Senior Linux System Administrator

Description

The ESA V program is an IT Services program supporting several customers within the Department of Justice. The program provides a range of IT services, including help desk, deskside support, Windows workstation engineering and maintenance, managed print services, ITSM, Active Directory services, and video conferencing, as well as IT Infrastructure Operations and Engineering support.

Leidos is hiring a Senior Linux System Administrator to provide on-site support in Fairfax, VA at the customer enterprise data center. to users within the Department of Justice. This position requires a current active Secret clearance.

Primary Responsibilities

The successful candidate will work independently and as part of a team, performing high-level systems analysis, evaluation, design, integration, documentation, and implementation of complex Red Hat systems supporting applications that require a thorough knowledge of administrative and technical skills. Performs all duties of Red Hat administration including installation, configuration, securing, performance tuning, and troubleshooting. Applies higher-level business or technical principles and methods to very difficult technical problems to arrive at an engineering solution. Prepares technical reports and related documentation, and makes charts and graphs as needed to record results. Prepares and deliver presentations and briefings as required by the Task Order.

Basic Qualifications

Bachelor's Degree with 12+ years' experience as a Unix System Administrator – Operational experience with RHEL8 and RHEL9. High school diploma with additional years' experience may be considered in lieu of a degree.

Must have Active Secret security clearance

• Must have Active Secret security clearance
• 3+ years deploying Unix in secured environments, i.e., DISA
• 3+ years using, updating and maintaining Red Hat Satellite
• Documenting system processes for Unix environments
• HW experience: Knowledge of Dell Servers, iDRAC, VMWare, AWS and Azure
• SW experience: Operating Systems: RHEL8 and RHEL 9
• Red Hat Satellite Server and Red Hat PCS Clustering
• Experience with running Red Hat systems with SELINUX in "enforcing" mode
• Experience with configuring PAM (Pluggable Authentication Modules) on RHEL to enable 2-factor authentication via RSA and/or Active Directory
• Proficiency in developing and maintaining Ansible playbooks for system automation

Preferred Qualifications

• VMWare Aware
• Azure Aware
• AWS Aware
• Experience with RHEL 10
• Experience with Ansible Automation Platform
• Experience with the File Access Policy Daemon (fapolicyd) Service
• DISA environment hardening experience
• Docker/Containers
• ServiceNow experience
• Complex KornShell (ksh) or bash scripting
• Ability to apply user requirements to the analysis, planning, and design of technology systems.
• Ability to communicate problems and solutions both verbally and in writing to the Government Lead.
• Ability to work independently and troubleshoot problems with speed and efficiency.
• Ability to work closely with others in a team environment
• Ability to interface with all customer levels.

• Strong analytical and problem-solving skills

• Strong analytical and problem-solving skills

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.

December 11, 2025

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 $116, $210,325.00

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.

About Leidos

Leidos is an industry and technology leader serving government and commercial customers with smarter, more efficient digital and mission innovations. Headquartered in Reston, Virginia, with 47,000 global employees, Leidos reported annual revenues of approximately $16.7 billion for the fiscal year ended January 3, 2025. For more information, visit

Pay and Benefits

Pay and benefits are fundamental to any career decision. That's why we craft compensation packages that reflect the importance of the work we do for our customers. Employment benefits include competitive compensation, Health and Wellness programs, Income Protection, Paid Leave and Retirement. More details are available at

Securing Your Data

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Commitment to Non-Discrimination

All qualified applicants will receive consideration for employment without regard to sex, race, ethnicity, age, national origin, citizenship, religion, physical or mental disability, medical condition, genetic information, pregnancy, family structure, marital status, ancestry, domestic partner status, sexual orientation, gender identity or expression, veteran or military status, or any other basis prohibited by law. Leidos will also consider for employment qualified applicants with criminal histories consistent with relevant laws.