Sr. OT Network Engineer (Georgetown, KY)

Gtatelecom; Georgetown (KY); On-site; USD 120,000 - 180,000; Full time

Job summary

Gtatelecom is seeking a Senior OT Network Engineer to design, implement, and maintain secure OT networks across manufacturing environments in the Georgetown, KY area. You will lead Cisco SD-Access deployments, apply zero-trust principles, and collaborate with IT and plant teams to ensure resilient operations on the plant floor.

You will mentor local technical teams, troubleshoot complex incidents, and drive secure networking initiatives across Purdue Model layers, IDMZ, and segmentation

Qualifications

• 10+ years of progressive network engineering experience.
• Hands-on routing, switching, LAN/WAN, and high-availability networks.
• Experience designing or securing OT networks in manufacturing.
• Knowledge of segmentation, zero-trust, and IDMZ design.
• Strong communication and stakeholder collaboration.
• Bachelor’s degree in STEM or equivalent.

Responsibilities

• Deploy and manage OT network infrastructure across industrial environments.
• Design secure architectures using IDMZ and segmentation across Purdue Model layers.
• Implement Cisco SD-Access for fabric automation and identity-based access.
• Troubleshoot complex network incidents and coordinate upgrades and maintenance.
• Collaborate with IT and plant teams to translate needs into secure solutions.
• Mentor local technical teams on OT networking and security.

Skills

10+ years experience

Routing & Switching

OT networks

Network segmentation

Zero-trust security

Communication & stakeholders

Bachelor's degree in STEM

Education

Bachelor’s degree in STEM

Tools

Cisco SDA

DNA Center

Cisco ISE

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.

This is a hands-on technical leadership role for an engineer who can work across IT and plant teams. You’ll shape secure OT network architectures, lead Cisco SD-Access implementation, troubleshoot complex issues, and help other technical teams build confidence in OT networking and security.

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%