Senior Security Architect*

Recruitment Agency: Sanderson Government and Defence

Location: Fully Remote (UK)

Temporary:  Until February 2027

Rate of pay: Up to £600 per day (Outside IR35)

• Job description

  Shape the Security of Critical UK Government Services
  
  

  We are seeking an experienced Senior Security Architect to join a major public sector programme, playing a key role in designing and assuring the security of large-scale digital services operating across cloud environments.

  This is an excellent opportunity for a senior cyber security professional with strong government experience to provide strategic security leadership, influence architectural direction, and support the secure delivery of business-critical platforms.

  
  
  What You'll Be Doing
  
  

  • Providing security architecture leadership throughout the full project lifecycle, from discovery through to service retirement.

  • Advising stakeholders on Secure by Design principles and security best practices.

  • Reviewing and assuring solution designs against established security standards, patterns and architectural frameworks.

  • Leading threat modelling, risk assessments and security design reviews.

  • Identifying security risks and recommending effective mitigation strategies.

  • Supporting cloud-first solutions across Azure and wider multi-cloud environments.

  • Reviewing penetration testing and IT Health Check outcomes and developing remediation plans.

  • Working closely with engineering, assurance and risk teams to validate security controls.

  • Producing high-quality security architecture artefacts, standards and blueprints.

  • Monitoring emerging cyber threats and incorporating threat intelligence into security decision-making.

  
  
  Experience Required
  
  

  • Extensive experience in Security Architecture within Central Government or the wider Public Sector.

  • Strong understanding of ISO 27001, NIST CSF and CIS Controls.

  • Deep knowledge of NCSC and HMG security standards and guidance.

  • Expertise in Azure security technologies, including Entra ID, Azure Policy, Key Vault and Identity & Access Management.

  • Experience securing cloud-native and microservices-based architectures.

  • Strong background in threat modelling, risk analysis and security assurance.

  • Experience supporting penetration testing and control effectiveness reviews.

  
  
  Desirable Certifications
  
  

  • CISSP

  • CISM

  • SABSA

  • TOGAF

  • Azure Solutions Architect

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