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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 - **Experience:** Expert - **Salary:** $105,000.0 - $290,000.0 - **Contract:** Permanent contract - **Skills:** Active Directory, Confluence, JIRA, CentOS, Configuration Management, Cyber Security, Information Systems, Computer Networks, System Configuration, Linux, DevOps, Domain Name System (DNS), Monitoring of Systems, Kernel-Based Virtual Machine, Network Security, Linux System Administration, Windows Servers, Nagios, Red Hat Enterprise Linux, Ansible, RSA (Cryptosystem), Service Pack, Single Sign-On, Tape Libraries, Virtualization Technology, Enterprise Software Applications, Saltstack, Reliability of Systems, Peripherals, Gitlab, Containerization, Selinux, Kubernetes, Infrastructure Automation Frameworks, Information Technology, Data Management, Slurm, Puppet, Docker, Vulnerability Analysis, User Accounts, Vmware - **Published:** July 30, 2026 - **Apply:** https://diversityjobs.com/main/sendform/8/8/28176/1/17739931?backUrl=%2Fcareer%2F17739931%2FLinux-Systems-Administrator-Maryland-Laurel ## About the Role Do you thrive in and love a fast-paced, dynamic classified environment?Do you love to [area of expertise]?, * Possess a Bachelor's degree in Computer Science, Information Technology, related field or equivalent professional experience. * Have in-depth knowledge of Linux operating systems (Red Hat, CentOS, or similar) and their administration, including system installation, configuration, maintenance, and troubleshooting. * Hands-on experience administering/maintaining classified computer networks. * Have 5+ years Linux systems administration experience. * Possess a demonstrable understanding of Linux firewalls and SELinux. * Can work independently and as part of a team to identify and resolve issues, both at a system and network level, minimizing downtime and customer impact. * Relevant certifications such as Red Hat Certified System Administrator (RHCSA). * Have working knowledge of Linux Single Sign-on (SSO) utilizing realm, adcli, sssd tying into Active Directory. * Have familiarity with virtualization technologies (VMware, KVM, or similar) and containerization (Docker, Podman, Kubernetes). * Have familiarity with hosting and administrating software packages such as Gitlab, Confluence, Jira. * Experience administering and maintaining network license servers * Possess Backup and Recovery experience using Legato/Networker utilizing both tape library and storage as media * Experience utilizing NPE certificates, public/private keys, SSL/TLS communications and protocols. * Automation experience to automate manual efforts. * Experience configuring and troubleshooting layer 2 networks. * Experience applying STIGs to operating systems, applications and network peripherals. * Experience with monitoring software such as Nagios and Thruk. * Superb communication and collaboration skills effectively working and interacting with a team. * Current DoD 8570 certification (Security+ or CISSP), or ability to obtain DoD 8570 certification within 6 months of employment required. * Have an active Top Secret SCI w/poly security clearance. If selected, you will be subject to a government security investigation and must meet the requirements, * A Master's degree in Information Systems/Technology, Cybersecurity or Computer Science or related field. * Possess an active G2/G3 clearance with active poly. * Experience working with configuration management tools such as Salt-Stack, Puppet, Ansible, or Chef. * DevOps experience integrating CI/CD pipelines. * Experience implementing NAS/SAN enterprise storage solutions. * Experience with Linux HPC's utilizing Slurm. * Experience working with Windows Servers and Server functions such as Group Policy, Active Directory, DNS etc. * Working Experience with Exchange, RSA, Radius a plus ## Description infrastructure. As a Linux System Administrator, you will play a vital role designing and deploying robust scalable physical and virtual systems, managing security, consulting on projects and maintaining the performance of our on-premise classified Linux systems and infrastructure. As a Linux Systems Administrator you will... * Manage, configure, and maintain classified Linux-based systems. This includes OS installation and configuration management, deploying security patches, system monitoring and performance management, troubleshooting hardware and software issues, and completing daily system administration health checks. * Implement security measures to protect classified information, following relevant compliance policies, guidelines, and regulatory requirements. Perform security audits, vulnerability assessments, apply necessary security patches and updates. * Work closely with ISSO/ISSM's to validate systems, maintain network security posture and verify security vulnerabilities are addressed. Ensure enhanced security requirements balance with project requirements and functionality. * Provide technical support to end-users in a classified environment, lead problem root cause analysis and resolution. Assist on projects, software installation and responding to customer inquiries. Provision user accounts, enable permissions, and verify access controls comply with security protocols. * Respond to and resolve system-related incidents and issues promptly, engaging IT peers and external resources, when necessary, to ensure minimal downtime and disruption to operations. * Develop and maintain comprehensive documentation, including standard operating procedures (SOPs), system configurations, troubleshooting guides, and knowledge base articles. Continuously improve processes and procedures to enhance system reliability, efficiency, and security. ## Related Videos - [Running Secure Life Science Research at Scale using Hybrid GPU HPC and Kubernetes 🧬](https://www.wearedevelopers.com/videos/100355-running-secure-life-science-research-at-scale-using-hybrid-gpu-hpc-and-kubernetes) - [Docker network without Docker](https://www.wearedevelopers.com/videos/1418-docker-network-without-docker) - [Improving quality with Agentic AI with Rovo Dev and Xray](https://www.wearedevelopers.com/videos/2005-improving-quality-with-agentic-ai-with-rovo-dev-and-xray) - [What makes Cybersecurity different for critical infrastructure?](https://www.wearedevelopers.com/videos/571-what-makes-cybersecurity-different-for-critical-infrastructure) - [Docker exec without Docker](https://www.wearedevelopers.com/videos/1094-docker-exec-without-docker) - [Security Pitfalls for Software Engineers](https://www.wearedevelopers.com/videos/726-security-pitfalls-for-software-engineers) ## Related Articles - [Dev Digest 134 - Where pixels sing?](https://www.wearedevelopers.com/magazine/477-dev-digest-134-where-pixels-sing) - [Is Software Engineering Over-Saturated?](https://www.wearedevelopers.com/magazine/418-is-software-engineering-over-saturated) - [Highest Paying Tech Companies for Developers](https://www.wearedevelopers.com/magazine/220-highest-paying-tech-companies-for-developers) - [9 Ways to Make Money Hacking](https://www.wearedevelopers.com/magazine/333-9-ways-to-make-money-hacking) - [Best Paying Jobs in Technology](https://www.wearedevelopers.com/magazine/256-best-paying-jobs-in-technology) - [Best Coding Boot Camps in Germany](https://www.wearedevelopers.com/magazine/237-best-coding-boot-camps-in-germany)