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Systems Administrator - Windows (Mid-Level)

Washington, DC On-site Full-time

Posted 09/24/2026

As a Mid-Level Windows Systems Administrator, you will manage and troubleshoot production Windows environments across Active Directory, DNS, DHCP, Group Policy, Microsoft Exchange, and VMware. You will take ownership of patching, vulnerability remediation, PowerShell automation, and STIG compliance while supporting infrastructure projects, audits, and complex operational issues.

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What you will do

  • Install, configure, maintain, and troubleshoot Windows Server environments.
  • Administer Active Directory, DNS, DHCP, Group Policy, and login scripts across production domains.
  • Maintain Microsoft Exchange and Microsoft 365 services.
  • Manage VMware infrastructure, virtual desktops, and enterprise endpoints.
  • Perform patch management, vulnerability remediation, access management, and security hardening.
  • Develop PowerShell scripts to automate administration, monitoring, and reporting.
  • Maintain STIG compliance and support NIST 800-53 audits and evidence collection.
  • Troubleshoot complex infrastructure issues and participate in on-call support.

What we are looking for

  • 3 to 5 years of hands-on Windows system administration experience.
  • Strong Active Directory, Group Policy, DNS, and DHCP administration skills.
  • Practical PowerShell scripting experience.
  • Experience with patching, vulnerability management, and Windows Server security.
  • Working knowledge of VMware and enterprise infrastructure environments.
  • Bachelor's degree or equivalent professional experience.
  • For cleared roles, active clearance and citizenship requirements may apply.

Nice to have

  • MECM/SCCM, WSUS, Certificate Authority, and PXE/imaging experience.
  • Microsoft Exchange and Microsoft 365 administration.
  • Azure or hybrid Windows infrastructure experience.
  • Microsoft certifications or Security+ CE.

Skills and expertise

Active Directory DNS DHCP Group Policy Microsoft Exchange MECM/SCCM WSUS Certificate Services PowerShell VMware IIS BitLocker Azure Windows Server STIG Tenable

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