Karthikeyan E

• Administered large-scale enterprise IT infrastructure servers, specializing in Windows and VMware environments.

• Windows Server Expertise: Installed and configured Windows Server 2016, 2019, and 2022.

• Server Roles & Features: Configured and managed Active Directory, DNS, DHCP, Print Services, and IIS.

• Active Directory Management: Administered domains, forests, and organizational units (OUs); created and managed user accounts, groups, and Group Policy Objects (GPOs).

• Security Management: Managed user permissions and access controls to maintain compliance and secure server environments.

• Server Maintenance & Troubleshooting: Performed server administration, system monitoring, and troubleshooting to resolve performance, connectivity, and security-related issues.

• Backup & Recovery: Managed Windows Server Backup operations and performed restoration activities to support data protection and business continuity requirements.

• Performance Monitoring: Monitored server performance using Performance Monitor and implemented measures to optimize system efficiency.

• Maintained VMware infrastructure components including ESXi 8.0 and vCenter Server Appliance (VCSA), alongside Windows Server administration.

• Performed virtual machine migrations using VMware vMotion between ESXi hosts, ensuring minimal downtime and maintaining service availability.

• Diagnosed and resolved issues related to VCSA, ESXi hosts, and virtual machines.

• Participated in Change Advisory Board (CAB) meetings, assessing risks, compliance requirements, and resource allocation for infrastructure changes.

• Handled priority incidents (P1, P2) and delivered Root Cause Analysis (RCA) reports to support issue resolution and prevention.

• Executed change requests according to approved schedules, ensuring smooth implementation and minimal business impact.

• Utilized ServiceNow to manage incidents, service requests, and work orders while tracking progress and SLA compliance.

• Enhanced end-user experience by providing timely remote support and resolving technical issues efficiently.

• Supported remote employees by configuring secure VPN connectivity using Zscaler and Ivanti.

• Resolved technical issues for enterprise applications such as SAP, AutoCAD, and Microsoft 365, ensuring minimal downtime and uninterrupted productivity.

• Collaborated with cross-functional teams to resolve escalations, contributing to improved ticket resolution times.

• Coordinated with third-party vendors to address L2 network issues, including outages and hardware replacements involving switches, routers, wireless LAN controllers (WLCs), and access points, ensuring resolution within SLA timelines.

• Assisted users with mobile subscriptions, SIM network concerns, port reliability, and service termination processes through vendor coordination.

• Supported device enrollment and basic administration activities for Windows, Android, and iOS devices through Microsoft Intune.

• Assisted with Mobile Device Management (MDM) and Mobile Application Management (MAM) activities using Microsoft Intune.

• Assisted with Azure subscription and resource administration, including resource group management and resource allocation.

• Supported Azure virtual machines, including provisioning, configuration, monitoring, and basic maintenance.

• Worked with Azure storage services, including storage accounts, storage tiers, and data replication configurations.

• Assisted with Azure networking tasks involving virtual networks, VPN connectivity, load balancers, and network security configurations.

• Monitored Azure resource usage and costs, supporting resource optimization and cost management activities.

• Provided technical support, resolved service requests, and managed escalations related to Azure services.

• Administered Active Directory, including user accounts, groups, Microsoft 365 mailboxes, and distribution lists.

• Managed shared folders and NTFS permissions to ensure secure access to organizational resources.

• Configured Azure AD Connect in a lab environment to synchronize on-premises Active Directory with Azure Active Directory.

• Performed Microsoft 365 administration, including password resets, account management, sign-out enforcement, and service health monitoring.

• Administered Microsoft Teams and Microsoft 365 groups, including creation, modification, restoration, and policy management.

• Managed Azure AD security groups, user properties, and license assignments.

• Maintained password policies and user access management.

• Followed up on incidents and service requests, ensuring timely communication with users and internal teams.

• Troubleshot issues through testing, log analysis, and coordination with support and engineering teams.

• Providing L1, L2 support and co-ordination to users for biometric device.
• Installed Windows 7, 8,8.1 using boot Pen drive
• Supported bio metric related issues PAN India through remote & Tele support.
• Configure and Troubleshoot Bio metric Devices.
• Achievement - Won the performance employer of the year in 2014 for being excellence in delivery support over a year.