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# Endpoint Systems Administrator

- **Company:** HII Mission Technologies
- **Location:** Springfield, VA, United States
- **Experience:** Experienced
- **Salary:** $61,116.0 - $125,000.0
- **Contract:** Permanent contract
- **Skills:** Microsoft Windows, System Configuration, Monitoring of Systems, System Center Configuration Manager, Windows PowerShell, Software Vulnerability Management, Scripting, Enterprise Software Applications, Sysadmin, Microsoft InTune, Deployment Automation, Patch Management, Software Version Control
- **Published:** October 28, 2026
- **Apply:** https://www.clearancejobs.com/jobs/9270493/endpoint-systems-administrator

## About the Role

We are searching for an Endpoint Systems Administrator candidate. The selected candidate will contribute to a high-impact government program focused on enhancing and securing mission-critical systems and environments. Due to the classified nature of the mission and the sensitivity of the operational environment, an active TS/SCI security clearance will be required. Candidate must be willing to obtain and maintain a CI poly., 5+ years of progressively responsible endpoint administration experience.

Demonstrated proficiency and expertise in the following:

 - Deploying, configuring, and managing Windows or ThinLinux end-client operating system solutions.
 - Installing, configuring, monitoring, and troubleshooting Microsoft and third-party enterprise applications across large endpoint environments.
 - Performing comprehensive operating system and application patching via MECM/SCCM, including researching updates, testing in controlled environments, deploying to production, troubleshooting failures, and executing rollback procedures when required.
 - Applying, validating, and maintaining security configurations based on Security Requirements Guides (SRGs) and Security Technical Implementation Guides (STIGs) for all supported endpoint platforms.
 - Managing endpoint configuration, compliance, and automation through enterprise tools such as MECM/SCCM, Intune, or similar technologies.
 - Diagnosing and resolving escalated endpoint issues requiring advanced technical knowledge of OS internals, application behavior, and configuration dependencies.
 - Performing post-deployment remediation and cleanup patching using PowerShell or similar scripting tools to automate updates, enforce configuration baselines, and resolve inconsistent patch states.

TS/SCI clearance required with ability to obtain CI Poly

Must meet DoD 8140/CSWF for 451-Intermedediate or be willing to obtain the appropriate credential within 6 months, System Admin 1 - 5 + years of experience w/ a HS diploma or equivalent
System Admin 2 - 5 + years of experience w/ a Bachelors in a related field, or 7+ years of experience w/ a HS diploma or equivalent
System Admin 3 - 6 + years of experience w/ a Bachelors in a related field, or 5+ years of experience w/ a Masters Degree in related field, or 7+ years of experience w/ a HS diploma or equivalent

Preferred Requirements

Formal training or vendor certifications related to operating system administration or MECM/SCCM.
Experience automating endpoint management tasks using PowerShell or similar scripting tools.
Familiarity with modern endpoint management solutions such as Intune or Autopilot.

## Description

* Develop, maintain, and optimize standard operating system images for all 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 major enterprise applications and core endpoint software suites.
 * Lead the patch management process for operating systems, security updates, and application patches; ensure timely, compliant, and well-communicated release cycles.
 * Evaluate and integrate new tools, technologies, and methods to improve endpoint stability, security, and performance.
 * Collaborate with cybersecurity teams to ensure compliance with security policies, vulnerability remediation, and hardening standards.
 * Create and maintain technical documentation, configuration baselines, and operational procedures.
 * Provide Tier 3 support for escalated endpoint issues requiring deep technical expertise.
 * Monitor system performance, reliability, and patch compliance using enterprise management tools.
 * Participate in strategic planning for endpoint technology architecture and long-term modernization efforts.