Security Architect

Project overview

£600 per day | Outside IR35 | Remote | Active SC Clearance Required

Project details

Remote with occasional travel to client sites across the UK

Contract: Initial 6 months (Strong likelihood of extension)

Clearance: Active SC Clearance required

The Opportunity

We are seeking an experienced Security Architect to support a major UK Government transformation programme. This is an excellent opportunity to play a key role in shaping security strategy across complex digital services, influencing security architecture decisions, and driving secure-by-design practices at scale.

Working within a high-profile public sector environment, you will lead threat modelling initiatives, develop reusable security patterns, provide architectural assurance, and act as a trusted security advisor across multiple delivery teams.

This role offers a rare opportunity to combine strategic security leadership with hands-on technical architecture, helping to improve security capabilities across a large and complex technology landscape.

What's on Offer

Key Responsibilities

Essential Skills & Experience

Desirable Experience

If you are an SC-cleared Security Architect with strong threat modelling expertise and experience within Government or highly regulated environments, we'd love to hear from you.

• £600 per day Outside IR35
• Initial 6-month contract with strong extension potential
• Remote-first engagement with occasional UK travel
• Opportunity to influence security strategy across a major Government programme
• Work alongside senior architects, security specialists and technical delivery teams
• Lead and facilitate threat modelling activities across multiple programmes and services
• Define and enhance enterprise threat modelling strategies, frameworks, methodologies and tooling
• Develop and maintain reusable security patterns, reference architectures and architectural guardrails
• Produce high-quality security architecture artefacts aligned to Government and industry best practice
• Provide security design assurance and architectural guidance throughout the software development life cycle
• Act as the security SME within technical design reviews and architecture governance forums
• Drive adoption of secure-by-design principles across engineering and delivery teams
• Support risk identification, assessment, treatment and mitigation activities
• Collaborate with enterprise architects, solution architects, technical leads and security stakeholders
• Contribute to security roadmaps, standards and strategic security initiatives
• Provide thought leadership on emerging security threats, technologies and industry best practice
• Proven experience operating as a Security Architect within complex enterprise and/or Government environments
• Active SC Clearance
• Extensive experience leading threat modelling activities and establishing scalable threat modelling practices
• Strong knowledge of threat modelling methodologies, including:
• STRIDE
• PASTA
• Attack Trees
• MITRE ATT&CK
• Experience selecting, implementing and improving threat modelling tooling
• Demonstrable experience creating and maintaining reusable security patterns and reference architectures
• Strong knowledge of:
• Cloud Security (Azure, AWS or GCP)
• Identity & Access Management (IAM)
• Network Security
• Application Security
• Secure Development Lifecycle (SDLC)
• DevSecOps
• Strong stakeholder management and influencing skills
• Ability to communicate complex security concepts to both technical and non-technical audiences
• Previous experience working within UK Government departments, agencies or arms-length bodies
• Experience working with NCSC security frameworks and guidance
• Knowledge of Zero Trust architectures and cloud-native security patterns
• Experience supporting security assurance, accreditation and risk management processes
• Start: ASAP
• Duration: 6 months
• Remote: remote
• Location: United Kingdom, GB
• Rate: 75-75 EUR/h
• Languages: English