Looking for a hands-on Linux engineer to support live production systems in a secure environment. Experience: 3 – 5 years Must have SC clearance or be SC eligible Day to day work: * Fix Linux/Unix incidents & outages * Monthly server patching and security updates * Fast response to critical vulnerabilities * Production monitoring and support * Basic infra tasks (server/printer registrations etc.) * Update tickets, changes and evidence in ServiceNow Must have skills: * Strong Linux admin (RHEL / CentOS / Oracle Linux) * Patching with yum/dnf, kernel updates & safe reboots * Troubleshooting CPU, memory, disk, network, services * Log analysis using /var/log and journalctl * Bash scripting for small automations * Understanding of security patches & CVEs * Experience in live production support * Worked with ticketing tools (ServiceNow preferred) * Able to work to SLAs and follow change control * Active SC or eligible to obtain SC clearance Nice to have: * Ansible or similar automation tools * VMware / virtual machines experience * Basic networking & firewall knowledge * Knowledge of containerisation (Docker/Podman/Kubernetes basics) Hands-on role, ideal for a solid mid-level Linux support engineer who can keep production systems stable, secure and compliant.