ON.energy
Sr. RHEL Systems Engineer, OT/SCADA
Houston, Texas, United States · Senior
Sponsorship not specified$82k-$800kDetected 15 days ago
Full-Stack DevelopmentAnsibleLinuxCybersecuritySystems EngineeringDNSFirewallWiresharkSCADA
About the role
- Our systems are already deployed across 2.5 GW of hyper-scale campuses, validated by top U.S. national labs, and certified for grid-safe operation by major utilities.
- ROLE SUMMARY NOTE: This position is a hybrid working environment from one of our 3 major US based offices: Houston, Miami, Reston VA.
- On the network side, the host firewall and OS-level networking (interfaces, routing, DNS, firewalld/nftables) are yours, while the physical and site network beyond the host NIC belongs to Operational Technology (OT).
Responsibilities
- Build, version, and maintain a reproducible, turnkey RHEL image tailored to the SCADA host's needs (time sync, firewall/ports, storage, service ordering, resource tuning).
- Own the SCADA container image end to end: Containerfile, base image, JVM, persistence, ports, hardening, scanning, and registry.
- Own host-level networking and firewall configuration (interfaces, routing, DNS, firewalld/nftables, and port exposure for the SCADA container), and lead connectivity troubleshooting between the host and site infrastructure.
- Document runbooks for the OT team and help define the connectivity and security posture.
- Maintain the Windows image pipeline (Packer-based) in steady state once established: periodic patching, hardening updates, and image rebuilds.
- 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).
Requirements
- 7+ years of senior, hands-on production RHEL/Linux engineering.
- Based in the Houston, TX area preferred for hybrid schedule environment.
- Available to travel to sites for on-site support (20%), and to provide remote support for production issues.
- Able to meet third-party data-center access requirements (background check, badging, host-facility protocols) and represent the company professionally on-site.
Nice to have
- Confidence operating as the RHEL authority, with strong documentation habits.
- OT/ICS or SCADA exposure and frameworks (IEC 62443, NERC CIP, NIST 800-82).
- Familiarity with Ignition specifically.
- Windows image automation (Packer) and Windows patching/hardening familiarity.
- RHCSA / RHCE / RHCA certifications.
- Strong Linux networking and diagnostics: firewall administration (firewalld/nftables) and packet/connectivity tooling (Wireshark, tcpdump, ss, ip), plus containerized debug environments (toolbox).
Compensation
- Competitive salary + annual performance-based bonus eligibility
Benefits
- Competitive salary + annual performance-based bonus eligibility
- Medical, dental, and vision insurance
- Paid time off and company holidays
- Competitive salary + annual performance bonus eligibility
- Major medical expenses and life insurance
- Paid time off and holidays (per local policy)
- Christmas Bonus (Aguinaldo): 30 days
- Benefits vary by role and location and are subject to change.
Company info
- 401(k) with company match
Equal opportunity
- ON.energy is committed to equal employment opportunity and to maintaining a work environment free of harassment, discrimination, or retaliation.
- Accommodations: If you need an accommodation during the application process, email recruitment@onenergystorage.com
- Equal Opportunity: ON.energy is committed to equal employment opportunity and to maintaining a work environment free of harassment, discrimination, or retaliation.
- Accommodations: If you need an accommodation during the
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