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Dheeraj Kumar

@dheerajkumar21

Senior Wintel Administrator supporting enterprise Windows infrastructure and automating administration with PowerShell.

As a Freelancer, I support enterprise Windows infrastructure across production and disaster recovery environments, including VMware virtualization and Azure hybrid infrastructure. I use PowerShell to automate administrative tasks, reducing manual workload by about 35%.

At Proso AI Technology Pvt Ltd, I supported Windows infrastructure, server migrations, and backup and recovery for the CDP Worldwide project. I also managed Exchange Online, Office 365, and Azure AD/Entra ID for 700+ users.

At HCL Technologies Ltd., I administered Windows servers and Active Directory for the LANXESS Inc. project. I also automated repetitive tasks with PowerShell, reducing manual effort by 40%.

Experience

Work history, roles, and key accomplishments

Current

Senior Wintel Admin

Current

Freelancer

Jun 2023 - Present (3 years 4 months)

Managing and supporting enterprise Windows infrastructure with 1000+ servers across production and disaster recovery environments. Handling VMware virtualization, patch management, Azure hybrid infrastructure, and backup solutions.

Windows Server Active Directory VSphere VMware ESXi VCenter SCCM WSUS Azure AD Entra ID RBAC Conditional Access Datto Backup Veeam PowerShell L3 Support RCA

Senior IT Consultant (Infra Support)

Proso AI Technology Pvt Ltd

Nov 2022 - Jun 2023 (7 months)

Installed, configured, and maintained Windows Server and related services. Managed DNS, DHCP, AD replication, and domain controller health checks, and provided L2/L3 support for infrastructure incidents.

Windows Server DNS DHCP Active Directory Veeam NetBackup Exchange Online Office 365 Azure AD Entra ID FSMO Roles L2 L3 Support Root Cause Analysis

Technical Specialist (AD/Entra ID)

HCL Technologies Ltd.

Dec 2021 - Nov 2022 (11 months)

Administered 500+ Windows servers across production and DR environments. Managed Active Directory, OU structure, Group Policies, and user access controls, and automated tasks using PowerShell.

Windows Server Active Directory Group Policy WSUS SCCM VMware ESXi VCenter SCOM Solarwinds PowerShell

Sr. SD Analyst (Hybrid Infra)

Proso AI Technology Pvt Ltd

Aug 2021 - Dec 2021 (4 months)

Administered Windows/Linux servers, performed regular patching, and improved system stability. Managed Exchange Online, Office 365, and Azure AD/Entra ID for 700+ users.

Windows Server Linux Exchange Online Office 365 Azure AD Entra ID FSMO Roles Veeam L2 L3 Support Root Cause Analysis

Assistant Manager-IT (Infra Engineer)

NY Cinemas LLP

Dec 2019 - Aug 2021 (1 year 8 months)

Installed, configured, and maintained Windows Server and related services. Managed DNS, DHCP, AD replication, and domain controller health checks, and configured backup operations using Veeam and Datto Backup.

Windows Server DNS DHCP Active Directory Veeam Datto Backup L2 L3 Support Virtualization

Assistant Manager-IT (AD Admin)

Stargaze Entertainment Pvt. Ltd

Mar 2011 - Nov 2019 (8 years 8 months)

Supported Windows server environments and desktop troubleshooting. Assisted with Active Directory user administration and permissions, and handled ticketing through ServiceNow.

Windows Server Active Directory Desktop troubleshooting ServiceNow ITIL