Job Summary We are looking for an experienced Core Network Engineer to support a large-scale APAC Network Fleet Management Program involving Cisco Nexus hardware refreshes, Arista MOS-to-EOS migrations, and Cisco Catalyst/Nexus management network refresh activities across multiple global data centers. The engineer will be responsible for planning, migration execution, configuration management, validation, troubleshooting, and technical ownership throughout the project lifecycle. Job Location - Mumbai (Chandivali)Responsibilities Planning &
Discovery Participate in technical discovery workshops. Validate device inventory, interface mappings, and network topology. Review configuration baselines and migration prerequisites. Assess site-specific technical dependencies.

Network Migration Execute Cisco

Nexus 3172 hardware refreshes.

Perform

Arista 7130 MOS to EOS migrations.

Refresh Cisco

Catalyst 3850 &
Nexus 3048 management networks. Execute software upgrades and firmware migrations. Manage switch reloads and maintenance window activities.

Configuration Management

Take complete configuration backups. Capture routing tables, MAC tables, STP topology, CPU &
Memory utilization. Stage software images via SFTP/HTTPS. Push production configurations during cutover.

Validation





Verify BGPOSPFVLANs Port Channels Interface status Optical links Trunk configurations TACACS+RADIUSMFASNMPSyslog Troubleshooting Analyze routing issues. Interface flaps. Packet drops. Optical failures. Hardware issues. Boot failures. OEM escalation (Cisco TAC / Arista TAC).

Documentation

Prepare operational runbooks.

Update Fleet Execution

Tracker. Capture CLI logs. Prepare validation reports. Support project closure documentation.

Required Technical Skills Networking Cisco

Nexus 3 K Series Cisco Catalyst 3850 Nexus 3048 Arista 7130 Routing &
Switching BGPOSPFSTPVLANVPCPort Channel VRFOperating Systems Cisco NX-OSArista EOSMOS Migration Network Services TACACS+RADIUSAAASNMPSyslog NTPSSHManagement OOB Network Console Servers Maintenance Window Execution Change Management Rollback Planning Protocol Knowledge L2/L3 Switching Routing Interface Troubleshooting Optics Transceivers Tools Secure CRT / Putty SFTPWin SCPExcel Jira Service Now (preferred)Qualifications6–10 years of Network Engineering experience.

Experience in Data Center migration projects.

Cisco

Nexus implementation. Arista EOS administration. Hardware refresh projects. Production maintenance window execution.

📌 Core Network Engineer Mumbai
🏢 NuSummit
📍 Mumbai