Our client is seeking a hands-on Senior OT Network Engineer to join their System Solution team. The successful candidate will design and deploy secure, resilient industrial networks leveraging Cisco SD-Access and micro segmentation strategies to ensure zero unplanned downtime across manufacturing environments.
Essential Functions:
- OT Infrastructure Delivery: Lead the deployment, modernization, and day-to-day lifecycle management of OT network infrastructure
- Zero-Trust Network Design: Architect secure industrial networks incorporating IDMZ, macro-segmentation, and granular microsegmentation policies across Purdue Model layers
- SD-Access Implementation: Drive the adoption of Cisco SD-Access (SDA) within the OT environment to automate fabric deployment and enforce identity-based access control
- Operational & Escalation Support: Provide tier-3 troubleshooting for complex network incidents and coordinate major cutovers, upgrades, and maintenance windows
- Mentorship & Collaboration: Translate production requirements for IT and plant teams, while mentoring local IT support on OT network and security fundamentals
Technology Scope:
- Enterprise LAN/WAN and industrial OT network environments
- Cisco SD-Access (SDA) fabric architectures, DNA Center/Catalyst Center, and Cisco ISE
- Microsegmentation (identity-based policies, host-level security, or software-defined firewalls)
- VLANs, routing, switching, redundancy, and Next-Generation Firewalls (NGFW)
- Industrial wireless networks and high-availability design
Plant-floor, automation, and edge systems utilizing industrial protocols (e.g., EtherNet/IP, Modbus)
Requirements
- Bachelor’s degree in a STEM field (or equivalent experience) with 10+ years of progressive network engineering experience
- OT Security Expertise: Proven track record securing manufacturing, industrial, or plant-floor networks using zero-trust frameworks, IDMZ, and segmentation
- Technical Skills: Strong hands-on experience troubleshooting complex routing, switching, and fabric-based network issues in high-availability environments
- Leadership & Communication: Exceptional interpersonal skills with a strong ownership mindset to guide cross-functional technical and non-technical stakeholders
- Preferred Credentials: Active certifications such as CCNP, CCIE, CISSP, or GICSP
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