring security, resilience, and compliance remain central to all project activities.

Essential Skills & Experience

• Proven track record as a Security Practitioner at SFIA level 4/5.
• Current, practical experience with MoD SbD and associated risk management frameworks.
• Strong knowledge of OT security and ISO 62443.
• Demonstrated ability to work in Defence, Government, or Critical National Infrastructure environments.
• Familiarity with security assurance, accreditation, and governance processes.
• Excellent communication and stakeholder management skills.
• Must hold current DV clearance.

If you are an experienced Security Practitioner with expertise in MoD SbD and OT/ISO 62443, and you\'re seeking a long–term contract assignment, send through your CV and I shall give you a call.

Oscar Associates (UK) Limited is acting as an Employment Business in relation to this vacancy.

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