Windows System Administrator

Leidos•Fort Meade, MD

3d•Hybrid

About The Position

Leidos is hiring a Windows Systems Administrator to support a Department of War customer at Fort Meade, Maryland. The role supports administration, maintenance, security, and reliability of mission-critical Windows Server infrastructure and enterprise services. Onsite support is required two to three days per week. The successful candidate will independently administer and maintain enterprise Windows Server environments, troubleshoot complex infrastructure issues, implement system changes, and ensure systems meet established security and operational requirements. The position calls for expertise in Microsoft Windows Server, Active Directory, virtualization, and system security; the ability to analyze complex problems and develop solutions; and collaboration across technical disciplines. The administrator will also contribute to infrastructure modernization, provide technical guidance to less-experienced administrators, and support continuous improvement of operational processes and system reliability. The candidate must be a U.S. citizen and able to obtain and maintain the required DoW Secret clearance. The role may involve maintenance windows, after-hours support, and on-call rotations as required.

Requirements

Bachelor's degree in Information Technology, Computer Science, Engineering, or a related technical discipline, and at least four years of relevant systems administration experience; additional relevant experience may be considered in lieu of a degree in accordance with applicable contract and Leidos requirements.
Hands-on experience administering, maintaining, and troubleshooting Microsoft Windows Server 2019, 2022, or newer supported versions in medium-to-large enterprise environments.
Strong working knowledge of Active Directory Domain Services, Group Policy, DNS, DHCP, NTFS and share permissions, service accounts, and Windows authentication.
Experience administering and supporting Windows Server virtual machines in enterprise virtualized or cloud-hosted environments.
Experience performing Windows Server patching, security configuration, vulnerability remediation, and operating system hardening.
Working knowledge of DISA STIG requirements, cybersecurity compliance processes, and security configuration baselines.
Ability to independently troubleshoot complex Windows Server issues involving operating system services, authentication, storage, networking, performance, and application dependencies.
Practical experience using PowerShell for systems administration, troubleshooting, and scripting or automation of recurring tasks.
Experience performing server builds, configuration changes, upgrades, migrations, and operational maintenance in production environments.
Understanding of ITIL-aligned incident, problem, service request, and change-management processes.
Ability to independently manage technical tasks, analyze complex problems, develop effective solutions, and coordinate with other infrastructure teams.
Strong written and verbal communication skills, including the ability to document technical activities and collaborate with customers, cybersecurity personnel, and cross-functional technical teams.
Ability to meet applicable DoD 8140 cybersecurity workforce qualification requirements within the timeframe established by the customer and contract.
Must be a U.S. citizen and able to obtain and maintain the required DoW Secret clearance.

Nice To Haves

Active DoD Secret clearance.
Security+ CE or another DoD 8140-accepted certification.
A relevant Microsoft certification in Windows Server, Azure, or hybrid infrastructure.
Advanced Active Directory experience, including domain controllers, replication, trusts, Group Policy troubleshooting, and privileged access management.
Production experience with Windows Server 2025, including virtual machines in Azure and Nutanix.
Nutanix Certified Associate certification.
Experience with Failover Clustering, IIS, WSUS, MECM/SCCM, or comparable patching and management platforms.
Experience with enterprise backup, recovery, and disaster recovery testing.
Experience with SCAP scanning tools and DISA STIG Viewer.
Experience with PowerShell or Ansible automation.
Experience supporting DoW or federal environments with formal compliance and change-management requirements.
Experience mentoring junior administrators and developing technical documentation and operational procedures.

Responsibilities

Independently administer, patch, secure, and troubleshoot Windows Server 2019, 2022, 2025, and other supported versions in enterprise production environments.
Manage Active Directory Domain Services, Group Policy, DNS, DHCP, and related authentication and authorization services.
Support Windows Server virtual machines in Microsoft Azure and Nutanix, including provisioning, configuration, and troubleshooting with cloud and virtualization teams.
Monitor server health, performance, capacity, and logs; proactively resolve issues; and perform root-cause analysis on recurring or significant incidents.
Apply security updates, remediate vulnerabilities, implement DISA STIGs, and partner with cybersecurity teams on POA&Ms, compliance assessments, and incident response.
Plan and execute server builds, upgrades, migrations, and decommissioning under established change-management processes.
Manage assigned incidents, requests, and changes through resolution.
Develop PowerShell scripts to automate administration, inventory, reporting, and configuration tasks.
Maintain server inventories, standard operating procedures, and recovery documentation.
Support backup and recovery activities.
Collaborate with network, storage, cloud, and application teams to solve complex issues and drive modernization.
Mentor and peer-review the work of junior administrators.
Participate in maintenance windows, after-hours support, and on-call rotations as required.