Network Security Engineer (Cisco ISE)

Job title: Network Security Engineer (Cisco ISE)

About the Role We are seeking an experienced Network Security Engineer to design, implement, and optimize Corning’s enterprise-grade network solutions globally. The role focuses on Network Access Control using Cisco ISE and secure, automated operations to support reliable and compliant access across diverse environments.

What You'll Do

• Manage and administer Cisco ISE clusters, including design, implementation, and ongoing maintenance.
• Develop, implement, and support Network Access Control (NAC) policies for user and device authorization to meet security compliance requirements.
• Develop RADIUS policies for dynamic VLAN assignment to devices or users as required.
• Develop and support RADIUS-based wireless policies for user/device authentication.
• Support TACACS device manager service for management of enterprise-grade devices.
• Collaborate with other network technologies as needed.
• Maintain and update system certificates associated with ISE authentication processes.
• Troubleshoot ISE performance and end-user authentication issues.
• Develop network designs, documentation, and implementation plans for assigned projects.
• Proactively monitor and audit network events and logs.
• Document work using the ServiceNow ticketing system.
• Participate in after-hours on-call, network maintenance windows, and critical response activities.

What We're Looking For

• Experience administering Cisco ISE and managing ISE clusters; strong knowledge of Network Access Control (NAC) policies and RADIUS.
• Hands-on experience with dynamic VLAN assignment and RADIUS policies; wireless authentication policies.
• Experience with TACACS device manager and enterprise-grade device management.
• Familiarity with automation and API integration to support Infrastructure as Code (IaC)-driven operations.
• Ability to troubleshoot authentication issues and ISE performance; strong documentation and ticketing (ServiceNow).
• Comfortable collaborating across diverse environments and with cross-functional teams.
• Willingness to participate in after-hours support and on-call rotations.
• Knowledge of security compliance requirements.

Nice to Have

• Familiarity with OT or manufacturing environments is a plus.

Compensation & Benefits

• Not disclosed.