Endpoint Systems Administrator

HII•Springfield, MO

About The Position

HII’s Mission Technologies division is seeking an Endpoint Systems Administrator for a high-impact government program focused on enhancing and securing mission-critical systems and environments. The role is part of the Cyber and Intelligence division and supports enterprise-level security and modernization across IT infrastructure, cybersecurity, physical facilities, and personnel operations. An active TS/SCI clearance is required, and the candidate must be willing to obtain and maintain a CI polygraph. The administrator owns the lifecycle of enterprise endpoint operating system platforms, from design and configuration through testing, release, documentation, and continuous improvement. The role also manages enterprise application deployment and patching, supports security compliance and endpoint modernization, monitors endpoint performance and compliance, and provides Tier 3 support for complex issues. The position is offered at System Administrator levels I, II, or III, with level-specific experience and education qualifications.

Requirements

At least 5 years of progressively responsible endpoint administration experience; level-specific qualifications may require additional experience.
Experience 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 comprehensive operating system and application patching through MECM/SCCM, including update research, controlled testing, production deployment, failure troubleshooting, and rollback procedures.
Experience applying, validating, and maintaining endpoint security configurations based on Security Requirements Guides (SRGs) and Security Technical Implementation Guides (STIGs).
Experience managing endpoint configuration, compliance, and automation with MECM/SCCM, Intune, or similar enterprise tools.
Ability to diagnose and resolve escalated endpoint issues involving OS internals, application behavior, and configuration dependencies.
Experience performing post-deployment remediation and cleanup patching using PowerShell or similar scripting tools.
Active TS/SCI security clearance and ability to obtain a CI polygraph.
Must meet DoD 8140/CSWF requirements for 451-Intermediate or be willing to obtain the appropriate credential within six months.
System Administrator I: 5 or more years of experience and a high school diploma or equivalent.
System Administrator II: 5 or more years of experience with a bachelor’s degree in a related field, or 7 or more years of experience with a high school diploma or equivalent.
System Administrator III: 6 or more years of experience with a bachelor’s degree in a related field, 5 or more years with a master’s degree in a related field, or 7 or more years with a high school diploma or equivalent.

Nice To Haves

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.

Responsibilities

Develop, maintain, and optimize standard operating system images for enterprise endpoint devices.
Own the full lifecycle of desktop operating system 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 operating system, security, and application patch management, including timely and compliant release cycles.
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 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.
Research, test, deploy, troubleshoot, and roll back operating system and application patches as required.
Apply, validate, and maintain endpoint security configurations based on SRGs and STIGs.
Perform post-deployment remediation and cleanup patching using PowerShell or similar scripting tools.

Benefits

Medical, dental, and vision plan choices
Wellness resources
Employee assistance programs
401(k) savings plan options
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 career growth
Occasional bonus or other non-recurrent compensation for qualified positions, if applicable