Senior Routing & Switching Engineer

Elfonze Technologies; India; On-site; INR 4,000,000 - 6,000,000; Full time

Job summary

Elfonze Technologies in India seeks a Senior Routing & Switching Engineer to lead implementation, migration, and troubleshooting of enterprise and data‑center networks across Cisco, Aruba, and Juniper platforms. This role requires hands‑on execution during complex cutovers and strong architecture awareness.

This position demands expertise in BGP/OSPF, VLANs, VRF, HSRP/VRRP and related high‑availability features, plus capacity to design plans, runbooks, and test scripts while ensuring seamless

Qualifications

• Active CCIE certification mandatory; Enterprise Infrastructure preferred.
• Experience with Nexus, Aruba CX, and Juniper switches across data center and campus environments.
• Hands-on implementation, migration, and troubleshooting of routing/switching in enterprise networks.

Responsibilities

• Design and implement Layer 2/Layer 3 connectivity across data center, campus, and branches.
• Configure and migrate Cisco Nexus, Catalyst, ASR routers; Aruba and Juniper switches as applicable.
• Prepare runbooks, MOPs, rollback plans and post-change validation; conduct RCA after incidents.

Skills

NX-OS

vPC/Port-channel

BGP/OSPF

Data-center switching

Education

CCIE certification

Tools

Nexus switches

Aruba CX

Juniper EX

Job description

Senior Routing & Switching Engineer

PAN India-PwC Locations, India | Posted on 10/13/2026

Cisco Nexus/Catalyst/ASR/8300, Aruba CX and Juniper switching

Role Summary

Senior network engineer responsible for implementation, migration and troubleshooting of enterprise and data-center routing/switching infrastructure across Cisco, Aruba and Juniper platforms. The role requires strong architecture awareness and hands‑on execution during complex network cutovers.

Key Responsibilities / Implementation Scope

• Design, configure and implement Layer 2/Layer 3 connectivity across data center, campus, branch, management, DMZ and external routing environments.
• Configure and migrate Cisco Nexus switching, including Nexus 9504 core, Nexus 9348 access and Nexus 93180YC platforms used in DMZ/access roles.
• Configure and support Cisco Catalyst 8000/9000 platforms, Cisco ASR 1002 and Cisco 8300 series external routers.
• Configure and migrate Aruba switching platforms including CX 6200, CX 6300, CX 8320 and related hardware such as JL479A and JL658A.
• Support Juniper switching where present, including legacy EX3300 and EX2200 devices identified in the environment.
• Implement and troubleshoot BGP, OSPF, static routing, route redistribution, route filtering, VRFs, HSRP/VRRP and policy-based routing as required.
• Configure VLANs, trunks, STP/RSTP/MST, EtherChannel/LACP, port-channels, inter-VLAN routing and network segmentation.
• Support connectivity integration with firewalls, load balancers, wireless, NAC, voice, cloud and security platforms.
• Perform hardware refreshes, network migrations and site/data‑center cutovers with pre-checks, rollback procedures and post‑change validation.
• Conduct packet‑level troubleshooting, routing‑path analysis, interface/error analysis and root‑cause investigation for complex connectivity incidents.
• Prepare implementation plans, MOPs, test scripts, rollback plans, low‑level designs and as‑built documentation.

Required Technical Skills

Area

Required Hands-on Experience

• Nexus 9504, 9348 and 93180YC; NX-OS operations, VLAN/VRF, vPC/port-channel concepts and data-center switching.
• Cisco Routing / Switching – Catalyst 8K/9K, ASR 1002, Cisco 8300 series; enterprise LAN/WAN and external routing.
• Aruba Switching – Aruba CX 6200/6300/8320 and relevant models such as JL479A/JL658A.
• Juniper Switching – Juniper EX3300 and EX2200 operational support and migration exposure.
• Routing Protocols – BGP, OSPF, static routing, route redistribution/filtering, VRF, HSRP/VRRP and policy‑based routing.
• VLANs, 802.1Q trunking, STP/RSTP/MST, EtherChannel/LACP, port‑channel, inter‑VLAN routing and segmentation.
• Troubleshooting – Packet capture, routing‑path analysis, latency/loss analysis, interface errors, convergence and incident RCA.

Certification Requirements

Mandatory: Active CCIE certification is mandatory. CCIE Enterprise Infrastructure is preferred; legacy CCIE Routing & Switching is acceptable where valid/relevant.

Preferred / Advantageous

Additional Cisco data‑center, Aruba switching or Juniper certifications are advantageous.

Low-level network design and port/VLAN/routing configuration workbook

Implementation runbooks and MOPs

Network migration/cutover and rollback plans

Connectivity and failover test scripts with results

As-built diagrams/configurations and operational handover documentation