Windows System Administrator

Job Description: Key ResponsibilitiesAdminister, maintain, and support VMware vSphere environments, including ESXi hosts, vCenter Server, HA, DRS, vMotion, and virtual machine lifecycle management.Administer and support Microsoft Hyper-V infrastructure, including failover clustering, live migration, virtual switches, and virtual machine provisioning.Manage and maintain Microsoft Active Directory services, including user accounts, security groups, organizational units (OUs), and Group Policy Objects (GPOs).Install, configure, patch, and support Windows Server operating systems in physical and virtual environments.Manage core Microsoft infrastructure services, including DNS, Certificate Services (PKI), and file and print services.Provision, monitor, optimize, and troubleshoot virtual machines across VMware and Hyper-V platforms.Perform system upgrades, migrations, and infrastructure modernization initiatives with minimal service disruption.Implement and maintain server hardening, security controls, and compliance requirements in accordance with organizational standards.Monitor system performance, availability, and capacity to ensure optimal operation of enterprise infrastructure.Manage backup, recovery, and disaster recovery solutions for server and virtualization environments.Troubleshoot and resolve server, virtualization, authentication, storage, and network connectivity issues.Support high-availability and business continuity solutions to meet organizational uptime requirements.Develop and maintain technical documentation, architecture diagrams, operational procedures, and system inventories.Automate administrative and maintenance tasks using PowerShell and other scripting tools.Collaborate with cybersecurity, networking, and application teams to ensure secure and reliable service delivery.Conduct root cause analysis for system incidents and implement corrective actions to prevent recurrence.Required Skills & TechnologiesVMware vSphere, ESXi, vCenter Server, HA, DRS, vMotion, and vSAN.Microsoft Hyper-V, Failover Clustering, Live Migration, and Hyper-V Manager.Microsoft Active Directory Domain Services (AD DS).Windows Server 2019/2022/2025 administration.Group Policy Management and domain administration.DNS, PKI/Certificate Services.PowerShell scripting and automation.Storage technologies (SAN) and enterprise backup solutions.Server monitoring and performance management tools.Experience with cybersecurity best practices, vulnerability remediation, and system hardening.