DV Cleared OT Cyber Security Engineer

Conventus Solutions Ltd; Brentford; On-site; GBP 100,000 - 125,000; Full time

Job summary

A leading defence contractor is seeking a DV Cleared OT Cyber Security Engineer to join a high-profile Defence programme in Brentford. The role involves applying Secure by Design principles, conducting risk assessments, and working closely with engineering teams. Ideal candidates will have a strong background in Operational Technology and relevant UK DV Clearance. This position is crucial for ensuring the security of critical infrastructure against cyber threats.

Qualifications

• Current Developed Vetting (DV) clearance is mandatory.
• Experience with IEC/ISA 62443 standards is desirable.
• Familiarity with NIST 800-82 and ISO 27001 standards is a plus.

Responsibilities

• Apply Secure by Design principles in engineering.
• Conduct threat modelling and risk assessments.
• Work with teams to embed security in delivery.
• Review security documentation per MOD/Defence standards.
• Provide SME input on OT security.

Skills

Active UK DV Clearance

Security Practitioner

Strong background in Operational Technology

Experience applying MOD/Nuclear Secure by Design principles

Experience in security architecture

Knowledge of risk management methodologies

Job description

Overview

Location: Aldermaston - Onsite 1-2 days per week.

We are seeking a DV Cleared OT Cyber Security Engineer with strong expertise in Secure by Design (SbD) principles to join a high-profile Defence programme. This is a critical role ensuring that Operational Technology (OT) environments are protected against evolving cyber threats while remaining resilient, safe, and compliant with security standards.

The successful candidate will be responsible for designing, implementing, and reviewing OT security controls across complex systems, supporting both engineering and assurance activities.

Responsibilities

• Apply Secure by Design principles throughout the engineering lifecycle.
• Conduct threat modelling, risk assessments, and security design reviews for OT environments.
• Work closely with engineering and project teams to embed security into delivery.
• Produce and review security documentation in line with MOD/Defence standards.
• Provide SME input on OT security to stakeholders across projects.

Essential Skills & Experience

• Active UK DV Clearance (mandatory).
• Security Practitioner
• Strong background in Operational Technology.
• Demonstrable experience applying MOD/Nuclear Secure by Design (SbD) principles.
• Proven experience in security architecture and engineering within Defence or Critical National Infrastructure.
• Knowledge of risk management methodologies and security assurance.

Desirable Skills

• Experience with IEC/ISA 62443 standards.
• Familiarity with NIST 800-82, ISO 27001, and Defence Security standards (e.g., JSPs).
• Previous MOD/Defence and or Nuclear experience.

Due to the nature and urgency of the role, candidates are required to hold current Developed Vetting (DV) clearance. If you do not hold this, we cannot sponsor. Please familiarise yourself with the security vetting process before applying.