Senior Systems Administrator/Helpdesk Engineer

Leidos

Senior Systems Administrator/Helpdesk Engineer at Leidos, ensuring stability and performance for critical environments. Collaborating with Agile teams to deliver national security capabilities.

Posted 7/29/2026full-timeGaithersburg • Arizona, Colorado, Maryland, Montana, Virginia • 🇺🇸 United StatesSenior💰 $92,300 - $166,850 per yearWebsite

Core Competencies

Role fit

Core Competencies

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

Demonstrates expertise in system administration for Linux and Windows environments, with a strong focus on compliance with DoD STIGs and effective management of virtualization infrastructure. Proficient in automation and scripting, ensuring system performance and security in mission-critical settings.

Highest-signal resume keywords

Linux System AdministrationWindows Server AdministrationVirtualization (VMware, KVM)Automation and Scripting (Ansible, PowerShell, Bash)DoD 8570 IAT Level II or III Certification

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

System HardeningOS Installation and ConfigurationRoot Cause AnalysisBackup and Recovery StrategiesCloud Platforms (AWS GovCloud, Azure Government)Enterprise NetworkingIdentity/Access ManagementStorage ConceptsIncident ResponseSecurity Audits

Soft Skills

Customer ServiceProblem SolvingProject LeadershipCollaboration

Tools & Technologies

AnsiblePowerShellBashVMwareKVM

Certifications & Qualifications

Security+ CECASP+CISSP

Industry Keywords

DoD ComplianceSTIG ComplianceRMF ProcessesIC EnvironmentsMission-Critical Systems

Tech Stack

Tools & technologies

AnsibleAWSAzureCloudCyber SecurityLinuxPythonVMware

About the role

Key responsibilities & impact

Lead system administration for Linux and Windows-based systems in secure, mission-critical environments
Diagnose and resolve hardware, software, and end-user technical issues while serving as a primary IT support contact, managing support tickets through resolution, and delivering responsive customer service
Architect and manage complex server, storage, and virtualization infrastructure (VMware, KVM)
Perform OS installation, configuration, hardening, and patching in compliance with DoD STIGs and agency policies
Monitor and tune system performance, conduct root cause analysis, and resolve complex issues quickly and efficiently
Support backup/recovery strategies, disaster recovery plans, and continuity of operations
Oversee and maintain automation scripts and infrastructure as code (Ansible, PowerShell, Bash, etc.)
Maintain system documentation, configuration baselines, and support CM and RM activities
Lead and support deployment of system enhancements and modernization initiatives for Chinook program
Collaborate with cybersecurity, network engineering, and software development teams to ensure system compliance and performance
Participate in security audits, incident response, and operational readiness activities.

Requirements

What you’ll need

US citizenship is required per contract
Bachelor’s degree in Computer Science, Engineering, Information Technology, or related discipline and 8-12 years of prior relevant experience or Master’s with 6-10 years of prior relevant experience
DoD 8570 IAT Level II or III certification (e.g., Security+ CE, CASP+, CISSP)
Experience with cloud platforms (AWS GovCloud, Azure Government) and hybrid cloud environments
Experience with Linux (Red Hat Enterprise Linux or CentOS) and Windows Server platform system administration
Proficiency with virtualization platforms (VMware, KVM) and management tools
Experience with automation and scripting (Ansible, Bash, PowerShell, Python)
Familiarity with STIG compliance, system hardening, ACAS scans, and RMF processes
Strong understanding of enterprise networking, identity/access management, and storage concepts
Proven ability to troubleshoot, document, and lead systems-related projects independently
Experience supporting IC or DoD classified environments.

Benefits

Comp & perks

Health and Wellness programs
Income Protection
Paid Leave
Retirement