Senior Network Engineer
On-siteHouston, Texas, United States
Job Summary
Design, implement, and maintain OT network architectures including LAN/WAN, wireless, and industrial segments using Palo Alto firewalls and Moxa switches. Configure, manage, and troubleshoot next-generation firewalls to enforce security policies and segmentation, while diagnosing complex routing, switching, and security issues to minimize downtime. Deploy ruggedized industrial hardware, design VLAN structures and IP addressing plans, and implement High Availability designs for critical infrastructure. Collaborate with controls and cybersecurity teams to integrate PLCs, SCADA systems, and industrial PCs, ensuring resilient, secure OT environments. Document designs, SOPs, and change management records. This role supports ON.energy's mission to scale gigawatt-scale power infrastructure for the AI era.
Required Qualifications
- Expert-level knowledge of network topologies and structured troubleshooting methodology
- Strong hands-on proficiency with TCP/IP, VLANs, routing, switching, subnetting, and NAT
- Demonstrated experience designing and supporting site-to-site and remote access VPNs
- Solid understanding of network security principles and High Availability design
- Experience working within Operational Technology (OT) environments and an understanding of IT/OT network segmentation
- Bachelor's degree in a related field, or equivalent professional experience
Desired Qualifications
- Hands-on expertise with Palo Alto firewalls (policy configuration, App-ID, segmentation, VPN, and monitoring)
- Experience deploying and managing Moxa industrial switches
- Familiarity with Siemens PLCs and industrial control system architectures
- Experience with SEL (Schweitzer Engineering Laboratories) protective relay and communication devices
- Experience networking and supporting Industrial PCs in production/OT environments
- Familiarity with Ignition SCADA platform and its network/architecture requirements
- Proficiency administering both Windows and Linux environments
- Relevant certifications such as PCNSE, CCNA/CCNP, or similar are a plus
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