Senior Windows System Administrator

Position Overview We are seeking an experienced Windows System Administrator to ensure the stability, security, and performance of our IT infrastructure. The role involves managing Windows servers, Active Directory, virtualization, and storage environments, while supporting users and maintaining business continuity through robust backup and disaster recovery processes. Key Responsibilities: Administer Active Directory users, groups, policies, credentials, permissions, access rights and storage allocations. Install, configure, maintain and upgrade Windows Server systems, infrastructure software and supporting components. Manage Windows virtual servers, VMware virtualization and assigned automation for provisioning and repetitive administration. Manage and operate enterprise backup solutions, including Veritas NetBackup where deployed, and validate restore readiness. Implement data-protection, disaster-recovery and failover mechanisms for assigned Windows services. Monitor Windows systems, servers, storage, virtualization, backups, logs, metrics, alerts and service availability, and troubleshoot outages. Apply approved releases, patches, security updates and hardening baselines. Maintain current infrastructure architecture, system documentation, inventories, procedures, specifications, dependency maps, build standards and contingency documentation. Provide technical input and training to IT staff for new infrastructure projects and technologies. Manage systems service-management and infrastructure-management platforms used to administer, monitor and support enterprise systems. Install, support and maintain enterprise server infrastructure, including physical servers, SAN/storage, backup systems, blade infrastructure and related hardware/software. Maintain operating-system and server inventory, support status, licensing, lifecycle plans and replacement priorities. Participate in technology risk assessments, business impact analyses and design reviews for new services, facilities and systems. Manage assigned Web Proxy and email-security infrastructure where retained within the Systems scope, in coordination with Cyber Security and approved ownership boundaries. Ensure production changes follow approved testing, authorization and rollback-controlled change management. Use approved AI to correlate Windows, Active Directory, virtualization, storage, backup and monitoring telemetry to support troubleshooting, alert reduction, abnormal-trend detection and service-health analysis. Use approved AI to assist with controlled PowerShell/automation drafting, technical procedures, diagrams, inventories, checklists, reports and role-based training content from validated internal information. Review, test and approve all AI-generated PowerShell, scripts, commands, configurations and recommendations before production use; security ownership boundaries and change controls remain unchanged, and sensitive production, identity or configuration information must not be submitted to external AI platforms. Continuity and Operational Resilience Responsibilities: Maintain tested recovery procedures for Active Directory, critical Windows servers, virtualization, storage, enterprise backup, systems-management platforms and assigned applications/services. Execute and participate in periodic backup-restoration, failover, infrastructure-recovery and site-recovery tests, and document recovery results and corrective actions. Maintain current system-state/configuration backups, recovery media, installation sources, licenses, build standards and dependency documentation required for recovery. Identify single points of failure, unsupported systems/components, storage or virtualization capacity bottlenecks, and fragile identity/service dependencies. Ensure DR Windows and enterprise systems remain patched, monitored, recoverable and configuration-aligned with production after approved changes. Use approved AI to assist with access/policy drift review, capacity and rightsizing analysis, backup/restore readiness, lifecycle/EOL forecasting, dependency mapping and resilience analysis. Requirements: Bachelor’s degree in Computer Science, Computer Engineering, Information Technology, Information Systems, or a related field. Minimum 5 years of experience in enterprise systems administration. At least 3 years of hands-on experience managing Windows Server and Active Directory environments. At least 3 years of hands-on experience in virtualization, enterprise storage, and backup solutions. Professional Certifications: Mandatory: Relevant Microsoft certification. Mandatory: VMware Certified Professional – Data Center Virtualization (VCP-DCV). Preferred: Veeam Certified Engineer (VMCE) or relevant Veritas certification. Technical Skills & Competencies: Strong expertise in Windows Server, Active Directory, and enterprise IT infrastructure administration. Advanced skills in VMware virtualization, storage systems, and enterprise backup and recovery solutions. Proficiency in PowerShell scripting, automation, infrastructure monitoring, troubleshooting, and performance optimization. Solid understanding of identity and access management, system security hardening, and infrastructure lifecycle management. Experience with IT documentation, change management, and operational best practices. Strong knowledge of disaster recovery, business continuity, infrastructure resilience, and high availability. Excellent analytical, problem-solving, and technical troubleshooting skills. Show more Show less