Linux and Windows Systems Administrator
$69K - $125K/yr
... virtual infrastructures. This role supports mission-critical operations by ensuring system ... collaborate with engineering, cybersecurity, and stakeholders to resolve complex problems.
$69K - $125K/yr
... virtual infrastructures. This role supports mission-critical operations by ensuring system ... collaborate with engineering, cybersecurity, and stakeholders to resolve complex problems.
$69K - $125K/yr
... virtual infrastructures. This role supports mission-critical operations by ensuring system ... collaborate with engineering, cybersecurity, and stakeholders to resolve complex problems.
Dayton, OH · On-site
$90 - $120/hr
The engineer is responsible for implementing complex digital signal processing (DSP) algorithms ... Develop low-level C/C++ drivers, Linux kernel modules, and APIs to connect FPGA logic with embedded ...
Dayton, OH · On-site
$90 - $120/hr
The engineer is responsible for implementing complex digital signal processing (DSP) algorithms ... Develop low-level C/C++ drivers, Linux kernel modules, and APIs to connect FPGA logic with embedded ...
Fairborn, OH · On-site
$130K - $150K/yr
Deep knowledge of system internals (Linux kernel, OS-level scheduling) or network programming (TCP/UDP, sockets) * Open Source / Ecosystem : Significant experience leveraging or contributing to ...
Fairborn, OH · On-site
$130K - $150K/yr
Deep knowledge of system internals (Linux kernel, OS-level scheduling) or network programming (TCP/UDP, sockets) * Open Source / Ecosystem : Significant experience leveraging or contributing to ...
Fairborn, OH · On-site
$130K - $150K/yr
Deep knowledge of system internals (Linux kernel, OS-level scheduling) or network programming (TCP/UDP, sockets) * Open Source / Ecosystem: Significant experience leveraging or contributing to ...
Fairborn, OH · On-site
$130K - $150K/yr
Deep knowledge of system internals (Linux kernel, OS-level scheduling) or network programming (TCP/UDP, sockets) * Open Source / Ecosystem: Significant experience leveraging or contributing to ...
... engineers. This role spans the full infrastructure stack-virtualization, identity, storage ... Build, deploy, and maintain virtual machines and services on enterprise virtualization platforms ...
... engineers. This role spans the full infrastructure stack-virtualization, identity, storage ... Build, deploy, and maintain virtual machines and services on enterprise virtualization platforms ...
... engineers. This role spans the full infrastructure stack-virtualization, identity, storage ... Build, deploy, and maintain virtual machines and services on enterprise virtualization platforms ...
... engineers. This role spans the full infrastructure stack-virtualization, identity, storage ... Build, deploy, and maintain virtual machines and services on enterprise virtualization platforms ...
... physical and virtual server environments * Lead the design, analysis, configuration, and ... Linux Systems Engineer, or related infrastructure engineering role * Expertise with Linux and/or ...
... physical and virtual server environments * Lead the design, analysis, configuration, and ... Linux Systems Engineer, or related infrastructure engineering role * Expertise with Linux and/or ...
Beavercreek, OH · On-site
$69K - $125K/yr
... virtual infrastructures. This role supports mission-critical operations by ensuring system ... collaborate with engineering, cybersecurity, and stakeholders to resolve complex problems.
Beavercreek, OH · On-site
$69K - $125K/yr
... virtual infrastructures. This role supports mission-critical operations by ensuring system ... collaborate with engineering, cybersecurity, and stakeholders to resolve complex problems.
Review and approve design from Senior Embedded Engineers, .NET engineers, Cloud engineers, and ... Embedded Linux (Yocto, kernel-level Linux,system), MQTT message brokers, ASP.NET Core microservices ...
New
Quick apply
Review and approve design from Senior Embedded Engineers, .NET engineers, Cloud engineers, and ... Embedded Linux (Yocto, kernel-level Linux,system), MQTT message brokers, ASP.NET Core microservices ...
New
... live, virtual and constructive (LVC); research and development (R&D) activities for DoD agencies ... Ability to read, understand, compile and debug C++ applications on Windows and Linux * Experience ...
... live, virtual and constructive (LVC); research and development (R&D) activities for DoD agencies ... Ability to read, understand, compile and debug C++ applications on Windows and Linux * Experience ...
Dayton, OH · On-site
... DevOps, and Architecture teams for resolution * Manage VDI technologies including troubleshooting and repairing User Virtual Machines (UVMs), building and deploying base images for supported ...
Dayton, OH · On-site
... DevOps, and Architecture teams for resolution * Manage VDI technologies including troubleshooting and repairing User Virtual Machines (UVMs), building and deploying base images for supported ...
Dayton, OH · On-site
... DevOps, and Architecture teams for resolution * Manage VDI technologies including troubleshooting and repairing User Virtual Machines (UVMs), building and deploying base images for supported ...
Dayton, OH · On-site
... DevOps, and Architecture teams for resolution * Manage VDI technologies including troubleshooting and repairing User Virtual Machines (UVMs), building and deploying base images for supported ...
Columbus, OH · On-site
$101K - $137K/yr
Senior Infrastructure Engineer - AIX & Linux * IBM Power Systems, AIX (LPARs, VIOS, NIM ... Citrix Virtual Apps & Desktops (CVAD), Citrix Cloud, Citrix ADC (NetScaler), StoreFront, Workspace ...
