Network Security Engineer – L3

Key Responsibilities

Design & Architecture

• Design and build secure enterprise network infrastructure across manufacturing and corporate environments.
• Design Cisco-based LAN, WAN, Wireless, and SD-WAN solutions to support business and operational requirements.
• Develop network segmentation strategies for IT and Operational Technology (OT) environments.
• Design secure connectivity solutions between manufacturing sites, data centers, and cloud environments.
• Create high-availability and disaster recovery network architectures.
• Develop network standards, templates, and design documentation.

Build & Implementation

• Build, configure, and deploy Cisco Switching infrastructure (Catalyst platforms).
• Implement and manage Cisco Wireless networks, including controllers, access points, and security policies.
• Deploy and support Cisco SD-WAN solutions across multiple locations.
• Configure and maintain Palo Alto Firewalls, security policies, NAT, VPNs, and threat prevention features.
• Implement Cisco Catalyst Center (DNA Center) for network automation, monitoring, and lifecycle management.
• Execute network refresh, migration, and transformation initiatives.

Operational Technology (OT) Networking

• Design and support OT network infrastructure within manufacturing and industrial environments.
• Implement secure IT/OT network integration while maintaining operational security and compliance.
• Support industrial network segmentation and access controls.
• Collaborate with plant operations teams to ensure high availability of manufacturing systems.

Security & Compliance

• Design and implement network security controls and best practices.
• Manage firewall policies, network access controls, and security monitoring.
• Support vulnerability remediation and network hardening initiatives.
• Ensure compliance with organizational and industry security standards.

Operations & Support

• Provide Level 3 support for complex network incidents and problem management.
• Monitor network performance, capacity, and availability.
• Perform root cause analysis and implement corrective actions.
• Support change management, maintenance activities, and network upgrades.
• Maintain network documentation, diagrams, and operational procedures.

Collaboration & Governance

• Work closely with Infrastructure, Security, OT, and Application teams on network projects.
• Participate in architecture reviews and technology roadmap discussions.
• Provide technical guidance and mentorship to junior engineers.
• Support 24x7 operational environments and critical manufacturing operations.

Required Skills

• Cisco Switching (Catalyst)
• Cisco Wireless
• Cisco SD-WAN
• Palo Alto Firewalls
• Cisco Catalyst Center (DNA Center)
• Enterprise Network Security
• LAN/WAN Architecture & Design
• Network Segmentation
• Manufacturing Environment Experience
• Operational Technology (OT) Network Experience