Senior OT Network Engineer: Palo Alto & Industrial Security

ON.energy; Houston (TX); On-site; USD 120,000 - 160,000; Full time

Benefits offered by this job

Medical, dental, and vision insurance

401(k) with company match

Paid time off and company holidays

Professional development and growth

Job summary

ON.energy is seeking a Senior Network Engineer to design, secure, and maintain OT network infrastructure across industrial environments, including PLC/SCADA integration. You will work with controls, automation, and cybersecurity teams to ensure resilient connectivity for production facilities.

The role emphasizes hands-on expertise with Palo Alto firewalls, Moxa switches, and OT security best practices, with collaboration across IT/OT domains.

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 OT environments and IT/OT network segmentation.
• Bachelor's degree or equivalent professional experience.

Responsibilities

• Design, implement, and maintain OT network architectures, including LAN/WAN, wireless, and industrial network segments.
• Configure, manage, and troubleshoot Palo Alto next-generation firewalls to enforce network security policy and segmentation between OT zones.
• Deploy and maintain Moxa industrial switches and other ruggedized networking hardware in OT environments.
• Diagnose and resolve complex network issues across routing, switching, and security layers, minimizing downtime in production and industrial settings.
• Document network designs, standard operating procedures, and change management records.

Skills

TCP/IP

VLANs

Routing

Switching

Subnetting

NAT

Site-to-site VPN

Remote VPN

Network security

HA design

Palo Alto

Moxa switches

Siemens PLCs

SEL devices

Ignition SCADA

Windows

Linux

OT networks

Industrial PCs

Education

Bachelor's degree or equivalent experience

Tools

Palo Alto Firewalls

Moxa switches

Siemens PLCs

Ignition SCADA

Windows

Linux

Job description

ON.energy is seeking a Senior Network Engineer to design, secure, and maintain OT network infrastructure across industrial environments, including PLC/SCADA integration. You will work with controls, automation, and cybersecurity teams to ensure resilient connectivity for production facilities.

The role emphasizes hands-on expertise with Palo Alto firewalls, Moxa switches, and OT security best practices, with collaboration across IT/OT domains.