Wintel Infrastructure Administrator

About the role

The Wintel Infrastructure Administrator provides 24x7 on‑call support for Windows‑based infrastructure and Microsoft 365 services across multiple sites. This role acts as the primary Level 3 escalation point, handling complex incidents, root‑cause analysis and preventive actions.

Key responsibilities

• Provide 24x7 on‑call support for Wintel infrastructure and Microsoft 365 services.
• Serve as the Level 3 escalation point for incidents and service requests.
• Perform root‑cause analysis and implement corrective actions for major incidents.
• Administer multi‑domain Active Directory forests, DNS, DHCP, Group Policy and replication.
• Configure and manage Microsoft Configuration Manager (SCCM) environments.
• Design, implement and maintain VMware vSphere Foundation 9.x and vCenter 7.x infrastructure, including HA, DRS, vMotion and cluster management.
• Handle VMware lifecycle tasks such as upgrades, patching, migrations and disaster‑recovery testing.
• Manage Microsoft 365 services (Exchange Online, SharePoint Online, Teams, OneDrive) and security features (Defender, SPF, DKIM, DMARC).
• Administer Citrix ADC and Citrix Virtual Apps environments.
• Maintain enterprise antivirus, endpoint security, DLP, PKI and certificate lifecycle.
• Create and manage Group Policy Objects for security and compliance.
• Support Windows Failover Clusters for SQL and application workloads.
• Maintain print servers, file sharing services and Dell PowerEdge hardware.
• Develop PowerShell automation scripts and keep technical documentation up to date.

Required profile

• Strong hands‑on experience with Windows Server (2008‑2025) administration.
• Extensive experience in Active Directory, DNS, DHCP and Group Policy management.
• Proven expertise in VMware vCenter Server, ESXi, HA, DRS, vMotion and cluster administration.
• Solid background with Citrix ADC and Citrix Virtual Apps.
• Experience managing Microsoft 365 services and security configurations.
• Ability to perform root‑cause analysis and lead incident resolution.

Required skills

• Windows Server (2008‑2025)
• Active Directory, DNS, DHCP, Group Policy
• VMware vSphere (vCenter, ESXi, HA, DRS, vMotion)
• Citrix ADC, Citrix Virtual Apps
• Microsoft 365 (Exchange Online, SharePoint Online, Teams, OneDrive)
• SCCM
• PowerShell scripting
• Dell PowerEdge server hardware
• PKI/Certificate Services
• Data Loss Prevention (DLP)
• Antivirus/Endpoint Security solutions
• Windows Failover Clustering