Linux Administrator

Mission Technologies, a division of HII

. Administer and maintain Linux-based mission systems and multi-user environments .

Posted 10/19/2026full-timeDes Moines • Iowa • United StatesMid-LevelSenior💰 $70,889 - $88,000 per yearWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in Linux System Administration, including configuration, hardening, and maintenance of Linux-based mission systems in compliance with DoD cybersecurity standards. Proficient in implementing cybersecurity controls, performing troubleshooting, and utilizing monitoring tools within a security-focused environment.

Highest-signal resume keywords

Linux System AdministrationSTIG ComplianceCybersecurity Monitoring ToolsBash ScriptingIAT Level II Certification

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Linux AdministrationSystem HardeningBackup and RecoveryNetwork TroubleshootingVirtualization TechnologiesPatch ManagementPerformance MonitoringConfiguration ManagementStorage ManagementScripting

Tools & Technologies

HBSSSIEM SolutionsVMwareWiresharkDTOC TechnologiesOTTI Technologies

Certifications & Qualifications

IAT Level II CertificationCompTIA Linux+RHCSALPIC-1

Industry Keywords

DoDCybersecurityMission SystemsMulti-User EnvironmentsLAN Environments

Tech Stack

Tools & technologies

Cyber SecurityLinuxTypeScriptVMware

About the role

Key responsibilities & impact

Administer and maintain Linux-based mission systems and multi-user environments
Coordinate with network administrators as needed
Support installation, configuration, and routine operation of Linux servers, workstations, and peripherals
Execute backup, recovery, and basic storage management tasks
Configure and harden Linux systems in accordance with STIGs, JSIG, and DoD cybersecurity requirements
Respond to system outages, performance issues, and troubleshooting requests
Integrate and support DTOC and OTTI technologies
Provide support for Linux-based applications and modeling & simulation tools
Support cybersecurity monitoring tools such as HBSS and SIEM solutions
Implement OS-level patches, security updates, and software releases for Linux systems and Windows when required
Document system configurations, procedures, and long-term operational needs

Requirements

What you’ll need

2 years of relevant experience with a Bachelor’s degree; OR 0 years of experience with a Master’s degree; OR 6 years of relevant experience with a High School Diploma/equivalent
Experience with Linux system administration in a DoD or security-focused environment
Ability to apply STIGs and implement cybersecurity controls across Linux systems
Familiarity with basic virtualization technologies (e.g., VMware), virtual machines, and LAN environments
Ability to update and patch Linux and Windows systems, including offline environments
Ability to perform basic network analysis and troubleshooting using tools such as Wireshark
Working knowledge of Bash or PowerShell scripting for automation and system tasks
Active DoD Secret Clearance with ability to upgrade to TS
U.S. Citizenship
IAT Level II certification (e.g., Security+)
Ability to obtain a CompTIA Linux+, RHCSA or LPIC-1 certification before start
May require working in an office, industrial, shipboard, or laboratory environment
Capable of climbing ladders and tolerating confined spaces and extreme temperature variances

Benefits

Comp & perks

Best-in-class medical, dental and vision plan choices
Wellness resources
Employee assistance programs
Savings Plan Options (401(k))
Financial planning tools
Life insurance
Employee discounts
Paid holidays and paid time off
Tuition reimbursement
Early childhood and post-secondary education scholarships
Bonus/other non-recurrent compensation occasionally offered for qualified positions