Senior System Administrator

Job Summary We are looking for an experienced Senior System Administrator with strong expertise in Windows Server Administration, Active Directory, DNS/DHCP, and enterprise virtualization platforms. The ideal candidate will have hands-on experience with VMware and Microsoft Hyper-V and will be responsible for managing and optimizing large-scale IT infrastructure environments. Experience in manufacturing or plant IT environments will be preferred, and knowledge of Manufacturing Execution Systems (MES) will be considered an added advantage. The role involves designing, implementing, securing, and supporting enterprise IT systems while ensuring high availability, scalability, performance, and compliance. A basic working knowledge of Linux environments is also required to support hybrid infrastructure environments. Key Responsibilities 1. Windows Server Management Install, configure, upgrade, and maintain Windows Server environments across physical and virtual platforms. Manage Group Policy Objects (GPOs) and server roles including Active Directory, DNS, DHCP, File & Print Services. Perform patch management, system hardening, backup, and recovery operations. Monitor server performance and ensure system stability and availability. 2. Active Directory Administration Design, implement, and manage Active Directory forests, domains, trusts, and replication. Administer user accounts, security groups, OU structures, and role-based access controls. Ensure domain security, policy enforcement, and troubleshooting of AD-related issues. 3. DNS & DHCP Administration Configure and manage DNS zones, records, and DHCP scopes. Monitor and troubleshoot name resolution, IP allocation, and network integration issues. 4. Virtualization & Hypervisor Management Manage enterprise virtualization platforms including VMware and Microsoft Hyper-V. Provision and manage virtual machines, resource allocation, and capacity planning. Monitor and troubleshoot virtual infrastructure performance and availability. 5. Infrastructure Operations & Availability Ensure high system reliability, availability, and disaster recovery readiness, especially for business-critical systems. Monitor infrastructure performance and implement preventive maintenance and optimization. Manage server hardware, storage systems (SAN/NAS), and clustering solutions. 6. Security & Compliance Implement and maintain security hardening standards for servers and virtual environments. Support internal and external audits, vulnerability remediation, and IT policy compliance. Work closely with manufacturing/plant teams to support OT–IT integration and production system availability. Support infrastructure requirements for manufacturing applications and MES platforms, where applicable. 7. Incident, Change & Problem Management Provide L3-level support for complex infrastructure and system issues. Conduct root cause analysis (RCA) and coordinate with vendors/OEMs for issue resolution. Participate in change management, documentation, and continuous service improvement initiatives. Qualifications & Skills Bachelor's degree in Computer Science, Information Technology, or a related field. 7+ years of experience in IT Infrastructure and System Administration. Strong hands-on expertise in Windows Server Administration. In-depth knowledge of Active Directory, Group Policy, DNS, DHCP, and Domain Controllers. Strong experience with virtualization platforms such as VMware and Microsoft Hyper-V. Basic working knowledge of Linux operating systems (user management, services, logs, and troubleshooting). Familiarity with SAN/NAS storage, server clustering, and enterprise backup solutions (e.g., Veeam, Commvault). Experience in PowerShell scripting for automation and administrative tasks. Exposure to manufacturing or plant IT environments will be preferred. Knowledge of Manufacturing Execution Systems (MES) will be an added advantage. Preferred Certifications Microsoft Certified: Windows Server Hybrid Administrator Associate / MCSE / MCSA VMware / Hyper-V Virtualization Certifications