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Leidos’ Defense is seeking a Information Linux System Administrator to join our team at our Bowie, MD office. The candidate will be part of a IT team responsible for the design, deployment, maintenance, configuration management, monitoring, and troubleshooting of an expanding wide area network supporting a multi-site secure network. The work to be performed will require that the candidate be able to work comfortably at several levels of support from supporting IT system administration tickets from installation, configuration, and troubleshooting of Linux workstations to servers’ equipment. Provide updates to the IT Manager and ISSM for strategic planning purposes.

Projects and tasks will be assigned and at times self-initiated requiring independent judgement in balancing of resources, schedules, work hours, as well as travel to regional sites to obtain results. Work will require ability to manage the risk for PC workstations and peripherals, and ancillary equipment.

If this sounds like the kind of environment where you can thrive, keep reading!

Leidos Defense Systems Sector provides a diverse portfolio of systems, solutions, and services covering land, sea, air, space, and cyberspace for customers worldwide. Solutions for Defense include enterprise and mission IT, large-scale intelligence systems, command and control, geospatial and data analytics, cybersecurity, logistics, training, and intelligence analysis and operations support. Our team is solving the world’s toughest security challenges for customers with “can’t fail” missions. To explore and learn more, click here!

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Primary Responsibilities

The selected individual will be responsible for performing daily Linux system administration and O&M support activities in support of a complex network environment with geographically distributed systems. The position entails the daily sustainment of existing computing and network systems at various locations, with a particular focus on the set-up and maintenance of an off-site location. Will be responsible for monitoring infrastructure systems, applications, and processes, and for ensuring that all issues are identified, tracked, and resolved in a timely manner. She/he will provide support for all infrastructure systems and will respond to hardware and software incidents impacting local users as well as working with and taking directions from senior system administrators, at times working with them remotely from other locations.

Additional responsibilities include:

• Provide system administration / installation / configuration / troubleshooting for mission and analytic networks.

• User account management, administration, access/controls and support.

• Installation, configuration, and management of servers and performance.

• Kernel parameter and disk partition modification.

• Ansible and playbook creation and management.

• Satellite server configuration and management.

• Red Hat Identity management.

• Support to WAN infrastructure

• Client-server support, Linux software packages and hardware upgrades.

• Provide regression testing on new software releases.

• Perform OS compliance with DISA STIGS.

• Developing/documenting standard operating procedures.

• Endpoint Protection within Linux environment

• Understanding of Linux internals (system calls, file systems, processes, etc.).

• Understanding of TCP/IP and related protocols (HTTP, HTTPS, SSH, NFS).

Basic Qualifications

• BS degree and 8 – 12 years of prior relevant experience or Master’s with 6 – 10 years of prior relevant experience. May possess a Doctorate in technical domain.

• Must have technical experience configuring IT software programs that utilize complex equipment/systems (ex. Linux operating systems, VMware, Dell Power Edge Servers, Backup Servers, File Storage, etc.).

• Must have technical experience troubleshooting IT software programs that utilize complex equipment/systems (ex. Linux operating systems, VMware, Dell Power Edge Servers, Backup Servers, File Storage, etc.).

• Must have technical experience monitoring IT software programs that utilize complex equipment/systems (ex. Linux operating systems, VMware, Dell Power Edge Servers, Backup Servers, File Storage, etc.).

• Must have experience with the DISA STIGS

• Must have experience with IT system optimization, monitoring, and/or other technical set-up and troubleshooting.

• Must have experience providing information for and documenting technical processes.

• Must have experience or strong familiarity with Data Center design, configuration, and support (e.g. rack and stack, power, placement, etc.).

• Must be capable of responding very quickly to customer inquiries in a clear, concise manner, to include providing detailed and comprehensive status reports and follow-ups.

• Must be committed to adopting and adhering to best practices including compliance with maintenance windows and change control procedures.

• Must possess strong analytic abilities and must be meticulous and careful in their work.

• Must be an independent thinker capable of working proficiently independently as well as within a team.

• Must be able to respond to system administration, operations, and maintenance problems on an as-needed or on-call basis.

• US citizen possess and maintain an active Secret clearance.

• Must be a resident of Bowie, MD or willing to relocate to the Bowie, MD area.

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:

March 31, 2026

For 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.

Pay Range:

Pay Range $92,300.00 - $166,850.00

The Leidos pay range for this job level is a general guideline only and 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.