Staff Windows System Administrator - TS/SCI W/Poly - Littleton, CO
25037.5010
Apply to this job ENTERPRISE BUSINESS SERVICES Until 9/3/2026 First posted July 5, 2026 Last posted July 5, 2026
Job description
• Must have an active TS/SCI clearance with a CI Poly
• U.S. Citizenship required for access to the work facility
• IAT II certification (Security+, etc.)
• SME level experience with the following: Active Directory (Domain Services, Certificate Services, Federative Services, Trusts, PKI)
• Experience with Windows Server (Server 2022, 2025) including backups, hardening, monitoring, tuning, and patching
• Extensive knowledge of HPE / Dell server hardware maintenance, deployment, patching, automation (HP Oneview, Ilo, IDRAC, etc.)
• Experience using VMWare or Hyper-V tools for virtualization
• Experience with vulnerability remediation and security management (i.e., system hardening, log management, configuration management (i.e., Nessus Trellix, WSUS, MECM, Ivanti, Splunk)
• U.S. Citizenship required for access to the work facility
• IAT II certification (Security+, etc.)
• SME level experience with the following: Active Directory (Domain Services, Certificate Services, Federative Services, Trusts, PKI)
• Experience with Windows Server (Server 2022, 2025) including backups, hardening, monitoring, tuning, and patching
• Extensive knowledge of HPE / Dell server hardware maintenance, deployment, patching, automation (HP Oneview, Ilo, IDRAC, etc.)
• Experience using VMWare or Hyper-V tools for virtualization
• Experience with vulnerability remediation and security management (i.e., system hardening, log management, configuration management (i.e., Nessus Trellix, WSUS, MECM, Ivanti, Splunk)
About this role
Summary
Manage Windows systems, security, virtualization, and hardware in a secure environment.
Job title
Staff Windows System Administrator - TS/SCI W/Poly - Littleton, CO
Experience level
SME level
Industry
enterprise business services
Location requirements
Littleton, CO; on-site work only
Salary
Not specified
Management role
No
Skills & keywords
Required skills
Active DirectoryWindows ServerVMwareHyper-Vsecuritysystem hardening
Preferred skills
None specified
Specializations
Active DirectoryWindows Servervirtualizationsecurity managementsystem hardening
Locations
Structured locations inferred from the posting.
Littleton, CO, USA
On-site City