Wintel Infrastructure Administrator

Wipro; Singapore; On-site; SGD 100,000 - 150,000; Full time

Job summary

Wipro is seeking a seasoned Windows/Datacenter Administrator to provide 24x7 on-call support for Wintel and Microsoft 365 across multi-site environments. You will serve as the L3 escalation point, perform RCAs, and implement preventive actions. The role covers AD forests, DNS/DHCP, GPOs, SCCM, VMware vCenter, Citrix ADC/Apps, and M365 Defender management.

Experience with PowerShell automation and robust documentation is required to drive operational efficiency and security/compliance.

Qualifications

• Strong hands-on experience in Windows Server Administration (2008/2012/2016/2019/2022/2025).
• Strong hands-on experience in Active Directory, DNS, DHCP and Group Policy.
• Strong hands-on experience in VMware vCenter Server and ESXi Administration.
• Strong hands-on experience in VMware HA, DRS, vMotion and Cluster Management.
• Strong hands-on experience in Citrix ADC and Citrix Virtual Apps Administration.
• Strong hands-on experience in Microsoft Configuration Manager (SCCM).
• Strong hands-on experience in Microsoft Office 365 Administration including Exchange Online, SharePoint Online, Teams and OneDrive.
• Good understanding of Microsoft 365 Defender, SPF, DKIM and DMARC.

Responsibilities

• Provide 24x7 on-call support for Wintel infrastructure and Microsoft 365 across multiple sites.
• Act as Level 3 escalation point for infrastructure incidents and service requests.
• Perform RCA and implement corrective/preventive actions for major incidents.
• Administer Active Directory Forests with multiple domains and sub-domains.
• Troubleshoot AD, DNS, DHCP, and Group Policy issues.
• Design, implement and maintain SCCM environments.
• Design, implement and maintain VMware vSphere/vCenter infrastructure including HA/DRS/vMotion.
• Perform VMware lifecycle management, upgrades, patching, migrations and DR activities.
• Manage and maintain Microsoft 365 services including Exchange Online, SharePoint, Teams and OneDrive.
• Administer Microsoft 365 Defender, email security, SPF, DKIM and DMARC configurations.
• Configure, administer and troubleshoot Citrix ADC and Citrix Virtual Apps.
• Administer endpoint security solutions and data protection policies.
• Manage PKI, certificate lifecycle, GPOs for security/compliance.
• Create and maintain PowerShell automation scripts and operational docs.

Skills

Windows Server Admin

Active Directory

DNS, DHCP, GPO

VMware vCenter/ESXi

DRS, vMotion

Citrix ADC & Virtual Apps

SCCM

Office 365 Admin

Microsoft 365 Defender

PowerShell scripting

Tools

VMware vCenter Server

SCCM

Citrix Virtual Apps

Citrix ADC

PowerShell

Job description

• Provide 24x7 on-call support for Wintel infrastructure and Microsoft 365 services across multiple sites.
• Act as the primary Level 3 escalation point for infrastructure related incidents and service requests.
• Perform Root Cause Analysis (RCA) and implement corrective and preventive actions for major incidents.
• Administer enterprise Active Directory Forest environments with multiple domains and sub-domains.
• Troubleshoot Active Directory, DNS, DHCP, Group Policy and replication related issues.
• Implement, configure and administer Microsoft Configuration Manager (SCCM) environments.
• Design, implement and maintain VMware vSphere Foundation (VVF) 9.x and vCenter 7.X infrastructure including vCenter Server, ESXi hosts, clusters, HA, DRS, Datastores and vMotion.
• Perform VMware lifecycle management, upgrades, patching, migrations and disaster recovery activities.
• Manage and maintain Microsoft 365 services including Exchange Online, SharePoint Online, Teams and OneDrive.
• Administer Microsoft 365 Defender, email security, SPF, DKIM and DMARC configurations.
• Configure, administer and troubleshoot Citrix ADC and Citrix Virtual Apps environments.
• Administer and maintain enterprise Antivirus and Endpoint Security solutions.
• Configure and maintain Data Loss Prevention (DLP) solutions and policies.
• Administer and maintain Public Key Infrastructure (PKI), Certificate Services and certificate lifecycle management.
• Create, configure and maintain Group Policy Objects (GPO) for operational, security and compliance requirements.
• Manage Windows Failover Clusters supporting SQL and application environments.
• Administer Print Servers and enterprise file sharing services.
• Manage Windows Server upgrades, migrations, patching and lifecycle management.
• Manage and maintain enterprise datacentre infrastructure including physical Dell PowerEdge servers and infrastructure appliances.
• Perform server hardware troubleshooting, firmware upgrades, hardware refresh and lifecycle management activities.
• Perform datacentre operations, disaster recovery testing, failover exercises and infrastructure maintenance activities.
• Develop and maintain PowerShell automation scripts to improve operational efficiency and reporting.
• Maintain technical documentation, SOPs, architecture diagrams and operational standards.
• Provide technical guidance, knowledge transfer and support to L1/L2 support teams.
• Support End User Computing Team when any issues are escalated and need support for L2/L3.

Skills

Required

• Strong hands-on experience in Windows Server Administration (2008/2012/2016/2019/2022/2025).
• Strong hands-on experience in Active Directory, DNS, DHCP and Group Policy.
• Strong hands-on experience in VMware vCenter Server and ESXi Administration.
• Strong hands-on experience in VMware HA, DRS, vMotion and Cluster Management.
• Strong hands-on experience in Citrix ADC and Citrix Virtual Apps Administration.
• Strong hands-on experience in Microsoft Configuration Manager (SCCM).
• Strong hands-on experience in Microsoft Office 365 Administration including Exchange Online, SharePoint Online, Teams and OneDrive.
• Good understanding of Microsoft 365 Defender, SPF, DKIM and DMARC.