Sr. OT Network Engineer (Georgetown, KY)

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

Design and strengthen the networks that keep industrial and manufacturing environments connected and secure. As a Senior OT Network Engineer, you’ll deliver and maintain operational technology infrastructure, apply network segmentation and zero-trust principles, and help ensure resilient plant-floor operations.

Required Skills & Experience

• 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.
• Strong communication, problem-solving, and stakeholder collaboration skills.
• Bachelor’s degree in a STEM field or equivalent experience.

Desired Skills & Experience

• Experience implementing Cisco SD-Access (SDA), DNA Center/Catalyst Center, and Cisco ISE.
• Familiarity with microsegmentation, identity-based access policies, or software-defined firewalls.
• Experience with industrial wireless, next-generation firewalls, or high-availability design.
• Familiarity with industrial protocols such as EtherNet/IP or Modbus.
• Active certifications such as CCNP, CCIE, CISSP, or GICSP.

What You Will Be Doing

• 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.

Tech Breakdown

• OT network architecture and infrastructure lifecycle — 25%
• Cisco SD-Access and fabric implementation — 20%
• Network segmentation and OT security — 20%
• Troubleshooting and escalation support — 15%
• Upgrades, cutovers, and maintenance — 10%
• Collaboration and technical mentorship — 10%

Posted By: Tyler Weston