Principal Security Architect — Remote with UK Travel

Computer Network Defence Ltd (CND); Corsham; Remote; GBP 120,000 - 175,000; Part time

Job summary

Computer Network Defence Ltd (CND) is seeking an experienced Principal Consultant - Security Architect to design, develop and assure secure technology solutions across complex programmes. You will define target architectures, manage security risks, embed Secure by Design principles, and support accreditation throughout the lifecycle.

The role involves travel to UK customer sites, collaboration with varied stakeholders, leading security reviews, threat modelling, and governance activities while

Qualifications

• Experience as a Security Architect or lead security consultant.
• Strong knowledge of security architecture frameworks and best practices.
• Experience applying Secure by Design principles.
• Background in secure infrastructure, network, application, cloud, or data solution design.
• Knowledge of security governance, risk management, assurance, and accreditation.
• Understanding of cloud, digital transformation, and emerging technology security challenges.
• Experience within Defence, Government, CNI, or other regulated environments is desirable.
• Strong stakeholder engagement, communication, and documentation skills.
• Ability to identify risks and provide pragmatic security solutions.
• Experience with threat modelling, security reviews, and risk assessments.

Responsibilities

• Lead security architecture across complex technology programmes.
• Embed Secure by Design principles throughout the solution lifecycle.
• Assess existing solutions and define secure target-state architectures.
• Conduct security reviews, threat assessments, and risk analysis.
• Support the secure integration of infrastructure, applications, cloud, data, and emerging technologies.
• Produce security documentation, risk assessments, and assurance artefacts.
• Work with customers and assurance teams to support accreditation and compliance.
• Advise on security controls, governance, and risk mitigation.
• Facilitate technical workshops, design reviews, and stakeholder engagement.
• Promote security best practice and provide technical leadership.

Skills

Security Architecture

Threat Modelling

Risk Assessment

Secure by Design

Governance & Risk

Stakeholder Engagement

Documentation

Cloud Security

Communication

Job description

Computer Network Defence Ltd (CND) is seeking an experienced Principal Consultant - Security Architect to design, develop and assure secure technology solutions across complex programmes. You will define target architectures, manage security risks, embed Secure by Design principles, and support accreditation throughout the lifecycle.

The role involves travel to UK customer sites, collaboration with varied stakeholders, leading security reviews, threat modelling, and governance activities while