RHEL Systems Engineer
On-siteHouston, Texas, United States
Job Summary
Build and maintain a reproducible, turnkey RHEL image tailored for SCADA host needs, including time sync, firewall rules, storage, and resource tuning. Own the end-to-end SCADA container image lifecycle, managing Containerfiles, base images, JVM persistence, and hardening scans. Run containers as systemd services via Podman and quadlets while hardening OS and images to CIS/STIG baselines. Troubleshoot full-stack OS, container runtime, and application behavior remotely or on-site, handing off application-level issues to the SCADA team. Manage host-level networking and firewall configuration (firewalld/nftables) and document runbooks for the OT team. Maintain the Windows image pipeline in steady state with periodic patching and hardening updates.
Required Qualifications
- 7+ years of senior, hands-on production RHEL/Linux engineering
- Container-native delivery: Podman, quadlets/systemd, building and owning container images (including packaging a JVM-based app such as Ignition), and registry management
- Reproducible, turnkey, versioned RHEL image building (bootc, Kickstart, Image Builder/osbuild, or Ansible-driven)
- OS and image hardening to a recognized baseline (CIS/STIG)
- Patch and lifecycle management for restricted/disconnected environments, including offline/mirrored content and registries
- Automation (Ansible) and version control
- Strong Linux networking and diagnostics: firewall administration (firewalld/nftables) and packet/connectivity tooling (Wireshark, tcpdump, ss, ip), plus containerized debug environments (toolbox)
- Confidence operating as the RHEL authority, with strong documentation habits
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