Gunika Sharma

• Managed and maintained over 3,000 VMs and more than 270 ESXi hosts across multiple data centers using VMware vSphere 7 and 8.
• Installed, configured, patched, and upgraded ESXi; used VMware Lifecycle Manager, and ESXCLI for lifecycle operations.
• Deployed and upgraded vCenter Servers.
• Conducted P2V migrations using VMware Converter.
• Upgraded firmware for Dell and HPE servers, and performed hardware troubleshooting.
• Configured VMware vSphere Distributed Switch (VDS) across ESXi hosts.
• Administered vSAN clusters, and handled cross-vCenter migrations.
• Deployed physical servers from scratch.
• Enforced firewall restrictions for ESXi management interfaces.
• Upgraded the Windows OS in place and configured Windows Server Failover Clusters (WSFC).
• Troubleshoot Windows Server and OS-level issues, including patching, update failures, driver conflicts, and system stability problems.
• Led hardware replacements in coordination with vendors.
• Carried out performance tuning, resource optimization, and capacity planning.

• Managed VxRail composite code upgrades (vCenter, ESXi, and management components).
• Enforced affinity/anti-affinity rule configurations to optimize performance, improve load balancing, and ensure high availability.
• Upgraded VMware Tools in large VM populations.
• Renewed SSL certificates, and integrated LDAPS with vCenter.
• Monitored server performance and capacity, and resolved VM performance issues.
• Windows Server administration: installation, configuration, troubleshooting.
• Applied security patches via BigFix.

Citrix Infrastructure (Level-1 Support):

• Provided day-to-day L1 support for Citrix Virtual Apps and Desktops (CVAD), handling incidents and service requests.
• Performed troubleshooting of Citrix session connectivity and profile issues.
• Assisted in patching and update rollouts in Citrix farms (XenApp/XenDesktop).
• Managed user account permissions and security settings within the Citrix environment.
• Maintained health monitoring of Citrix infrastructure components, such as StoreFront servers and Delivery Controllers

• Provisioned and managed VMs using templates, hot/cold cloning.
• Managed CPU and memory resource allocation.
• Managed VM snapshot lifecycle; resolved related performance issues.
• Configured and maintained DRS and HA clusters.
• Installed, upgraded, and patched vCenter and ESXi hosts.
• Decommissioned VMs following asset lifecycle policies.

Also held the role of Unified Infra Support (6 months):

• Front-line support for critical infrastructure issues (network, server, storage).
• Owned site outage incidents: created tickets, and coordinated resolution.
• Proactively addressed alerts, noise events, to improve environmental stability.