Senior Network Engineer (LAN)

Job description

**Role - Senior Network Engineer (LAN)** **Years of Experience - 7 to 12 years** **Location - Bangalore** - **Key Responsibilities** - **Network Operations & Troubleshooting** - Lead advanced (L3) troubleshooting for complex LAN, WLAN, and security-related incidents. - Perform root cause analysis (RCA) for recurring and high-severity network issues. - Provide escalation support to L2 teams and mentor engineers on complex cases. - **Wired & Wireless LAN** - Design, configure, and optimize Cisco enterprise LAN environments (Catalyst switches). - Manage and troubleshoot Cisco Wireless infrastructures (WLCs, Access Points). - Support large-scale campus and site wireless deployments, including performance tuning and RF optimization. - **Network Automation & Visibility** - Operate and maintain Cisco DNA Center (DNAC) for: - Network assurance and health monitoring - Configuration management and compliance - Software image and patch management - Use DNAC insights to proactively identify and remediate network risks. - **Network Security & Access Control** - Configure and support Cisco ISE for: - Network access control (802.1X, MAB) - Policy enforcement and guest access - Integration with wired and wireless networks - Manage firewall platforms (Cisco Firepower / ASA or equivalent): - Firewall policy and rule management - NAT, ACLs, and high-availability configurations - Security incident investigation and response - **Design & Change Management** - Support network design reviews and implementation for new sites or enhancements. - Participate in change planning, risk assessment, and execution for network changes. - Ensure configurations follow security standards and enterprise best practices. - **Transition & Knowledge Transfer Responsibilities** - Actively participate in **network service transitions** , including knowledge transfer (KT) from incumbents or customer teams. - Review and validate **as‑is network architecture, configurations, SOPs, and documentation** during transition phases. - Support **stabilization activities** post‑transition, ensuring smooth handover to steady‑state operations. - Identify gaps, risks, and improvement opportunities during transition and recommend corrective actions. - Collaborate with stakeholders to ensure **operational readiness** , tool onboarding, and access enablement. - **Collaboration & Documentation** - Work closely with customers, vendors, and internal stakeholders. - Engage with OEM TAC (Cisco) for advanced issue resolution. - Maintain accurate network documentation, diagrams, and SOPs. - **Technical Skills** - Cisco Switching: Catalyst series (9K or equivalent) - Cisco Wireless: WLCs and, Access Points - Cisco DNA Center (DNAC): Assurance, automation, compliance - Cisco ISE: NAC, authentication, authorization, guest access - Firewalls: Cisco Firepower / ASA (or equivalent enterprise firewalls) - Strong knowledge of TCP/IP, VLANs, STP, routing basics (OSPF/BGP fundamentals) - **Certifications (Preferred)** - CCNP Enterprise / CCNP Security - Cisco ISE or Wireless specialization (good to have)