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