TS/SCI Endpoint Systems Administrator — Secure IT Ops

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

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.