Expert Network Security Engineer

3 days ago

coimbatore, India beBeeNetwork Full time

Job OverviewDesign, implement and maintain scalable and reliable network infrastructure prioritizing security, reliability and scalability.Lead the design and implementation of Cisco ISE deployments and architecture ensuring seamless integration with RADIUS/802.1X authentication, EAP-TLS, TrustSec policies, TACACS and AAA configuration on NADs.Develop and manage guest/sponsor portals, BYOD onboarding and custom portal solutions for secure and flexible network access.Plan, document and execute Cisco ISE upgrades, patch management, gold star release evaluation and regulatory compliance initiatives.Integrate network systems with Azure, Intune, Active Directory and third-party ecosystems for device identity, application access and security controls.Manage end-to-end certificate lifecycle for network services, ISE portals and device authentication (CSR generation, CA signing, binding, backups and expiry management).Administer TACACS for secure device management and policy-based access to network infrastructure.Automate network management using Python, Ansible and REST APIs; create workflows with Cisco DNA Center (DNAC) and automate inventory sync with CMDB (Freshworks, ServiceNow).Implement and support SD-Access solutions including segmentation, policy deployment and campus fabric operations.Troubleshoot complex wireless and wired network issues, conduct log analysis, resolve authentication failures and optimize LAN/WAN performance.RequirementsAdvanced proficiency in Cisco ISE administration, DNA Center, SD-Access, LAN/WAN, wireless networks and 802.1X protocols.Deep understanding of RADIUS, EAP-TLS, TrustSec, TACACS, AAA policies and NAD configuration.Hands-on experience with ISE portals, certificate management, upgrade procedures, regulatory compliance and security patching.Familiarity with ITSM tools (JIRA, Freshworks/Freshservice, ServiceNow) and cloud integration (Azure, AWS).Proven automation skills using Python, Ansible, REST APIs; experience integrating with ITSM tools (JIRA, Freshworks/Freshservice, ServiceNow) and cloud platforms (Azure, AWS).Strong troubleshooting, documentation and time zone coordination abilities; effective communicator with cross-functional teams.Preferred Qualifications5+ years network/security engineering experience, 3+ years in secure Cisco environments.Certifications: CCNP Security, CCIE or equivalent.

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