Horizon VDI Administrator

Zachary Piper Solutions is seeking a Horizon VDI Administrator to support secure, high-performance virtual desktop infrastructure (VDI) environments across multiple classified and unclassified Department of Defense (DoD) networks. This individual will play a key role in maintaining mission readiness by ensuring reliable, compliant, and optimized VMware Horizon deployments. The ideal candidate will bring hands-on expertise in VDI engineering, security hardening (DISA STIGs), and automation to keep virtual desktop environments secure, efficient, and audit-ready.

This position is on-site in Alexandria, VA, an requires an active TS/SCI clearance.

Responsibilities of the Horizon VDI Administrator:

• Engineer, configure, and maintain VMware Horizon VDI environments supporting both classified and unclassified networks.
• Apply DISA STIGs and support RMF/ATO compliance activities to meet DoD cybersecurity requirements.
• Manage and update gold images, application layers (App Volumes), and Dynamic Environment Manager (DEM) configurations.
• Troubleshoot user access issues, performance degradation, and system incidents, ensuring continuous availability and reliability.
• Collaborate with system engineers, cybersecurity analysts, and network teams to align on configuration standards and deployment timelines.
• Automate routine administrative tasks and compliance checks using PowerShell / PowerCLI scripting.
• Maintain documentation for configurations, patching cycles, and audit reports within eMASS and other DoD compliance tools.
• Support security remediation efforts by leveraging tools such as ACAS, HBSS, and SCAP Compliance Checker.
• Participate in off-hours maintenance windows for patching, upgrades, and system optimizations as needed.

Qualifications for the Horizon VDI Administrator:

• Bachelor’s degree in Computer Science, Information Technology, Engineering, or a related discipline.
• 5+ years of experience in systems engineering, virtualization, or VDI administration.
• Proven expertise with VMware Horizon (Instant Clones, App Volumes, DEM) and vSphere / ESXi.
• Proficiency in Windows Server, Active Directory, and PowerShell scripting.
• Experience applying DISA STIGs, supporting RMF/eMASS processes, and managing compliance documentation.
• Familiarity with ACAS, HBSS, and SIEM tools for system monitoring and vulnerability management.
• Understanding of TLS/FIPS configuration and secure network protocols.
• Ability to work on-site in a classified environment (up to IL6); U.S. Citizenship required.
• Preferred: Experience with VMware NSX-T or F5/NSX Advanced Load Balancer, vGPU integration (NVIDIA A16/A40 or AMD), Zero Trust Architecture, or Horizon Cloud on Azure/AWS GovCloud.
• Familiarity with automation and DevOps tools such as Packer, Ansible, and Terraform is a plus.

Compensation and Benefits:

• $135,000 – $155,000 (Dependent on experience)
• Comprehensive Benefits: Medical, Dental, Vision, 401(k), PTO, Sick Leave (as required by law), and Holidays

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