Overview We are seeking a DV-cleared IT Administrator to support the operation and assurance of a secure infrastructure environment aligned with FCAS (Future Combat Air System) cyber requirements and Air Sector security standards. This role is hands-on and operational, working at the heart of a highly secure, mission-critical environment to ensure systems remain compliant, resilient, and ready for use. Key Responsibilities Access, Network andamp; Security Controls Validate and maintain user and administrative access controls, ensuring least-privilege principles are enforced. Review and validate Firewall and IDS/IPS rules, ensuring secure configuration and effective threat protection. Support secure configuration and ongoing compliance of infrastructure components. Patch Management andamp; Vulnerability Management Schedule, apply, and validate security patches across infrastructure environments. Run and support vulnerability scanning, validating results and supporting remediation activities. Track patching status and provide evidence to support assurance and accreditation activities. Resilience, Backup andamp; Recovery Test and validate backup and restore procedures to ensure data integrity and recoverability. Validate and support disaster recovery plans, contributing to operational resilience and readiness. Assist with recovery testing and assurance activities as required. Documentation andamp; Knowledge Transfer Document all activities clearly to support knowledge tra