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From the employer's careers site First seen 31 Oct 2026 · Still live on 4 Nov 2026

Windows Systems Administrator

Leidos Arlington, VA On-site mid full-time

Salary

$59,150 - $106,925 per year

Apply on Leidos

Description

We are currently seeking a Windows Systems Administrator to join the Compartmented Enterprise Services Office (CESO) effort. This program is establishing a modern secure web service (SWS) operation as part of a state-of-the-art, highly automated platform capable of supporting a rapidly expanding customer population.

The position is based in Arlington, VA and is 100% on-site.

Primary Responsibilities

  • Administer and maintain Windows Server environments across physical and virtual infrastructure.
  • Manage Active Directory, DNS, DHCP, Group Policy, and Microsoft-based infrastructure services.
  • Perform server installation, configuration, upgrades, patching, and troubleshooting.
  • Monitor server performance, availability, capacity, and system health.
  • Manage user accounts, permissions, security groups, and access controls.
  • Support virtualization platforms such as VMware.
  • Implement and maintain server backup and disaster-recovery procedures.
  • Troubleshoot operating-system, application, network, and server-related issues.
  • Apply security updates, hardening standards, and vulnerability remediation.
  • Maintain technical documentation, configuration records, and operational procedures.
  • Participate in incident response, change management, and infrastructure projects.
  • Automate routine administrative tasks using PowerShell where appropriate.
  • Provide escalation-level support for Windows infrastructure issues.

Basic Qualifications

  • Bachelor's degree and 2+ years of overall related experience with a Windows servers environment.
  • An active TS/SCI security clearance is required for this position.
  • Currently possess DoD 8750 certification at least IAT level II, e.g., Security+.
  • Comfortable working 24×7 shifts, including nights, weekends, and holidays.
  • Experience with configuration, troubleshooting, and maintaining VMware environments.
  • Experience with PowerShell scripting and experience in other languages like Python.
  • Experience with application of security settings and other commercial best practices such as DISA STIGS.
  • Proficient with Active Directory, DNS, DHCP, Group Policy, and Microsoft-based infrastructure services.
  • Experience with System (hardware) and application (software) installation and configuration.
  • Strong troubleshooting and problem-solving skills.

Preferred Qualifications

  • Prior experience with DISA and DISA's support to mission partners.
  • TS/SCI w/CI Poly Preferred.
  • Experience with AWS EC2, S3.
  • Candidates with a thorough knowledge of networking principles to include TCP/IP a plus.
  • Experience with a ticketing system such as BMC Remedy.
  • Linux OS experience.

Pay Range

$59,150.00 - $106,925.00

Skills

Required

  • Windows Server
  • Active Directory
  • DNS
  • DHCP
  • Group Policy
  • Microsoft-based infrastructure services
  • PowerShell
  • VMware
  • Security+
  • DoD 8750 certification

Nice to have

  • DISA
  • AWS EC2
  • S3
  • TCP/IP
  • BMC Remedy
  • Linux OS
  • CI Poly

Ready to apply?

You apply with the employer directly. Their original posting is here: https://leidos.wd5.myworkdayjobs.com/en-US/External/job/Arlington-VA/Windows-Server-Administrator---Day-Shift_R-00195317

Apply on Leidos