Enterprise Security Architect - Long-term
Inside IR35: -550 - -600
Hybrid: 2 days a week in London / Bristol
Active SC Clearance required

We''re looking for an SC Cleared Enterprise Security Architect to support a major secure telecoms programme across mobile network, enterprise IT and cloud environments.

You''ll help define and maintain security architecture across 4G/5G core, RAN, OSS/BSS, AWS, SDN/NFV, Open RAN, edge computing and cloud migration workstreams, ensuring designs are secure, compliant and aligned to programme objectives.

• Define and maintain enterprise security architecture across telecoms and enterprise IT systems
• Develop target-state security architectures aligned to business, regulatory and operational requirements
• Apply TOGAF, SABSA and ArchiMate across architecture artefacts and governance
• Design secure AWS, hybrid and cloud-native architectures
• Conduct threat modelling, risk assessments and security design reviews
• Define security patterns, standards and reference architectures
• Support assurance, governance, audit and secure-by-design delivery
• Collaborate with engineering, operations, risk, compliance and vendor teams

• Enterprise Security Architecture experience within telecoms, mobile networks or critical national infrastructure
• Strong understanding of 4G/5G core, RAN, IMS/signalling, OSS/BSS, NFV/SDN, telecom APIs and interconnect security
• Strong AWS cloud security architecture experience
• Knowledge of Zero Trust, identity security, encryption, SIEM/SOC integration and network segmentation
• Experience with telecoms security standards and regulations, including GSMA, NCSC, ISO 27001, NIS/NIS2 and GDPR
• Strong stakeholder engagement and senior-level communication skills