Systems Administrator Senior; VDI – TS/SCI
Listed on 2026-01-07
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IT/Tech
Cybersecurity, IT Support
Overview
Systems Administrator Senior (VDI) – TS/SCI required at General Dynamics Information Technology. The Senior VDI Administrator provides administration, monitoring, and updates to virtual infrastructure systems, supports critical system patching, responds to incidents, and schedules activities. This role is a subject matter expert on virtual infrastructures, including virtual networking, virtual systems, zero trust architectures, and virtual capabilities. The Senior VDI Administrator supports the US Army Intelligence and Security Command (INSCOM) mission.
Responsibilities- Serve as the Senior Administrator for virtual infrastructure environments, including VMware, Nutanix, and Hyper-V, supporting both virtual servers and desktops.
- Configure and maintain virtual delivery of desktop services utilizing Citrix Virtual Apps and Desktop (CVAD) and Omnissa Horizon, with a transition toward CVAD.
- Administer and support Microsoft technologies including FSLogix, Active Directory Services, DHCP, DNS, and Group Policy Objects (GPO).
- Provide Tier 2/3 support, diagnosing and resolving complex issues within the virtual infrastructure.
- Apply DISA Security Technical Implementation Guides (STIGs) to maintain a secure virtual environment.
- Develop functional requirements through end-user interaction and coordinate with support teams on enhancements or changes.
- Monitor, organize, and collaborate with Network Operations, Cyber Security, and other agencies to optimize and implement solutions.
- Mentor and train junior personnel in virtual infrastructure technologies.
- Manage incident tickets and provide timely status updates in accordance with SLAs.
- Perform system and application diagnoses to remediate issues, engaging other teams as needed.
- Education:
Bachelor’s Degree - Experience:
12+ years of related experience - Technical skills:
- Ability to provide in-depth troubleshooting of IT systems
- Ability to provide detailed analysis and feedback to agency management and internal customers for escalated tickets
- Experience administering and troubleshooting virtual infrastructure with strong virtualization concepts
- Proven expertise in at least one of the following platforms: VMware vSphere or Nutanix AHV
- Solid experience with VDI technologies, including CVAD and familiarity with Omnissa Horizon; transition between VDI platforms a plus
- Strong knowledge of Microsoft technologies (Active Directory, DHCP, DNS, GPO, FSLogix)
- Familiarity with security best practices and DISA STIG implementation
- Excellent communication, collaboration, and problem-solving skills
- Security clearance level: TS/SCI
- US citizenship required
- Required
Certifications: - DoD 8570.01-M IAT Level II/8140 Computing Environment (CE) Certification as determined by the Program Manager is required prior to support on contract
- IAT II 8570/8140 Baseline Certification Security+ or equivalent
- Computing Env: VCA
- Location:
On Customer Site - Role Requirements:
- On customer site daily support
- Willing to attain a CI Polygraph for certain positions as determined by the contract
- Physical requirements include lifting objects and other moderately strenuous activity
- Travel may be required to support the mission
At GDIT, the mission is our purpose, and our people are at the center of everything we do. We offer growth opportunities, internal mobility support, competitive benefits, a 401(k) with company match, paid time off, and a comprehensive total rewards package.
We are an Equal Opportunity Employer / Individuals with Disabilities / Protected Veterans. For more information about our career opportunities, join our Talent Community at
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