Endpoint Systems Administrator

Mission Technologies, a division of HII

. Develop, maintain, and optimize standard operating system images for enterprise endpoint devices .

Posted 10/27/2026full-timeSpringfield • Virginia • United StatesMid-LevelSenior💰 $61,116 - $125,000 per yearWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in endpoint administration, including the deployment, configuration, and management of Windows and ThinLinux operating systems. Proficient in patch management, security compliance, and utilizing enterprise management tools for system performance monitoring.

Highest-signal resume keywords

Endpoint Administration ExperienceWindows Operating System ManagementMECM/SCCM ProficiencyActive TS/SCI Security ClearanceSecurity Configuration Management

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Endpoint ConfigurationOperating System PatchingPowerShell ScriptingApplication TroubleshootingSystem Performance MonitoringConfiguration BaselinesTechnical DocumentationSecurity Policy ComplianceVulnerability RemediationAutomation Management

Tools & Technologies

MECMSCCMIntuneThinLinuxMicrosoft Enterprise ApplicationsEnterprise Management ToolsAutopilot

Certifications & Qualifications

Active TS/SCI Security ClearanceDoD 8140/CSWF ComplianceOperating System Administration Certifications

Industry Keywords

Endpoint DevicesPatch ManagementCybersecuritySystem AdministrationMission-Critical Systems

Tech Stack

Tools & technologies

Cyber SecurityTypeScript

About the role

Key responsibilities & impact

Develop, maintain, and optimize standard operating system images for enterprise endpoint devices
Own the full lifecycle of desktop OS platforms, including design, configuration, testing, release, documentation, and continuous improvement
Manage deployment, maintenance, and version control for enterprise applications and core endpoint software suites
Lead patch management for operating systems, security updates, and application patches
Evaluate and integrate tools, technologies, and methods to improve endpoint stability, security, and performance
Collaborate with cybersecurity teams on security policy compliance, vulnerability remediation, and hardening standards
Create and maintain technical documentation, configuration baselines, and operational procedures
Provide Tier 3 support for escalated endpoint issues
Monitor system performance, reliability, and patch compliance using enterprise management tools
Participate in strategic planning for endpoint technology architecture and modernization efforts
Support a government program focused on securing mission-critical systems and environments

Requirements

What you’ll need

5+ years of progressively responsible endpoint administration experience
Proficiency deploying, configuring, and managing Windows or ThinLinux end-client operating system solutions
Experience installing, configuring, monitoring, and troubleshooting Microsoft and third-party enterprise applications across large endpoint environments
Experience performing operating system and application patching via MECM/SCCM
Experience applying and maintaining security configurations based on SRGs and STIGs
Experience managing endpoint configuration, compliance, and automation through MECM/SCCM, Intune, or similar tools
Advanced knowledge of OS internals, application behavior, and configuration dependencies
Experience using PowerShell or similar scripting tools
Active TS/SCI security clearance required
Ability to obtain and maintain a CI poly
Must meet DoD 8140/CSWF for 451-Intermediate or obtain the appropriate credential within 6 months
System Admin I: 5+ years of experience with a high school diploma or equivalent
System Admin II: 5+ years with a bachelor's degree in a related field, or 7+ years with a high school diploma or equivalent
System Admin III: 6+ years with a bachelor's degree, or 5+ years with a master's degree, or 7+ years with a high school diploma or equivalent
Formal training or vendor certifications related to operating system administration or MECM/SCCM preferred
Familiarity with Intune or Autopilot preferred

Benefits

Comp & perks

Best-in-class medical, dental and vision plan choices
Wellness resources
Employee assistance programs
Savings Plan Options (401(k))
Financial planning tools
Life insurance
Employee discounts
Paid holidays and paid time off
Tuition reimbursement
Early childhood and post-secondary education scholarships
Competitive benefits
Educational and training programs for continual career growth
Bonus/other non-recurrent compensation may occasionally be offered for qualified positions