System Administrator

Leidos is seeking a System Administrator to support mission-critical IT environments for government and commercial clients. In this role, you will administer and secure Windows and Linux servers, manage Active Directory, and support virtualization, storage, and networked systems. You'll implement patching, backup, and disaster recovery, monitor performance, and resolve incidents to maintain high availability. Working in a collaborative, mission-driven culture, you'll contribute to secure, reliable solutions while benefiting from professional growth, flexible work options, and robust benefits.

Responsibilities

• Administer, monitor, and optimize Windows and Linux servers in enterprise environments.
• Manage Active Directory, Group Policy, user provisioning, and access controls.
• Implement and maintain system security, patching, and compliance standards.
• Configure and troubleshoot networks, virtualization platforms, and storage systems.
• Manage backup, recovery, and disaster recovery procedures.
• Monitor system performance and resolve incidents to ensure high availability.
• Automate routine tasks using scripts and standard tools.
• Document configurations, procedures, and changes following Leidos standards.
• Collaborate with security, network, and engineering teams on projects and upgrades.
• Support on-call rotation for critical systems as needed.

Required Skills

• Windows and Linux server administration
• Active Directory and Group Policy management
• Virtualization (VMware/Hyper-V)
• Network configuration and troubleshooting
• System monitoring and performance tuning
• Backup and disaster recovery management
• Shell/Power
• Shell scripting
• Security hardening and patch management
• Cloud platforms (AWS/Azure)
• Configuration management and documentation