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Infrastructure Security Architect - DV Cleared

Security Architect - Defence / Secure Infrastructure + Long term contract + Outside IR35 + DV Cleared + Hampshire based + Rate on application We are seeking an experienced Security Architect to support the design,…

Outside IR35 IT
Pay rate £700 – £800/day
Contract type Contract
Posted 25 June 2026

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About this contract

Security Architect - Defence / Secure Infrastructure

+ Long term contract

+ Outside IR35

+ DV Cleared

+ Hampshire based

+ Rate on application

We are seeking an experienced Security Architect to support the design, assurance and accreditation of highly secure infrastructure and network environments within a classified defence programme.

Working within a multi-disciplinary engineering team, you will define security architectures, conduct threat modelling and risk assessments, and ensure compliance with stringent security and accreditation requirements across complex IT and networked systems.

Key Skills & Experience

Proven Security Architecture experience within Defence, MOD, National Security or other highly regulated environments.
Strong understanding of secure infrastructure, network and platform architectures.
Experience with:
Network segmentation and zoning
Firewalls, IDS/IPS and boundary security controls
PKI, encryption and key management
Identity & Access Management (IAM/PAM)
Secure-by-Design principles
Threat modelling and security risk assessment
Experience producing security architecture artefacts and supporting accreditation activities.
Knowledge of NCSC guidance, JSP 440, Secure by Design and defence security standards.
Security certifications such as CISSP, SABSA, TOGAF or equivalent desirable.Please note: Due to the highly classified nature of the programme, this role requires full-time onsite attendance in Hampshire

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