Linux Systems Engineer

** Description*
* Leidos is seeking a  
** Linux Systems Engineer
** to support a mission-critical customer environment in Chantilly, VA. This position is ideal for a hands-on Linux administrator or systems engineer with experience supporting  
** Linux servers in virtualized environments and maintaining system security and compliance requirements** .

The successful candidate will support day-to-day system administration, engineering, configuration management, virtualization, and security operations across a multi-network environment.

** Candidates must currently possess an active TS/SCI with the required Polygraph and be eligible for customer crossover.*
* ** Primary Responsibilities*
* + Administer, configure, maintain, and troubleshoot  
** Linux-based systems and servers
** within a virtualized environment.

+ Maintain the operational security posture of information systems and support day-to-day system security operations.

+ Perform and support  
** system vulnerability scans, security audits, remediation, and compliance activities** .

+ Implement and maintain system security configurations and requirements.

+ Provide configuration management for information system hardware, software, firmware, and security components.

+ Support system engineering activities, including planning, designing, analyzing, and improving hardware- and software-based system processes.

+ Troubleshoot complex system and infrastructure issues and develop effective technical solutions.

+ Support systems operating across multiple network environments.

+ Work collaboratively with engineers, developers, technicians, analysts, and users to identify requirements and resolve technical issues.

+ Investigate and document existing system architectures and configurations.

+ Support operational systems in a dynamic mission environment.

** Basic Qualifications*
* +  
** Active TS/SCI with the required Polygraph.*
* + Bachelor's degree and approximately 12 years of relevant experience.

+ At least four years of recent experience supporting systems engineering, system administration, system processes, and/or software development methodologies.

+ Demonstrated hands-on experience with  
** Linux system administration and engineering** .

+ Experience maintaining the  
** security posture of information systems** , including system scans, security audits, and day-to-day security operations.

+

Experience with configuration management of system hardware, software, firmware, and security components.

+ Demonstrated ability to troubleshoot and solve complex technical problems.

+ Experience working as part of a multidisciplinary technical team.

+ Strong verbal and written communication skills.

** Preferred Qualifications*
* +

Experience with  
** Red Hat Enterprise Linux (RHEL)** .

+ Experience implementing or maintaining  
** DISA STIGs or similar system-hardening/security-compliance requirements** .

+

Experience with virtualization and container technologies such as  
** VMware, Red Hat Virtualization, and Docker** .

+ Experience configuring, deploying, or maintaining  
** Identity and Access Management (IdAM), Multi-Factor Authentication (MFA), and PKI-enabled systems** .

+ Experience translating user and developer use cases into technical system requirements.

+ Experience documenting existing system architectures.

+ Experience supporting operational mission systems.

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:*
* October 22, 2026

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