Security Engineer (UK)

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Location: London

Job Type: Full-time

Salary: Competitive

Equity: Benchmarked

As Security Engineer, you will design, build and operate the security architecture that protects Isembard’s factories, MasonOS platform and customer data environments. You will secure both cloud infrastructure and on-site operational technology (OT), ensuring our manufacturing network meets aerospace, defence and critical-industry standards.

This role spans IT, OT and product security. You will work closely with software engineers, machinists, robotics engineers and factory GMs to embed security into every layer of the stack — from CNC-connected networks to customer-facing APIs.

Harden infrastructure across factory and cloud environments

Implement zero-trust identity and access controls

Design monitoring, detection, and incident response capabilities

Conduct penetration testing and vulnerability remediation

Embed secure-by-design practices into MasonOS development and deployments

Secure factory-connected and operational technology systems

Infrastructure and cloud security expertise

Strong threat modelling and risk analysis ability

Experience implementing security tooling and monitoring systems

Experience operating in regulated or high-assurance environments

Experience securing manufacturing environments

Knowledge of Cyber Essentials, ITAR, CMMC, export controls or defence compliance requirements

Experience working in fast-scaling startups

Responsibility for securing mission-critical industrial infrastructure

Exposure to defence-grade operational environments

Equity participation

Strategic influence over cross-site infrastructure standards

Opportunity to define secure-by-design factory networks

Isembard is on a mission to forge industrial acceleration. We enable faster and cheaper products to be made for critical industries by combining advanced machine tools, robotics and our proprietary software, MasonOS. The components we manufacture are used in aerospace, defence, energy and other strategically important sectors.

Our values:

If not now, when

Follow the five maxims

Humour and humility