Senior OT Network Architect: Secure Industrial Fabric

NextGen | GTA: A Kelly Telecom Company; Georgetown (KY); On-site; USD 100,000 - 150,000; Full time

Job summary

NextGen | GTA: A Kelly Telecom Company is seeking a Senior OT Network Engineer to design, deploy, and secure OT network infrastructure across industrial environments. You will implement IDMZ, micro-segmentation, and Purdue Model layering to ensure resilient plant-floor operations and fabric automation.

The role requires deep expertise in OT networks, zero-trust principles, and Cisco SDA/ISE with strong collaboration across IT and manufacturing teams.

Qualifications

• 10+ years of progressive network engineering experience or equivalent practical experience.
• Hands-on experience with routing, switching, LAN/WAN, and high-availability network environments.
• Experience designing or securing OT networks in manufacturing, industrial, or plant-floor settings.
• Knowledge of network segmentation, zero-trust principles, and industrial DMZ (IDMZ) design.

Responsibilities

• Deploy, modernize, and manage OT network infrastructure across industrial environments.
• Design secure network architectures using IDMZ, macro-segmentation, and microsegmentation across Purdue Model layers.
• Implement Cisco SD-Access to support fabric automation and identity-based access control.
• Troubleshoot complex network incidents and coordinate upgrades, cutovers, and maintenance activities.
• Partner with IT and plant teams to translate operational needs into secure network solutions.
• Mentor local technical teams on OT networking and security fundamentals.

Skills

OT networking

Network segmentation

Zero-trust

Industrial DMZ

Cisco SD-Access

Cisco ISE

Stakeholder collaboration

Education

Bachelor's degree in STEM

Tools

DNA Center

Catalyst Center

Job description

NextGen | GTA: A Kelly Telecom Company is seeking a Senior OT Network Engineer to design, deploy, and secure OT network infrastructure across industrial environments. You will implement IDMZ, micro-segmentation, and Purdue Model layering to ensure resilient plant-floor operations and fabric automation.

The role requires deep expertise in OT networks, zero-trust principles, and Cisco SDA/ISE with strong collaboration across IT and manufacturing teams.