Columbus, OH · On-site
$101K - $137K/yr
Senior Infrastructure Engineer - AIX & Linux * IBM Power Systems, AIX (LPARs, VIOS, NIM ... Citrix Virtual Apps & Desktops (CVAD), Citrix Cloud, Citrix ADC (NetScaler), StoreFront, Workspace ...
Design, build, and ship production-quality software across Mac, Windows, Linux, and virtual desktop ... developer in a large enterprise environment, with comfort across both application and ...
Design, build, and ship production-quality software across Mac, Windows, Linux, and virtual desktop ... developer in a large enterprise environment, with comfort across both application and ...
Design, build, and ship production-quality software across Mac, Windows, Linux, and virtual desktop ... developer in a large enterprise environment, with comfort across both application and ...
New
Design, build, and ship production-quality software across Mac, Windows, Linux, and virtual desktop ... developer in a large enterprise environment, with comfort across both application and ...
New
Design, build, and ship production-quality software across Mac, Windows, Linux, and virtual desktop ... developer in a large enterprise environment, with comfort across both application and ...
Design, build, and ship production-quality software across Mac, Windows, Linux, and virtual desktop ... developer in a large enterprise environment, with comfort across both application and ...
Design, build, and ship production-quality software across Mac, Windows, Linux, and virtual desktop ... developer in a large enterprise environment, with comfort across both application and ...
Design, build, and ship production-quality software across Mac, Windows, Linux, and virtual desktop ... developer in a large enterprise environment, with comfort across both application and ...
Dayton, OH · On-site
... DevOps, and Architecture teams for resolution * Manage VDI technologies including troubleshooting and repairing User Virtual Machines (UVMs), building and deploying base images for supported ...
Dayton, OH · On-site
... DevOps, and Architecture teams for resolution * Manage VDI technologies including troubleshooting and repairing User Virtual Machines (UVMs), building and deploying base images for supported ...
$102.76 - $137.02/hr
Provide expert-level administration for Cisco UCS, RHEL Linux and Windows Server environments ... Experience managing virtual networking (vSwitches, distributed switches) and integrating with ...
New
$102.76 - $137.02/hr
Provide expert-level administration for Cisco UCS, RHEL Linux and Windows Server environments ... Experience managing virtual networking (vSwitches, distributed switches) and integrating with ...
New
Cincinnati, OH · On-site
$192K - $289K/yr
Plan and Conduct vulnerability analysis on user and kernel mode drivers and interfaces. * Develop ... Windows, Linux, etc.). * Experience with emulation (Renode, QEMU, etc.) * Reverse engineering ...
Cincinnati, OH · On-site
$192K - $289K/yr
Plan and Conduct vulnerability analysis on user and kernel mode drivers and interfaces. * Develop ... Windows, Linux, etc.). * Experience with emulation (Renode, QEMU, etc.) * Reverse engineering ...
| Aspect | Virtual Linux Kernel Developer | Virtual Linux System Programmer |
|---|---|---|
| Primary Focus | Developing and maintaining Linux kernel code | Writing and optimizing system-level software for Linux |
| Required Skills | C programming, kernel architecture, debugging kernel modules | C, C++, system calls, device drivers |
| Work Environment | Collaborative development, version control, Linux environments | System integration, testing, Linux-based systems |
| Industry Usage | Open-source projects, tech companies, hardware vendors | IT services, embedded systems, enterprise solutions |
While both roles involve Linux and system-level programming, Virtual Linux Kernel Developers focus on kernel code development, whereas Virtual Linux System Programmers work on system software and application interfaces. Understanding these distinctions helps in choosing the right career path or job search focus.

$69K - $125K/yr
Full-time
Re-posted 6 days ago
8.3
Based on 151 frontline employees who took The Breakroom Quiz
77th of 483 rated business services
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.
Location: All work will be performed onsite in our Beavercreek, OH office.
Clearance: You must currently carry an active DoD Secret clearance to qualify for consideration.
Primary Responsibilities
Administer and maintain Windows Workstations, Windows Server, and Linux systems(RHEL, Rocky Linux, Ubuntu) across physical, virtual, and air-gapped environments.
Perform Tier 2incident 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 800-53security 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 networkingissues to maintain system availability, reliability, and performance.
Basic Qualifications
Current Active DoD Secretsecurity 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 Serverand Linuxsystems in secure or air-gapped environments.
Experience implementing DISA STIGs, SCAP, NIST 800-53security 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 PowerShelland Bash.
Familiarity with Linux software repository management.
Ability to work independently and collaboratively with minimal supervision.
Strong analytical, communication, and problem-solving skills.
Preferred Qualifications
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 STIGremediation, SCAPcompliance 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.
Original Posting:July 2, 2026For U.S. Positions: While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above.
The Leidos pay range for this job level is a general guideline onlyand not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law.
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At Leidos, we deliver innovative solutions through the efforts of our diverse and talented people who are dedicated to our customers' success. We empower our teams, contribute to our communities, and operate sustainable practices. Everything we do is built on a commitment to do the right thing for our customers, our people, and our community.
It services
10,000+ Employees
Reston, VA, US