Endpoint Systems Administrator

Mission Technologies, a division of HII; Springfield (VA); On-site; USD 61,116 - 125,000; Full time

Job summary

Mission Technologies, a division of HII, is seeking an experienced Endpoint Administrator to support enterprise endpoints. The role focuses on Windows/ThinLinux OS management, patching, and security hardening in a government program.

You will own OS images, patch cycles, and deployment strategies, collaborating with cybersecurity teams to meet SRG/STIG requirements and maintain system integrity.

Qualifications

• 5+ years of endpoint administration experience.
• Experience deploying and supporting Windows and ThinLinux endpoints.
• Experience patching via MECM/SCCM with testing, deployment and rollback.
• Applying SRGs/STIGs security baselines across endpoint platforms.
• Knowledge of endpoint automation and configuration management.
• Willingness to obtain TS/SCI clearance and CI Poly within 6 months.

Responsibilities

• Develop, maintain, and optimize OS images for enterprise endpoints.
• Own the full lifecycle of desktop OS platforms from design to deployment.
• Manage deployment and version control for enterprise applications.
• Lead patch management to ensure timely and compliant releases.
• Evaluate new tools and methods to improve endpoint stability and security.
• Collaborate with cybersecurity teams to enforce security policies and hardening.
• Create and maintain technical documentation and procedures.
• Provide Tier 3 support for escalated endpoint issues.
• Monitor system performance and patch compliance with management tools.
• Participate in architectural planning for endpoint modernization.

Skills

Endpoint administration

Windows OS management

Software patching

Security policy compliance

Scripting with PowerShell

MECM/SCCM administration

CI poly readiness

DoD cyber standards knowledge

Tools

MECM/SCCM

Intune

PowerShell

Job description

Job Overview

Requisition Number: 29236

Required Travel: 0 - 10%

Employment Type: Full Time/Salaried/Exempt

Anticipated Salary Range: $61,116.00 - $125,000.00

Security Clearance: TS/SCI

Level of Experience: Mid

Job Description

HII’s 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.

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.

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 long‑term modernization efforts.

Minimum Qualifications

5+ years of progressively responsible endpoint administration experience.

Required Skills

• Deploy, configure, and manage Windows or ThinLinux end‑client operating system solutions.
• Install, configure, monitor, and troubleshoot Microsoft and third‑party enterprise applications across large endpoint environments.
• Perform 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.
• Apply, validate, and maintain security configurations based on Security Requirements Guides (SRGs) and Security Technical Implementation Guides (STIGs) for all supported endpoint platforms.
• Manage endpoint configuration, compliance, and automation through enterprise tools such as MECM/SCCM, Intune, or similar technologies.
• Diagnose and resolve escalated endpoint issues requiring advanced technical knowledge of OS internals, application behavior, and configuration dependencies.
• Perform post‑deployment remediation and cleanup patching using PowerShell or similar scripting tools to automate updates, enforce configuration baselines, and resolve inconsistent patch states.
• Possess TS/SCI clearance and be willing to obtain CI Poly; meet DoD 8140/CSWF for 451-Intermediate 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.

Equal Employment Opportunity

All qualified applicants will receive consideration for employment without regard to race, color, religion, gender, gender identity or expression, sexual orientation, national origin, physical or mental disability, age, or veteran status or any other basis protected by federal, state, and local law.