Network Engineer L3 (Cisco Wireless & SD WAN)
Job Description: Senior Network Engineer Cisco Catalyst Nexus DNACSDA 9800 Wireless Voice SD-WAN AUNZ Time Zone
Experience: 8-12 years
Location: Bangalore
Shift : Australia Shift Timing (4:30 AM to 01:00 PM IST)
Mode: Hybrid
Role Summary:
We are seeking a Senior Network Engineer 8-12 years experience to support and enhance an enterprise Cisco network environment aligned to Australia East and New Zealand time zones. This is a hands-on role with strong emphasis on Cisco campus switching Catalyst, data center switching Nexus, Cisco DNA Center DNAC with Software-Defined Access SDA, Cisco 9800 wireless, Cisco Voice, and Cisco SD-WAN. Azure networking knowledge is also required.
Key Responsibilities:
- Cisco Campus LAN Catalyst + SDA Design, implement, and operate enterprise campus networks based on Cisco Catalyst switching.
- Troubleshoot complex L2L3 issues across campus environments VLANs, STPMST, EtherChannel, HSRPVRRP, routing adjacencies, QoS, multicast basics as applicable.
- Support Cisco SDA concepts and operations:
- Fabric roles border control-plane nodes, edge nodes
- Virtual networks segments, scalable groups SGTs awareness
- Fabric onboarding and day-2 troubleshooting reachability, policy, authentication dependencies
- Drive standardization, network hygiene, and lifecycle improvements templates, golden configs, upgrades.
- Cisco DNA Center DNAC Operate and support Cisco DNAC for campus assurance, automation, and device lifecycle:
- Provisioning and inventory management
- Template and configuration workflows
- Image management SWIM and compliance checks
- Assurance dashboards, health metrics, and client device troubleshooting Use DNAC tooling to reduce manual effort and improve speed quality of changes.
- Data Center Switching Nexus Support Cisco Nexus switching platforms in data center environments.
- Troubleshoot DC switching routing issues, port-channels, vPC concepts as applicable, and integration with upstream/downstream connectivity.
- Coordinate with compute storage app teams to resolve end-to-end service issues.
- Wireless Cisco 9800 WLC Operate and troubleshoot Cisco 9800 WLC environments.
- Resolve wireless onboarding authentication, roaming, RF performance, and client connectivity issues.
- Support wireless upgrades, configuration standards, and operational monitoring.
- Voice Cisco Collaboration Provide operational support for Cisco Voice services e.g., CUCM and related components depending on the environment.
- Troubleshoot call quality and connectivity issues QoS, latency jitter loss, endpoint network dependencies.
- Cisco SD-WAN Support Cisco SD-WAN operations including overlays, routing behavior, policy intent, and site onboarding.
- Troubleshoot tunnel path issues, segmentation VPNVRF, application-aware routing, and failover behavior.
- Assist with WAN modernization initiatives and controlled rollouts.
- Security Firewall Awareness Demonstrate working understanding of firewall fundamentals policy, NAT, routing, zones, VPN concepts and how security controls impact network flows.
- Partner with security teams for change implementation and troubleshooting across network security boundaries.
- Operations Service Delivery Provide L3-level incident problem management, including RCA and preventative actions.
- Execute changes through structured change management, maintenance windows, and documentation.
- Maintain diagrams, runbooks, standards, and operational procedures. Participate in on-call after-hours support aligned to AU East NZ business hours as required.
Required Skills:
- Experience 8-12 years in enterprise network engineering roles.
- Strong hands-on experience with:
- Cisco Catalyst campus LAN
- Cisco DNAC assurance, automation, lifecycle
- Cisco SDA fabric fundamentals + day-2 ops troubleshooting
- Cisco Nexus data center switching operations
- Cisco 9800 Wireless
- Cisco Voice operational troubleshooting
- Cisco SD-WAN operations troubleshooting Strong troubleshooting skills across L2L3, routing, QoS, resiliency, and service impact analysis.
- Ability to work cross-functionally with security, cloud, and application teams.
Nice-to-Have:
- Basic exposure to Azure networking concepts VNets, subnets, UDRs, NSGs and ExpressRoute awareness helpful but not core.
- Scripting automation fundamentals Ansible/Python or strong interest in network automation.
- Experience with monitoring assurance tools DNAC Assurance, Thousand Eyes, Solar Winds Logic Monitor, etc.. Cisco certifications CCNP Enterprise Data Center Collaboration or equivalent experience.
Behavioral Competencies:
- Strong ownership and disciplined execution clean closure, high-quality changes. Clear communication during incidents and stakeholder updates.
- Structured approach to troubleshooting and RCA creation.
- Documentation-first mindset for standards, runbooks, and repeatable operations.
