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Omar Hernandez

@omarhernandez1

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Systems Administrator at Atos who supported 3,500+ servers and automated infrastructure operations with PowerShell.

United States

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What I'm looking for

I'm seeking remote positions anywhere in the USA.

At Atos, I managed Windows Server and VMware infrastructure across a 3,500+ server healthcare environment for Baylor Scott and White Health. I supported business-critical operations and Azure-connected systems.

At the FBI, I designed and deployed virtual desktop infrastructure supporting 50,000+ endpoints. I used VMware vSphere, Citrix XenDesktop, and PowerShell across a multi-enclave classified environment.

At DDC-ITS and Summit Technologies, I administered Windows systems for the Defense Information Systems Agency. I applied DoD STIG hardening and managed monthly patching across production environments.

I'm currently providing Windows Server support, VMware management, and IT consulting to small businesses and individual clients as an independent consultant. My background also includes healthcare, federal, and enterprise infrastructure operations.

Experience

Work history, roles, and key accomplishments

Current

Independent Information Technology Consultant

Current

Freelance / Self-Employed

Sep 2025 - Present (1 year 1 month)

Providing IT infrastructure and systems administration services to small businesses and individual clients, including Windows Server support, VMware environment management, and general IT consulting.

Windows Server VMWare IT Consulting

Senior Technical Engineer III

Atos

Dec 2022 - Aug 2025 (2 years 8 months)

Managed Windows Server and VMware infrastructure across a 3,500+ server 24x7 healthcare enterprise environment, including Azure-based and cloud-connected systems. Served as SME for VMware vSphere and Windows Server, supporting infrastructure modernization and security compliance.

Windows Server VSphere Active Directory Group Policy DNS PowerShell Azure HIPAA Security Hardening

IT Systems Administrator

TenTek

Nov 2021 - Dec 2022 (1 year 1 month)

Provided IT systems administration for Marathon Petroleum's U.S. site infrastructure, supporting VMware environments, Windows servers, Active Directory, and Group Policy across multiple locations. Performed audit checks, root cause analysis, and proactive monitoring.

VMWare Windows Server Active Directory Group Policy Audit Root Cause Analysis Monitoring

Principal Systems Engineer II

Intelliware Systems

Nov 2018 - Aug 2021 (2 years 9 months)

Designed and deployed Virtual Desktop Infrastructure supporting 50,000+ endpoints across FBI field offices, using VMware vSphere, Citrix XenDesktop, and Group Policy. Used PowerShell for VDI provisioning and administration, and served as VMware SME across enterprise environments.

VSphere XenDesktop Group Policy PowerShell VDI SAN Active Directory

Windows Systems Administrator

Data2Logistics

Jul 2017 - Oct 2018 (1 year 3 months)

Deployed and maintained server, storage, and network infrastructure in a 24x7 environment supporting Windows Server, Exchange, SharePoint, Active Directory, and Citrix XenApp. Owned monthly Microsoft security patching and maintained Active Directory structure and GPO-based security policy.

Windows Server Exchange SharePoint Active Directory Citrix Virtual Apps And Desktops Patching GPO

Sr. Windows Systems Administrator

DDC-ITS

Oct 2013 - Jul 2017 (3 years 9 months)

Provided Windows systems administration in the Defense Information Systems Agency's enterprise processing center, supporting physical and virtual Windows servers with VMware/ESXi. Owned monthly Windows patching using PowerShell and hardened servers to DoD STIG requirements.

Windows Server VMware ESXi PowerShell Patching DOD STIG Active Directory Group Policy