Varun V

• Designed and Implemented Multi-Site Data centre architectures, including complex routing and switching topologies (OSPF, BGP) across multi-location environments, ensuring high availability and scalability.
• Configured and Managed Routing Protocols and Firewalls: Expertise in OSPF, BGP, VLANs, ACLs, and firewall configurations (Palo Alto, Juniper SRX), optimizing network security, segmentation, and performance.
• Handled Load Balancer Configuration: Configured and troubleshoot F5/A10 load balancers, managing VIPs, SSL certificates, pools, and iRules via CLI to ensure optimal traffic distribution and redundancy.
• Managed Network Operations and Migrations: Led data centre migrations and construction of new switches, including decommissioning/replacement of switches and load balancers (Cisco, Brocade, A10, F5), ensuring seamless transition and minimal downtime.
• Automated Network Deployments and Troubleshooting: Leveraged Ansible and Git for network automation, reducing manual configurations by 30%, while utilizing Wireshark and advanced troubleshooting techniques to resolve complex network issues.

• Directed Network & Cloud Infrastructure Projects: Managed the hybrid construction of data centres and cloud projects, ensuring seamless network integration and reliability across multi-site environments. Collaborated with cross-functional teams to optimise performance and scalability for both on-prem and cloud infrastructure.
• Performed root cause analysis to provide resolutions for production issues.
• Mentored junior engineers in advanced concepts, fostering professional development within the team.

• Worked as Network Engineer part of Network Operation Team in a core Data Center environment, which provides their Pharma services for customers all over the world, 3 Data Centers 150+ WAN sites and several branches spread across the globe.
• Responsible for “Change Coordinator (Change owner DC) – Network.
• Work on requested changes using Service NOW tool.
• Work as part of Migration team and performed Migration of 100+ Catalyst 3750 to Catalyst 2960 XR switches.
• Manage Application certificates, Load balancing using F5 load balancer.
• Migrated the Aruba 6.X Version to 8.X Version for 20+ Sites using Aruba Migration Tool
• Upgraded Data Center Nexus 9k devices and Nexus 5k devices to Latest version.
• Working on DHCP servers like creating scope, reserving IPs with MAC, deleting the IP reservations using DHCP server and as well as with Efficient IP.
• Configuring and troubleshooting ISP links and coordinating with vendors according to the issues
• Maintain network infrastructure of data center by managing routers and switches keeping them UP and running with the help of field support team
• Implement change requests for change of customer requirements (Vlan Creations and Static route towards firewall.
• Troubleshoot LAN connectivity, server reachability issues.
• Troubleshooting wireless related issues like WAP down, connectivity related issues and WLC issues and provisioning the New AP
• Milestones Achieved:
• Performed Migration of 100+ Catalyst 3750 to Catalyst 2960 XR switches.
• Performed switch replacements of 2960XR as part of Cisco POE bug project
• Migrated Critical sites Aurba OS from 6.X to 8.X without any impact to the sites.
• Conducted Network Training for New Joiners
• Upgraded Aruba Controller (MD) to the latest version
• Upgraded 3850 Switches in Bundle and Install mode
• Enhanced team collaboration by providing clear communication of complex findings through visualizations and reports.

• Worked as Network Engineer part of Network Operation Team in a core Data Center environment, which provides their financial services for customers all over the world, 7 MAN Sites, 29 WAN sites and several branches spread across the globe.
• Responsible for “Change Coordinator (Change owner DC) – Network and security”.
• Work on requested changes using Service NOW tool.
• Work as part of TechRefresh team and performed Nexus 5k up gradation activity.
• Manage Bluecoat Proxy. Modify rules, Bypass or Deny traffic based on SNOW requests.
• Manage Application certificates, Load balancing using F5 load balancer.
• Perform network monitoring using tools like e-Health, HP-NNMi.
• Upgraded EP Regional site switches for recommended version to avoid vulnerability.
• Upgraded and Configured many automation tasks using Backbox tool
• Milestones Achieved:
• Successfully upgraded all the Nexus switches with Latest OS to avoid vulnerabilities.
• Upgraded 12 sites Meraki MS series switches to the latest version.
• Successfully maintained 4 circles for two years as an owner without any Major incident.
• Performed DR Drill activity as an owner from network team.
• Upgraded Cisco Prime Infrastructure tool to latest version.
• Upgraded all 25 sites WLC to the latest version.
• Conducted Network Training for New Joiners, Monitoring and MIM team.
• Got ‘A’ performance in yearly appraisal and also received twice Best Team award in DCS.
• Suggested and Implemented 8 CSI’s in which 2 got the best CSI of month.