Job Summary
The ideal candidate brings deep hands-on Linux administration experience and is comfortable supporting mission-critical Development, Test, and Production environments using command-line tools, system logs, automation, and established change-management processes. The Linux Systems Administrator will serve as a senior technical resource responsible for system configuration, automation, security hardening, vulnerability remediation, monitoring, troubleshooting, and continuous improvement of Linux-based infrastructure and operational practices.
Primary Responsibilities
- Administer, configure, secure, monitor, and troubleshoot RHEL/Linux systems across Development, Test, and Production environments supporting mission-critical workloads.
- Lead troubleshooting and root-cause analysis across operating systems, applications, storage, authentication, performance, and network connectivity using Linux command-line tools, system logs, and monitoring platforms.
- Manage Linux system lifecycle activities including account and permission administration, patching, package management, software installation, service configuration, upgrades, and ongoing system maintenance.
- Implement and maintain Linux security controls, hardening standards, vulnerability remediation, configuration baselines, and compliance requirements.
- Develop and maintain automation and configuration-management solutions using Ansible, Bash, Python, or comparable technologies to improve consistency, reliability, and operational efficiency.
- Independently research and resolve complex technical issues while collaborating with SAs, DBAs, SWEs, SEs, testers, and other team members to develop sustainable solutions and promote knowledge sharing across the team.
- Develop and maintain technical documentation, SOPs, operational runbooks, system configurations, and change records, and participate in rotational on-call support for the mission environment.
Basic Qualifications
- Bachelor’s degree in a technical discipline from an accredited college or university and ten (10) years of related experience. Five (5) years of additional related experience may be substituted for a bachelor’s degree.
- Extensive hands-on Linux systems administration experience, including RHEL or comparable enterprise Linux distributions, supporting complex production environments.
- Experience administering Linux systems including accounts and permissions, package management, patching, system services, storage, authentication, system configuration, and performance monitoring.
- Hands-on experience with automation or configuration management using Ansible or comparable technologies, along with Bash and/or Python scripting.
- Strong Linux troubleshooting skills and knowledge of networking fundamentals including DNS, TCP/IP, IP addressing, ports, routing, and firewalls.
- Experience with Linux security hardening, vulnerability remediation, configuration management, and formal change-control processes.
- Active TS/SCI with polygraph.
Desired Qualifications
- Advanced experience with Ansible and RHEL 9, including automated configuration, provisioning, and repeatable system administration.
- Experience with AWS, including EC2, Systems Manager (SSM), CloudFormation, and associated monitoring and operational services.
- Experience with FIPS, SELinux, fapolicy, STIG requirements, vulnerability remediation, and Linux security controls.
- Experience with PKI, including certificates, keys, trusted authorities, and certificate revocation lists.
- Experience with Git-based workflows, Terraform/CloudFormation, Salt, or other infrastructure/configuration automation technologies.
- Experience supporting Kubernetes/container platforms and monitoring, logging, or security technologies such as Splunk, Elastic, CloudWatch, SIEM solutions, or Nessus.
- Experience with Jira and Confluence and supporting Linux infrastructure within secure government, Intelligence Community, DoD, or similarly regulated environments.
CSSRC
conmd
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:August 25, 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 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.
Skills Required
- Bachelor's degree in a technical discipline and 10 years of related experience, or 5 additional years of related experience in lieu of a degree
- Extensive hands-on Linux systems administration experience, including RHEL or comparable enterprise Linux distributions, in complex production environments
- Experience administering accounts and permissions, package management, patching, system services, storage, authentication, system configuration, and performance monitoring
- Hands-on experience with Ansible or comparable automation/configuration-management technologies, plus Bash and/or Python scripting
- Strong Linux troubleshooting skills and knowledge of DNS, TCP/IP, IP addressing, ports, routing, and firewalls
- Experience with Linux security hardening, vulnerability remediation, configuration management, and formal change-control processes
- Active TS/SCI clearance with polygraph
- Advanced experience with Ansible and RHEL 9
- Experience with AWS, including EC2, Systems Manager, CloudFormation, and monitoring and operational services
- Experience with FIPS, SELinux, fapolicy, STIG requirements, vulnerability remediation, and Linux security controls
- Experience with PKI, certificates, keys, trusted authorities, and certificate revocation lists
- Experience with Git-based workflows, Terraform, CloudFormation, Salt, or similar infrastructure automation technologies
- Experience supporting Kubernetes/container platforms and technologies such as Splunk, Elastic, CloudWatch, SIEM solutions, or Nessus
- Experience with Jira and Confluence and Linux infrastructure in secure government, Intelligence Community, DoD, or similarly regulated environments
Leidos Compensation & Benefits Highlights
The following summarizes recurring compensation and benefits themes identified from responses generated by popular LLMs to common candidate questions about Leidos and has not been reviewed or approved by Leidos.
-
Healthcare Strength — Healthcare coverage is described as comprehensive, with multiple plan options, low office-visit copays in some plans, and access to mental health and wellness support tools. The availability of HSA/FSA options and employer contributions is positioned as a meaningful part of the total package.
-
Retirement Support — Retirement benefits are framed as a strong component of total rewards, highlighted by a 401(k) match and immediate vesting in the standard package. The Employee Stock Purchase Plan is also presented as an additional long-term wealth-building feature.
-
Wellbeing & Lifestyle Benefits — Wellbeing and lifestyle supports extend beyond core insurance, including wellness programs, fitness-related stipends, and assistance resources. Work flexibility and related perks are also included as part of the broader rewards experience.
Leidos Insights
What We Do
We Are Leidos For 50 years we have been tackling some of the biggest problems that face our nation and our world. OUR MISSION Through our culture of innovation and history of performance, we develop deep customer trust built on integrity and create enduring solutions that improve our world. Leidos is a science and technology solutions leader working to address some of the world’s toughest challenges in the defense, intelligence, homeland security, civil, and healthcare markets. The company’s 43,000 employees support vital missions for government and commercial customers. Headquartered in Reston, Va., Leidos reported annual revenues of approximately $11.09 billion for the fiscal year ended January 3, 2020. Leidos was cited for the meaningful work employees perform that is challenging, impactful, and aligned with our customers’ missions as reasons professionals want to work and stay at our company. Leidos has also been named to lists including Forbes’ Best Employers for Diversity, Forbes’ America’s Best Employers for Women, Military Times Best for Vets Employers, and Ethisphere Institute’s World's Most Ethical Companies®. Employees enjoy career enrichment opportunities available through mobility and development and experience rewarding relationships with supportive supervisors and talented colleagues and customers. Employees appreciate our flexible work environment, allowing for and encouraging a true work-life balance. Our professionals are also excited about our Employee Resource Groups, like the newly launched Collaborative Outreach with Remote and Embedded Employees (CORE), which strives to create an environment where every employee, regardless of location, feels fully engaged as a valued employee of Leidos. Your most important work is ahead.
