Senior Security Architect
Posted 5 days ago by Lorien
£625 Per day
Inside
Onsite
City of London, UK
Summary: The Senior Security Architect role involves providing security design leadership for major technology initiatives within a Higher Education or public-sector environment. The position requires a focus on security architecture assurance, reviewing designs, and ensuring alignment with security frameworks and organizational risk appetite. The role is based in London and requires on-site presence on specific days. This is a 6-month contract position classified as inside IR35.
Key Responsibilities:
- Review HLDs and LLDs, providing clear, pragmatic security feedback to architects and engineers
- Define, explain, and advocate baseline security control sets across programmes and projects
- Ensure designs align with recognised frameworks including NCSC CAF, NCSC CSF, NIST CSF, and NIST SP 800-53
- Provide security design assurance across:
- Network modernisation
- Identity modernisation
- Cloud adoption and migration (AWS preferred; Azure/GCP acceptable)
- CI/CD and DevSecOps pipelines
- Translate security requirements into actionable design guidance rather than policy-only responses
- Participate in design forums and governance boards, strengthening secure-by-design delivery
- Support security risk assessments, threat modelling, and control gap analysis
Key Skills:
- Ability to review an HLD (High level design) or LLD (low level design) and provide security feedback
- Understand, explain and able to advocate baseline control sets
- Understanding of NCSC CSF and 800-53, NCSC CAF
- Experience of one or more of security elements of Network modernisation, Identity modernisation, cloud adoption (AWS) and migration, or CI/CD pipeline implementation
- NIST CSF
- Security controls
- Technical Design Authority - Desirable
- Higher Education Experience - Desirable
Salary: £625 per day
City: London
Country: UK
Working Arrangements: on-site
IR35 Status: inside IR35
Seniority Level: Senior
Industry: IT
Role: Senior Security Architect
Location: London - needs to be onsite Wednesday and Friday
Duration: 6 month contract
Rate: £625 per day - Inside of IR35
We are seeking an experienced Senior Security Architect to provide security design leadership across major technology change initiatives within a Higher Education/public-sector-style environment.
This role will focus on security architecture assurance, reviewing High-Level Designs (HLDs) and Low-Level Designs (LLDs), advising delivery teams, and ensuring solutions align with agreed security control baselines, organisational risk appetite, and recognised security frameworks.
Key Responsibilities- Review HLDs and LLDs, providing clear, pragmatic security feedback to architects and engineers
- Define, explain, and advocate baseline security control sets across programmes and projects
- Ensure designs align with recognised frameworks including NCSC CAF, NCSC CSF, NIST CSF, and NIST SP 800-53
- Provide security design assurance across:
- Network modernisation
- Identity modernisation
- Cloud adoption and migration (AWS preferred; Azure/GCP acceptable)
- CI/CD and DevSecOps pipelines
- Translate security requirements into actionable design guidance rather than policy-only responses
- Participate in design forums and governance boards, strengthening secure-by-design delivery
- Support security risk assessments, threat modelling, and control gap analysis
- Ability to review an HLD (High level design) or LLD (low level design)and provide security feedback
- Understand, explain and able to advocate baseline control sets
- Understanding of NCSC CSF and 800-53, NCSC CAF
- Experience of one or more of security elements of Network modernisation, Identity modernisation, cloud adaption (AWS) and migration, or CICD pipeline implementation.
- NIST CSF
- Security controls
- Technical Design Authority - Desirable
- Higher Education Experience - Desirable
Guidant, Carbon60, Lorien & SRG - The Impellam Group Portfolio are acting as an Employment Business in relation to this vacancy.
