Experience securing RHEL technologies including SELinux, firewalld or nftables, auditd, PAM, systemd, SSH, cryptographic policies, file permissions, and centralized logging and interpreting and implementing STIGs, Security Requirements Guides, CIS Benchmarks, or security baselines, including translating manual requirements into idempotent automation. The position requires hands-on experience securing containerized workloads and Docker Swarm environments, integrating security controls and validation tools into CI/CD pipelines, and operating within Department of Defense or similarly regulated environments.