Enterprise Security Architect

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.

Key Responsibilities

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

Essential Experience

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
Only candidates based in UK and eligible to work in UK are allowed