Endpoint Systems Administrator

Job Description

HIIs Mission Technologies division is dedicated to delivering cutting-edge solutions that advance national security and defense objectives. This position is part of our Cyber and Intelligence division which plays a critical role in supporting Enterprise-Level Security and Modernization efforts across IT infrastructure cybersecurity physical facilities and personnel operations.

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.

Endpoint Systems Administrator I: $65000 - $85000

Endpoint Systems Administrator II: $80000 - $105000

Endpoint Systems Administrator III: $100000 - $125000

Essential Job Responsibilities

• 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 longterm modernization efforts.

Minimum Qualifications

5 years of progressively responsible endpoint administration experience.

Demonstrated proficiency and expertise in the following:
- Deploying configuring and managing Windows or ThinLinux endclient operating system solutions.
- Installing configuring monitoring and troubleshooting Microsoft and thirdparty 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 postdeployment 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

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.