Enterprise Security Architect

Summary: The role of Enterprise Security Architect focuses on delivering secure telecommunications infrastructure within a regulated environment, specifically in mobile networks. The architect will define and evolve security architecture, design secure target-state architectures, and ensure compliance with industry standards. This position requires collaboration with various teams to embed security by design and provide technical assurance across complex programs. The role is hybrid, requiring two days a week on-site in either London or Bristol.

Key Responsibilities:

• Define and evolve enterprise security architecture across mobile telecoms environments.
• Design secure target-state architectures covering 4G/5G Core, Radio Access Networks (RAN), OSS/BSS and enterprise platforms.
• Develop secure architectures for hybrid and AWS cloud environments.
• Apply architecture frameworks including TOGAF, SABSA and ArchiMate.
• Produce enterprise architecture artefacts and security standards.
• Lead security architecture across network virtualisation, SDN/NFV, Open RAN, edge computing and cloud transformation initiatives.
• Conduct threat modelling, security design reviews and risk assessments.
• Develop security reference architectures, patterns and best practice.
• Ensure compliance with industry standards including ISO 27001, NIS/NIS2, GDPR, NCSC guidance and GSMA security frameworks.
• Partner with engineering, operations, architecture and governance teams to embed security by design.
• Provide technical assurance across complex programmes and evaluate emerging technologies and threats.

Key Skills:

• Proven experience as an Enterprise Security Architect within telecoms, mobile networking, defence, military communications, critical national infrastructure or similarly complex networking environments.
• Strong experience designing security architecture across Radio Access Networks (RAN), 4G/5G Core or large-scale network communications platforms.
• Excellent understanding of enterprise security architecture principles and frameworks.
• Hands-on experience with TOGAF, SABSA, ArchiMate, and Enterprise Architecture tooling.
• Strong AWS security architecture experience.
• Knowledge of Zero Trust, IAM, encryption, SIEM, SOC integration and network segmentation.
• Experience delivering security architecture within highly regulated environments.
• Strong stakeholder management and the ability to influence senior technical and business leaders.
• Active SC Clearance is mandatory.
• Desirable certifications: TOGAF Certified, SABSA Certified, AWS Security Specialty or AWS Solutions Architect, CISSP, CISM or equivalent.
• Experience working within telecom operators, defence, emergency services or Critical National Infrastructure.

Salary (Rate): £700 daily

City: London

Country: United Kingdom

Working Arrangements: hybrid

IR35 Status: inside IR35

Seniority Level: undetermined

Industry: IT