Junior-Senior Systems Administrator

Mission Technologies, a division of HII

Systems Administrator maintaining Windows, network, and classified infrastructure at HII Mission Technologies. Supporting U.S.

Posted 8/10/2026full-timeDayton • Ohio • 🇺🇸 United StatesSenior💰 $75,920 - $140,000 per yearWebsite

Core Competencies

Role fit

Core Competencies

Use this summary to align your resume positioning with the role.

Demonstrates expertise in system maintenance, including security patches and OS updates, while providing administrator support and managing data transfers. Proficient in Active Directory, Windows OS, and maintaining documentation in classified environments.

Highest-signal resume keywords

CompTIA Security+ CE CertificationActive Directory ManagementWindows OS AdministrationVPN ConfigurationSQL Database Knowledge

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

System MaintenanceTroubleshooting Hardware FailuresUser Creation/DeletionSecurity Group ManagementStorage Media PermissionsNetwork Data TransfersLinux OSDocumentation ManagementInventory Database ManagementBasic OSI Networking Model Understanding

Tools & Technologies

Windows Server OSVPN ConnectionsNIPR NetworksSIPR Networks

Certifications & Qualifications

CompTIA Security+ CE CertificationAdditional IT/Technical Certifications

Industry Keywords

Classified EnvironmentsDoD NetworksSystem Administrator

Tech Stack

Tools & technologies

LinuxSQLTypeScript

About the role

Key responsibilities & impact

Maintain development systems, including security patches, kernel updates, and OS updates
Identify, troubleshoot, and diagnose hardware failures and restore system capability
Provide administrator support, including user creation/deletion, security group management, storage media permissions, and shared resource configuration
Manage data transfers between networks as needed
Purchase and configure PCs for new personnel
Purchase and maintain printer toner inventory and replace cartridges
Maintain system documentation and inventory database
Perform other infrastructure maintenance tasks as required

Requirements

What you’ll need

Bachelor's degree in a related field and 0–10+ years of relevant experience, or master's degree in a related field and 0–8+ years of relevant experience, or high school diploma/equivalent and 4–14+ years of relevant experience
Current CompTIA Security+ CE certification preferred at hire or ability to obtain within 6 months of hire
Knowledge of Active Directory, Windows OS, and Windows Server OS
Basic understanding of the OSI networking model
Ability to bend, reach, stoop, and lift up to 50 lbs
Ability to climb rung ladders and work in confined areas
Active TS/SCI security clearance and ability to pass enhanced security checks
Preferred: experience configuring and managing VPN connections to remote sites
Preferred: additional IT/technical certifications
Preferred: experience working in classified environments
Preferred: experience with NIPR, SIPR, and other DoD networks
Preferred: experience with databases, including working knowledge of SQL and relational data stores
Preferred: experience with Linux OS
Adequate visual acuity and manual dexterity for the Systems Analyst discipline

Benefits

Comp & perks

Salary range of $75,920.00–$140,000.00 for the posted role
Required travel limited to 0–10%
Reasonable accommodations for the employment process
Equal employment opportunity protections