Sr. OT Network Engineer (Princeton, IN)

NextGen | GTA: A Kelly Telecom Company; Princeton (IN); On-site; USD 120,000 - 180,000; Full time

Job summary

NextGen | GTA: A Kelly Telecom Company seeks a Senior OT Network Engineer to design, deploy, and secure operational technology networks across industrial environments. You will lead design of IDMZ, macro- and micro-segmentation, and drive Cisco SD-Access deployments to enable fabric automation.

You will collaborate with IT and plant teams, troubleshoot complex incidents, mentor local engineers, and translate operational needs into secure, resilient network solutions for Purdue Model layers.

Qualifications

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

Responsibilities

• Deploy, modernize, and manage OT network infrastructure across industrial environments.
• Design secure network architectures using IDMZ, macro-segmentation, and micro-segmentation 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

Extensive network engineering

Routing & Switching

OT networks in manufacturing

Segmentation & IDMZ

Communication & collaboration

Education

Bachelor’s degree in a STEM field or equivalent experience

Tools

Cisco SDA

DNA Center

Cisco ISE

Industrial DMZ design

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%

Posted By: Tyler Weston