Job Description:

Senior Technical Architect – National Security Programme

📍 Milton Keynes (Hybrid – 60% onsite)
💰 £508.77/day PAYE or £652.82/day Umbrella
📅 6 Month Contract (Potential Extension)
🔒 SC Clearance Eligible Required

A leading government-focused organisation is seeking a Senior Technical Architect to support the delivery of critical national security capabilities. This is a high-impact role working at the intersection of architecture, engineering, and secure government operations.

The Role

You’ll play a key role in shaping and delivering secure technical solutions within a complex, high-assurance environment. Acting as a bridge between stakeholders and technical teams, you’ll ensure solutions are robust, compliant, and aligned with strategic objectives.

Key Responsibilities

• Lead technical engagement with stakeholders, translating business needs into scalable solutions
• Facilitate and run technical workshops with customers and delivery teams
• Produce and maintain high- and low-level technical designs
• Provide 4th line technical oversight and support for complex issues
• Conduct impact assessments across functional, capability, and security domains
• Review and govern technical changes, ensuring alignment with standards and best practices
• Contribute to architectural governance and support wider CTO function activities
• Evaluate emerging technologies and present options, including cost/benefit analysis
• Required Experience

• Strong background in technical architecture within secure or government environments
• Experience working with enterprise infrastructure and virtualised platforms
• Solid knowledge of:
  • Microsoft and Linux operating systems
  • VMware stack (vCloud Director, vSAN, NSX)
  • Network technologies and secure architectures (e.g. SASE)
  • High-grade encryption technologies
• Proven experience producing architectural documentation (HLDs, LLDs, options papers)
• Strong understanding of security frameworks (e.g. NCSC, NIST, CIS, Cyber Essentials)
• Experience managing and owning technical requirements
• Excellent stakeholder engagement and communication skills

Desirable

• Experience in matrix organisations
• Exposure to Infrastructure as Code, containerisation, and microservices

• Working Arrangements

• Hybrid model: minimum 60% onsite in Hanslope Park
• Standard working week: 37.5–48 hours
• Participation in an on-call rota (additional flat-rate payments apply)

Additional Information

• Candidates must be British nationals and eligible for SC clearance
• This role falls inside IR35
• Travel within Milton Keynes/London is expected within the day rate