Senior OT Network Architect—Secure Industrial Networking

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

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.