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Systems Administrator (Security Cleared). Join a specialist technology team delivering mission-critical solutions in highly secure environments. This is a hands-on role where infrastructure, security, and software engineering come together to solve complex, high-stakes challenges.Role Overview:Location: Fareham/Hybrid (2 days per week on site, Thursday & Friday)Day Rate: £450 to £533 per day Inside IR35Start Date: ASAPContract Length: 4 Months initially, with scope for extension.Industry: Secure Technology/Defence/Advanced EngineeringWhat You’ll Be Doing:Designing, building and maintaining secure, air-gapped Linux environments (Rocky 9).Automating infrastructure using Ansible, creating and managing playbooks and offline repositories.Implementing and enforcing robust firewall policies and system hardening standards.Reviewing, validating and improving scripts generated by tools or engineers to ensure security and suitability.Supporting and maintaining C++ development environments within a secure ecosystem.Managing patching processes for air-gapped systems.Overseeing event logging, monitoring and overall system resilience.Ensuring compliance with strict security standards and best practice frameworks.Main Skills Needed:Candidates must hold an active Security Clearance; this is essential. Full UK Driver's License & Access to a vehicle.Strong Linux administration experience, including system hardening and secure configuration.Proven expertise with Ansible, YAML and infrastructure automation in restricted environments.Solid scripting capability (Bash, Python) with the ability to review and valid