Senior System Admin Expert (Kolkata)

We are looking for an experienced Senior System Admin Expert to manage, configure, and support enterprise Microsoft infrastructure environments & has knowledge in Linux. The ideal candidate will have strong expertise in Windows Server administration, client Windows environment configuration, Hyper-V virtualization, and Active Directory management. This role involves maintaining secure, scalable, and high-performing IT infrastructure while supporting end-user computing environments across the organization. Key Responsibilities Windows Server Administration - Install, configure, and maintain Windows Server environments. - Manage server roles, updates, performance tuning, and system monitoring. - Perform server patching, upgrades, and troubleshooting. - Ensure server security, availability, and reliability. Client Windows Workplace Management - Configure and support client Windows environments across the organization. - Deploy and manage Windows 10/11 systems. - Implement and maintain Group Policies (GPOs) for endpoint management. - Support user profile management, domain joining, and endpoint security configurations. - Troubleshoot workstation hardware, software, and connectivity issues. - Client communication and documentation - Prepares technical planning, server architecture, configuration standards, implementation steps. Active Directory Administration - Manage Active Directory, DNS, DHCP, and Group Policies. - Create and maintain user accounts, permissions, and organizational units. - Handle authentication, access control, and security policy implementation. - Monitor and troubleshoot AD replication and login issues. Hyper-V Virtualization - Configure and manage Hyper-V infrastructure and virtual machines. - Monitor virtualization performance and optimize resources. - Support VM backup, migration, and disaster recovery processes. - Maintain virtual networking and storage configurations. Infrastructure & Security - Implement backup and disaster recovery s .