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Leidos

System Administrator

Leidos

. Provide daily systems administration and operations and maintenance support across multiple systems .

Posted 10/30/2026full-timeWarner Robins • United StatesSeniorLead💰 $116,350 - $210,325 per yearWebsite

Core Competencies

Role fit
Core Competencies

Use this summary to align your resume positioning with the role.

Demonstrates extensive experience in systems administration, particularly with Windows Server and Active Directory, while ensuring compliance with DoD cybersecurity standards. Capable of leading technical efforts, mentoring junior staff, and managing complex infrastructure tasks independently.

Highest-signal resume keywords
Windows Systems AdministrationActive Directory ManagementMicrosoft Hyper-V ClusteringDoD Cybersecurity CompliancePowerShell Scripting

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills
Windows Server 2022/2025Linux AdministrationVirtual Machine ManagementTCP/IP NetworkingVulnerability ScanningSTIG ComplianceBackup and Disaster RecoverySystem IntegrationTechnical DocumentationConfiguration Management
Soft Skills
Strong CommunicationOrganizational SkillsProblem-Solving SkillsMentoringCollaboration
Tools & Technologies
Hyper-VDNSDHCPGroup PolicyNPSPKIFirewallsLogging SolutionsMonitoring ToolsAutomation Tools
Certifications & Qualifications
Secret Security ClearanceTop Secret/SCI Clearance EligibilityDoD 8140 Certification Requirements
Industry Keywords
DoD RequirementsNIST SP 800-53RMFIAVA RemediationInfrastructure EfficiencyChange ControlSystem HardeningTechnical Design ReviewsData Center InstallationsSecure Remote Access

Tech Stack

Tools & technologies
Cyber SecurityDNSFirewallsLinuxTCP/IPTypeScript

About the role

Key responsibilities & impact
  • Provide daily systems administration and operations and maintenance support across multiple systems
  • Support operational requirements, engineering assistance, deployment, and sustainment of new capabilities
  • Monitor and administer systems, applications, and processes to identify, track, and resolve issues
  • Support servers and perform security management and application performance optimization
  • Design, implement, maintain, and support enterprise IT infrastructure as a senior technical SME
  • Install, administer, and troubleshoot Windows Server, Linux, Hyper-V clusters, virtual machines, and storage systems
  • Manage Active Directory, DNS, DHCP, Group Policy, NPS, and PKI
  • Oversee monitoring, logging, patch management, backups, disaster recovery, and endpoint security
  • Lead complex troubleshooting involving servers, virtualization, networking, authentication, and application performance
  • Manage vulnerability remediation, IAVAs, STIG compliance, security scanning, and patching under DoD requirements
  • Implement security controls, address findings, and support RMF and ATO activities with cybersecurity teams
  • Develop technical documentation, SOPs, system configurations, network diagrams, and recovery procedures
  • Lead system integration, testing, and deployment activities
  • Mentor junior personnel, review configurations, and provide technical guidance
  • Collaborate with engineering, cybersecurity, networking, and program teams
  • Identify improvements to performance, reliability, security, and infrastructure efficiency
  • Monitor system health, manage outages, identify risks, and communicate status to program leadership
  • Support technical design reviews, trade studies, testing, and configuration management
  • Ensure changes follow approved change control, documentation, testing, and security review processes
  • Independently manage complex technical tasks and lead infrastructure efforts with minimal supervision

Requirements

What you’ll need
  • Minimum Secret security clearance to start and eligibility for TS/SCI
  • Bachelor's degree in IT, Computer Science, Engineering, or a related field with 12+ years of relevant experience; additional experience may substitute for a degree
  • Minimum of 7 years of Windows systems administration experience, including 3 years in a senior or technical lead role
  • Minimum of 5 years of experience with Active Directory, DNS, Group Policy, and core Windows enterprise services
  • Active Top Secret/SCI security clearance or current Secret security clearance with ability to obtain TS/SCI within 365 days of hire
  • Strong experience with Microsoft Hyper-V, virtual machines, clustering, storage, and Windows Server 2022/2025
  • Working knowledge of TCP/IP, VLANs, routing, and firewalls
  • Experience with PowerShell scripting, automation, and Windows command-line tools
  • Experience supporting monitoring, logging, patch management, backup, and disaster recovery solutions
  • Hands-on experience with vulnerability scanning, IAVA remediation, STIG compliance, and system hardening
  • Working knowledge of DoD cybersecurity requirements, including NIST SP 800-53, RMF, and security configuration standards
  • Ability to troubleshoot complex infrastructure issues, support system integration, and maintain technical documentation and SOPs
  • Demonstrated ability to lead technical efforts, mentor junior administrators, work across engineering teams, and independently resolve technical challenges
  • Experience following configuration management, change control, and system maintenance processes
  • Strong communication, organizational, and problem-solving skills
  • Must meet applicable DoD 8140 certification and qualification requirements for the assigned work role
  • Preferred: DoD integration and testing environments; active TS/SCI clearance; Windows Server 2025, Hyper-V high-availability clustering, enterprise storage; data center installations; Cisco networking, firewalls, secure remote access; FAT/SAT and technical design reviews; infrastructure deployments and installation procedures

Benefits

Comp & perks
  • Paid Time Off
  • 11 paid Holidays
  • 401K with a 6% company match and immediate vesting
  • Flexible Schedules
  • Discounted Stock Purchase Plans
  • Technical Upskilling
  • Education and Training Support
  • Parental Paid Leave