> Markdown version of [/jobs/ext/2598806-linux-and-windows-systems-administrator](https://www.wearedevelopers.com/jobs/ext/2598806-linux-and-windows-systems-administrator). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Linux and Windows Systems Administrator - **Company:** Leidos, Inc. - **Location:** Beavercreek, OH, United States - **Experience:** Experienced - **Salary:** $69,550.0 - $125,725.0 - **Contract:** Permanent contract - **Skills:** Microsoft Windows, Active Directory, Automation of Tests, Bash Shell, Ubuntu (Operating System), Configuration Management, CompTIA Security+, Cyber Security, Dynamic Host Configuration Protocol, Linux, Domain Name System (DNS), File Server, Hyper-V, Network Troubleshooting, Windows Servers, Network Connections, Windows PowerShell, Red Hat Enterprise Linux, Ansible, Runbook, Security Content Automation Protocol, Systems Integration, TCP/IP, Virtual Local Area Networks, Virtualization Technology, Software Vulnerability Management, Data Logging, Network Switches, Software Repository, System Availability, Infrastructure Automation Frameworks, Tenable Nessus, Vulnerability Analysis, Vmware - **Published:** August 15, 2026 - **Apply:** https://www.dice.com/job-detail/4a1d16f8-1824-4d03-af9a-966dc8b89632 ## About the Role * Current Active DoD Secret security clearance. * Current CompTIA Security+ certification. * Bachelor\'s degree in a technical field with 2-4 years of relevant experience. Additional years of experience may be considered in lieu of a degree. * Experience administering Windows Server and Linux systems in secure or air-gapped environments. * Experience implementing DISA STIGs, SCAP, NIST 800-53 security controls, and system hardening practices. * Experience administering: + Active Directory + DNS + DHCP + File Servers * Experience building, integrating, maintaining, troubleshooting, and remediating Windows and Linux systems. * Experience deploying operating systems using PXE, Kickstart, ISO/disk imaging, and automated installation methods. * Experience configuring and troubleshooting Layer 2 switching, VLANs, TCP/IP, and network connectivity. * Experience managing Windows and Linux updates, patching, and vulnerability remediation. * Ability to develop automation scripts using PowerShell and Bash. * Familiarity with Linux software repository management. * Ability to work independently and collaboratively with minimal supervision. * Strong analytical, communication, and problem-solving skills., * Red Hat Certified System Administrator (RHCSA) certification. * Experience administering VMware, Hyper-V, or other virtualized environments. * Experience with automation and configuration management tools, including Ansible. * Experience supporting secure or classified DoD environments. * Knowledge of backup, recovery, logging, and monitoring solutions. * Experience performing DISA STIG remediation, SCAP compliance validation, and vulnerability scanning using Tenable Nessus. If you\'re looking for comfort, keep scrolling. At Leidos, we outthink, outbuild, and outpace the status quo - because the mission demands it. We\'re not hiring followers. We\'re recruiting the ones who disrupt, provoke, and refuse to fail. Step 10 is ancient history. We\'re already at step 30 - and moving faster than anyone else dares. ## Description Leidos Corporate Information Security Office (CISO), reporting through the Digital sector, is seeking a Linux and Windows System Administrator to support and maintain complex classified environments. The selected candidate will be responsible for administering, securing, troubleshooting, and maintaining Windows and Linux systems across physical and virtual infrastructures. This role supports mission-critical operations by ensuring system availability, compliance with security requirements, and reliable day-to-day operations within a secure enterprise environment., * Administer and maintain Windows Workstations, Windows Server, and Linux systems (RHEL, Rocky Linux, Ubuntu) across physical, virtual, and air-gapped environments. * Perform Tier 2 incident resolution, troubleshoot technical issues, conduct root-cause analysis, and collaborate with engineering, cybersecurity, and stakeholders to resolve complex problems. * Execute system patching, vulnerability remediation, configuration management, and compliance activities. * Implement and maintain monitoring, logging, backup and recovery solutions, and operational documentation/runbooks. * Support account and access administration in accordance with least-privilege principles and organizational security policies. * Automate repetitive administrative tasks using PowerShell, Bash, Ansible, or similar automation tools. * Deploy and maintain operating system images using PXE/network boot, Kickstart, disk imaging, answer files, and automated installation methods. * Perform system hardening and security compliance using DISA STIGs, SCAP, and NIST 800-53 security controls. * Administer and troubleshoot Active Directory, DNS, DHCP, file servers, virtualization platforms, and Layer 2 network switching, including VLAN configuration, TCP/IP connectivity, and switch port administration in an air-gapped environment. * Support dual-boot bare-metal systems and virtualized environments. * Participate in after-hours support and on-call rotations as required. * Research, analyze, and resolve Windows, Linux, and networking issues to maintain system availability, reliability, and performance. ## Related Videos - [An Applied Introduction to eBPF with Go](https://www.wearedevelopers.com/videos/1075-an-applied-introduction-to-ebpf-with-go) - [Security Pitfalls for Software Engineers](https://www.wearedevelopers.com/videos/726-security-pitfalls-for-software-engineers) - [WebAssembly: The Next Frontier of Cloud Computing](https://www.wearedevelopers.com/videos/972-webassembly-the-next-frontier-of-cloud-computing) - [Docker network without Docker](https://www.wearedevelopers.com/videos/1418-docker-network-without-docker) - [Turning Container security up to 11 with Capabilities](https://www.wearedevelopers.com/videos/718-turning-container-security-up-to-11-with-capabilities) - [My journey into DevOps world - How it all started!](https://www.wearedevelopers.com/videos/545-my-journey-into-devops-world-how-it-all-started) ## Related Articles - [How We Built a Worry-Free System That Runs for 10+ Years – And What We’d Do Again](https://www.wearedevelopers.com/magazine/751-how-we-built-a-worry-free-system-that-runs-for-10-years-and-what-we-d-do-again) - [Fully Remote Software Engineer Jobs](https://www.wearedevelopers.com/magazine/447-fully-remote-software-engineer-jobs) - [What’s the Difference between a Junior, Mid, and Senior Developer?](https://www.wearedevelopers.com/magazine/238-what-s-the-difference-between-a-junior-mid-and-senior-developer) - [The Most Popular IT Jobs on the Market](https://www.wearedevelopers.com/magazine/376-the-most-popular-it-jobs-on-the-market) - [9 Ways to Make Money Hacking](https://www.wearedevelopers.com/magazine/333-9-ways-to-make-money-hacking) - [What Are The Top Skills Required For Azure Developers?](https://www.wearedevelopers.com/magazine/77-what-are-the-top-skills-required-for-azure-developers)