Security Architecture Consultant (Cryptography & Quantum Security)
PA Consulting · London, , United Kingdom · Hybrid
Posted Sep 9, 2026
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Why consider joining our Digital Trust & Cyber Security community? 🤔 
PA has one of the leading applied quantum capabilities in consulting, combining expertise across quantum sensing, quantum computing, and quantum-safe security. Working closely with Jacobs and our wider global teams, we help government and commercial clients explore, adopt and secure emerging quantum technologies.
As organisations increasingly prepare for the transition to quantum-safe cryptography, we are helping clients understand their exposure to quantum risk, develop migration strategies and embed cryptographic agility into their technology landscapes.
Unlike many roles focused solely on technology delivery, this position offers the opportunity to help shape a rapidly emerging market. You will work alongside leading experts in cybersecurity, quantum technologies and critical infrastructure while helping some of the world's largest organisations prepare for a future where cryptographic trust must evolve.
Grow a flexible and unique career within a trust-based, inclusive environment that values excellence, innovation, and curiosity. You have the option to progress with us on a technical career track. No need to go onto the Partner career track if this doesn’t align with what you want to do. 
Hybrid working - our approach is to be in the office or on client site a minimum of 2 days per week.  
Deepen your expertise through our culture of learning and growth, with access to technical and non-technical training, professional certifications, and opportunities to contribute to our growing quantum and cryptography community.
Join other experts within our supportive and collaborative tech community through knowledge-sharing and peer-level support, coaching and mentoring 
Deepen your expertise through our culture of learning and growth  – you’ll have budget to take courses (technical and non-technical training), plus gain certifications 
What you can expect 🌱 
Security architecture and secure-by-design activities.
Cryptography and PKI advisory work.
PQC readiness assessments and migration planning.
Cryptographic discovery and inventory activities.
Cloud, enterprise and technology transformation programmes.
Client workshops and stakeholder engagement.
Development of PQC propositions, methods and thought leadership.
Support for bids and business development activity.
An environment that deeply cares about its values  Values | PA Consulting
Essential requirements ✅ 
Even if you don’t meet every requirement below, feel free to still apply as we are often hiring for similar roles which your background might be better suited to. 
Security architecture experience.
Applied cryptography, PKI, key management or related cybersecurity experience.
Understanding of public key cryptography, certificates and trust services.
Experience producing assessments, roadmaps and technical recommendations.
Strong…