At a Glance
- Tasks: Lead security architecture for AI/ML projects and ensure secure design practices.
- Company: High-profile defence programme in Portsmouth with a hybrid working model.
- Benefits: Competitive daily rate of £645, flexible work environment, and opportunity to shape security in Defence.
- Other info: 5-month contract with excellent opportunities for professional growth and mentorship.
- Why this job: Make a real impact on UK Defence by embedding security in cutting-edge technologies.
- Qualifications: Proven experience in security architecture, cloud security, and strong communication skills.
The predicted salary is between 60000 - 80000 £ per year.
Requirements
- Proven experience as a Security Architect within complex enterprise or Defence environments.
- Strong background in cloud security architecture across multi-cloud and edge platforms.
- Experience implementing Secure by Design principles and Dev Sec Ops practices.
- Expertise in threat modelling and risk management.
- Expertise in policy-as-code.
- Expertise in CI/CD security controls.
- Expertise in software supply chain security.
- Expertise in SBOMs, artefact signing, and software provenance.
- Excellent stakeholder management and communication skills.
- Previous experience working within UK Defence or other highly regulated environments.
- Experience leading technical security governance forums.
- Active SC or DV Clearance.
- Sole UK National.
- CISSP or equivalent security certification.
- TOGAF or equivalent architecture certification.
- Previous experience supporting Defence programmes.
Responsibilities
- Lead security architecture across AI/ML development and trial programmes.
- Drive a Secure by Design approach throughout project delivery.
- Own the end-to-end security assurance process.
- Design secure multi-cloud and edge architectures aligned with Defence requirements.
- Define trust boundaries, classification‑aware architectures, and secure cross‑domain data controls.
- Develop the security roadmap covering Dev Sec Ops, policy‑as‑code, and secure CI/CD pipelines.
- Lead software supply chain security, including SBOMs, artefact signing, and software provenance.
- Conduct threat modelling and security risk assessments.
- Chair security working groups and collaborate with multinational stakeholders.
- Engage with senior leadership to communicate security risks, assurance activities, and programme outcomes.
- Mentor junior security professionals and promote security best practice across delivery teams.
- Technologies
- AI
- Architect
- CI/CD
- Cloud
- Dev Sec Ops
- Security
- TOGAF
- Embedded
- More
We are a high‑profile defence programme based in Portsmouth with a hybrid working model requiring three days onsite.
This is a 5‑month contract inside IR35 at £645 per day.
We are seeking an experienced Security Architect to help shape secure AI and cloud technologies within the UK Defence sector, working alongside senior technical leaders, architects, and engineering teams to embed security across the programme lifecycle.
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Security Architect - Portsmouth employer: CBSbutler Holdings Limited trading as CBSbutler
At CBSbutler, we pride ourselves on being an excellent employer, offering a dynamic work culture that fosters collaboration and innovation. Our Hampshire location provides a secure environment for our DV Cleared Infrastructure Test Engineers to thrive, with competitive rates and opportunities for professional growth within a high-profile infrastructure programme. Join us to be part of a team that values your expertise and supports your career development in a meaningful way.
Contact Details:
CBSbutler Holdings Limited trading as CBSbutler Recruitment Team
