Linux Systems Support Engineer with Security Clearance

R-00193894 Description Looking for an opportunity to make an impact? 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 sustainably. Everything we do is built on a commitment to do the right thing for our customers, our people, and our community. Our Mission, Vision, and Values guide the way we do business. Your greatest work is ahead!

Leidos Defense Sensors Uncrewed Systems Integration and Test Team is seeking a motivated and ambitious Linux Systems Support Engineer to join the Software, Simulation, Systems Engineering and Integration Directorate (S3I) Joint Technology Center – Systems Integration Lab (JSIL) Technology and Certification Center. As a System Support Engineer, you’ll be an integral part of a dynamic engineering team that provides 24/7 support to the warfighter for critical mission systems. In this role, you’ll be trained in these critical mission systems to support the support desk role.

Your expertise will help support the warfighter in the field, as you provide help desk duties for these mission critical systems. If this sounds like the kind of environment where you can thrive, keep reading! Leidos Defense Sensor 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 ! Are you ready to make an impact? Share your resume with us today! Primary Responsibilities

• Assist development teams with software release testing, to include running test cases, creating bug tickets and diagnosing issues.
• Provide troubleshooting and support for mission-critical systems, focusing on Linux-based environments and containerized applications.
• Develop and maintain comprehensive documentation for supported systems, including configuration guides, troubleshooting procedures, and knowledge base articles.
• Perform system installation, configuration, and support of fielded systems.
• Contribute to the continuous improvement of support processes and tools.
• Assist the development team by completing entry-level to intermediate-level scripts and coding tasks.
• Role includes providing end-user support of unique and complex systems via phone, email and Teams. Providing remote support will include assisting the user with configuration changes, patch updates, and functionality testing.

Basic Qualifications

• Bachelor’s degree in a STEM field with 2 years of relevant experience.  In lieu of a degree, candidates with 5 years of experience will be considered.
• Must be an U.S. citizenship, possess and able to maintain a Final Secret Clearance required.
• Configuration support for the end user.
• Remote software troubleshooting with end user.
• Remote network troubleshooting with end user.
• Software testing for development team.
• Experience with support tools and process refinement.
• Documentation of issues, resolutions, and knowledge base articles.

Preferred Qualifications

• RedHat or other Linux distro experience.
• Experience and demonstrated skills in the following support this position:
• Experience in Jira, Confluence, and exposure to GitLab.
• Experience as system administrator.
• Experience in a service desk environment to include using ticketing system to track issues and issue resolution.
• Strong attention to detail.
• Strong experience with troubleshooting independently.
• Experience with RedHat OpenShift, Kubernetes, or other containerization implementation.
• Experience with TCP/IP networks.
• Knowledge of scripting languages such as Python, Bash, or PowerShell.
• Strong documentation and communication skills.
• Ability to acquire IAT Level II Certification

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 6, 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 $69,550.00 - $125,725.00 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 www. Leidos.com . 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 www.leidos.com/careers/pay-benefits . Securing Your Data Beware of fake employment opportunities using Leidos’ name. Leidos will never ask you to provide payment-related information during any part of the employment application process (i.e., ask you for money), nor will Leidos ever advance money as part of the hiring process (i.e., send you a check or money order before doing any work).

Further, Leidos will only communicate with you through emails that are generated by the Leidos.com automated system – never from free commercial services (e.g., Gmail, Yahoo, Hotmail) or via WhatsApp, Telegram, etc. If you received an email purporting to be from Leidos that asks for payment-related information or any other personal information (e.g., about you or your previous employer), and you are concerned about its legitimacy, please make us aware immediately by emailing us at .

If you believe you are the victim of a scam, contact your local law enforcement and report the incident to the U.S. Federal Trade Commission . 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. #Remote