Network Engineer

ON.energy is setting the standard for large load interconnection. ON’s patented AI UPS™ is a medium-voltage UPS that serves as a firewall, protecting the data center from the grid, and the grid from the data center. With multiple gigawatts currently under construction, we are enabling grid-safe data centers. 

ON.energy is seeking a Senior Network Engineer to design, secure, and maintain network infrastructure of Operational Technology (OT) environments. This role requires deep expertise across network topologies, troubleshooting, and security, with a strong preference for hands-on experience securing industrial control networks using Palo Alto firewalls and Moxa switches. 

KEY 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. 
• Design and maintain VLAN structures, subnetting schemes, and IP addressing plans across OT networks. 
• Configure and manage NAT, VPN tunnels, and site-to-site/remote access connectivity. 
• Implement and maintain High Availability (HA) network designs to ensure resilience of critical infrastructure. 
• Apply network security best practices, including segmentation, access control, monitoring, and hardening of OT networks. 
• Collaborate with controls, automation, and cybersecurity teams to support integration of PLCs, SCADA systems, and industrial PCs onto the network. 
• Document network designs, standard operating procedures, and change management records. 

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. 

PREFERRED QUALIFICATIONS