Systems Engineer
+SC cleared role
+Hybrid working 2/3 days a week in Reading
+Inside IR35
+£80 - £83 ph
We are seeking an experienced Senior Systems Engineer to lead the delivery of model-based Product Security digital capabilities across a complex, regulated engineering environment.
Reporting to the Product Owner - Systems Engineering, you will define and implement the reference architectures, toolchains and technical baselines that enable end-to-end traceability across the Digital Thread - from security objectives and threat modelling through to verification, validation and assurance evidence.
This role replaces document-centric practices with authoritative, model-based security engineering across the full product lifecycle.
Key Responsibilities
* Deliver and continuously improve Product Security digital toolchains, including:
o Threat & risk modelling (STRIDE, STPA-Sec, TARA, attack trees)
o Security requirements & controls modelling
o SBOM & vulnerability management
o Cryptography & key management governance
o Configuration/change control
o Verification & validation orchestration
o Security/assurance case evidence
* Define Product Security reference architecture and Digital Thread integrations
* Own roadmap, backlog and delivery planning aligned to enterprise priorities
* Establish governance, data standards and model quality controls
* Lead vendor engagement, technology evaluations and service performance
* Drive adoption of model-centric security engineering across programmes and suppliers
* Ensure alignment with regulatory frameworks (DO-326A, IEC 62443, ISO/IEC 27001, ISO/SAE 21434, NIST, etc.)
Experience Required
* 10+ years delivering Product Security capabilities in aerospace, defence or other regulated/safety-critical sectors
* Strong understanding of model-based security engineering and Digital Thread integration
* Experience integrating modelling, ALM, CI/CD security services and verification pipelines
* Proven stakeholder, supplier and budget management capability
* ITIL and Project/Programme delivery experience (APM, PRINCE2, SAFe or similar)
* SC clearance
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