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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Linux Systems Administrator - **Company:** The Johns Hopkins University Applied Physics Laboratory LLC - **Location:** North Laurel, MD, United States - **Salary:** $100,000.0 - $245,000.0 - **Contract:** Contract - **Skills:** Microsoft Windows, Computing Platforms, Ubuntu (Operating System), Computer Programming, System Configuration, Linux, Interoperability, Python (Programming Language), Linux System Administration, Linux Servers, MATLAB, Package Management Systems, Red Hat Enterprise Linux, Shell Script, Software Vulnerability Management, Data Logging, Scripting, System Availability, Software Security, Gitlab, Information Technology, Engineering Base, Vulnerability Analysis, Vmware - **Published:** October 23, 2026 - **Apply:** https://diversityjobs.com/career/18698472/Linux-Systems-Administrator-Maryland-Laurel ## About the Role Do you have a passion for Linux systems administration? Do you have experience with systems administration for classified systems?, The Strategic Missile Defense Program Area (AH1) is seeking a motivated and experienced Linux Systems Administrator to join the Homeland Defense Mission Area (HDMA) Classified Information Systems Section., * Have a Bachelor's degree in Computer Science, Information Technology, Engineering, or a related field with three years of relevant experience; a master's degree with one year of relevant experience; a Ph.D. with no additional experience; or five years of relevant experience in lieu of a degree. * Have professional experience administering Linux systems in secure, laboratory, development, or similarly complex environments. * Are proficient with Red Hat Enterprise Linux, Ubuntu, or similar enterprise Linux distributions. * Have experience installing, configuring, securing, patching, and troubleshooting Linux servers, workstations, and applications. * Understand Linux user and group administration, permissions, services, logging, auditing, package management, and access controls. * Have experience with shell scripting, Python, or another programming or scripting language. * Understand interoperability between Linux and Windows systems. * Possess strong written, verbal, problem-solving, and teamwork skills. * Hold an active Interim Secret level security clearance and can ultimately obtain a TS level clearance. If selected, you will be subject to a government security clearance investigation and must meet the requirements for access to classified information. Eligibility requirements include U.S. citizenship. * Hold a current DoD 8570/8140-aligned certification, such as Security+, CASP+, or CISSP, or can obtain the required certification within six months of employment. You'll go above and beyond our minimum requirements if you... * Hold an active DoD Secret or Top Secret clearance. * Have experience administering Linux systems in classified environments. * Have experience implementing STIGs and supporting RMF, NIST, vulnerability-scanning, or compliance activities. * Have experience with VMware or another virtualization platform. * Have experience managing patch repositories, endpoint security tools, or backup and restoration solutions. * Have experience supporting secure software-development, build, testing, and deployment environments. * Have experience supporting GitLab, MATLAB, engineering applications, or simulation environments. ## Description As a Linux Systems Administrator, you will work collaboratively with other section staff, the Section Supervisor, Green Team Project Manager, Program Managers (PMs), and Assistant Program Managers (APMs) to design, implement, administer, optimize, and secure Linux computing environments supporting the highly classified program portfolio managed by the Air and Missile Defense Sector Green Team., * Design, implement, configure, and optimize complex Linux computing environments and infrastructure supporting laboratory, development, and mission-critical systems. * Evaluate technical requirements and develop Linux solutions that balance security, performance, reliability, scalability, compatibility, and operational needs. * Lead Linux system deployments, upgrades, migrations, patching, modernization efforts, and infrastructure improvement initiatives across legacy and modern platforms, including Red Hat Enterprise Linux and Ubuntu. * Analyze and resolve complex operating system, network, application, performance, hardware, kernel, driver, and software compatibility issues, including managing custom RPMs and other specialized configurations. * Implement and oversee system-hardening standards, security controls, vulnerability management activities, and remediation efforts in accordance with STIG, RMF, NIST, and other applicable security and compliance requirements. * Evaluate technical and cybersecurity risks and recommend appropriate mitigation strategies while maintaining system availability and supporting mission requirements. * Install, configure, integrate, and maintain engineering, scientific, and development applications, including GitLab and MATLAB, within secure and classified environments. * Integrate Linux and Windows platforms to support hybrid engineering, development, and simulation workflows. * Develop scripting, automation solutions, technical standards, and operational improvements that increase the efficiency, consistency, security, and reliability of system administration activities. * Lead root-cause analysis activities and recommend long-term corrective actions for recurring issues. * Serve as a technical resource and advisor to project teams, engineers, cybersecurity personnel, and leadership. * Develop and maintain technical documentation, standards, procedures, and implementation guidance. * Evaluate emerging technologies and recommend enhancements that improve organizational capabilities. * Mentor and provide technical guidance to less experienced staff.