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Senior Linux Systems Engineer

Agile Defense· Digital Transformation – Engineering
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Oahu, HI$150k - $185kRegularPosted 2mo ago

About the role

Senior Linux Systems Engineer responsible for Linux engineering, systems administration, and cybersecurity services for Red Hat Enterprise Linux (RHEL) environments across Army and MI Domain networks, including on-premises and AC2SP hybrid-cloud environments.

Responsibilities

  • Deploy, configure, maintain, troubleshoot, and secure Linux-based servers
  • Develop, maintain, and enforce standardized RHEL system baselines with security requirements, STIGs, and operational standards
  • Deploy and manage RHEL systems lifecycle (installation, configuration, upgrades, patching, decommissioning)
  • Manage RHEL software packages and repositories using YUM/DNF
  • Configure and maintain enterprise Linux services (DNS, DHCP, NFS)
  • Manage user accounts, permissions, authentication, and access controls
  • Apply and test kernel updates, patches, and configuration changes in production and development
  • Monitor Linux systems for performance, security, availability, and capacity; proactive issue resolution
  • Implement and maintain system backup and disaster recovery procedures
  • Support integration and deployment of Linux systems for enterprise applications and infrastructure
  • Deploy and manage Linux infrastructure across distributed hybrid-cloud environments
  • Support enterprise RHEL environments across AWS, on-premises, and distributed infrastructure
  • Design and implement reliable, scalable, secure Linux solutions for global operations
  • Integrate Linux with enterprise networking, security, authentication, monitoring, and application services
  • Troubleshoot complex infrastructure issues across Linux, cloud, network, and application environments
  • Evaluate existing infrastructure and recommend improvements to reliability, scalability, security, and efficiency
  • Develop and maintain automation scripts (Bash, Python) to streamline administration and cybersecurity activities
  • Implement automated patching, configuration management, and vulnerability remediation
  • Utilize Ansible, Puppet, Chef for automation and configuration management
  • Identify opportunities to automate repetitive tasks; develop standardized deployment, configuration, hardening, patching, and maintenance processes
  • Maintain technical documentation for Linux systems, configurations, architectures, and procedures
  • Document vulnerability findings and remediation activities; support audits and RMF/IC compliance
  • Collaborate with Information Assurance, Cybersecurity, network, and application teams
  • Stay current with Linux, cloud, cybersecurity, and automation technologies and propose improvements

Qualifications

  • Bachelor’s Degree in a technology-related field or 15 years of related experience
  • Experienced Red Hat Linux Administrator
  • Top Secret, SCI clearance required to start (Clearance Level)
  • IAT Level III (CISSP/CASP) + Computing Environment (CE) certification
  • RHCSA (Red Hat Certified System Administrator)
  • One additional specialized certification in cloud technology or relevant to the scope of the PWS
  • If RHCSA or IAT Level III not present at start, must obtain within 6 months of starting the program

Skills

Required:Linux administrationRHEL baselines & STIGsPackage management (YUM/DNF)Networking services (DNS, DHCP, NFS)Security & compliance (RMF, STIGs)Automation (Bash, Python)
Nice to have:Vulnerability management (Tenable Nessus)Automation tools (Ansible, Puppet, Chef)

Benefits

  • Not explicitly itemized in the description
Last updated Oct 21, 2026. Interested? Apply on the company site.

About Agile Defense

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Agile Defense delivers advanced capabilities and solutions tailored to the most critical national security and civilian missions.

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