Linux System Administrator

Are you a tech enthusiast with a passion for ensuring the seamless operation of information system environments?

Leidos Defense Systems Sector is looking for a skilled Linux System Administrator to join our team. In this role, you'll be in command of designing, maintaining, and enhancing our portfolio’s architecture, ensuring compliance with information assurance requirements, and guaranteeing continuity of operations. You will work directly with software and radar engineers daily to build and maintain reliable information systems that enable the advancement of modern defense systems. Grow your career with us.

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

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 sustainable. 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.

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!

Are you ready to make an impact? Share your resume with us today!

Primary Responsibilities

• Work primarily on Linux based systems to design, build, integrate, harden, deploy, and maintain bare metal and virtual clients, servers, and networked systems.
• Develop solutions to complex technical issues that impact multiple IT disciplines.
• Effectively use automated hardening and scanning tools such as Ansible and Nessus.
• Perform system analysis for purposes of performance optimization, catastrophe mitigation, and security compliance.
• Collaborate with software developers to ensure systems meet functional requirements.
• Support IT security activities to include security compliance reviews and auditing requirements.
• Perform software configuration management using software development repositories.
• Potential for intermittent international travel to support system installs and maintenance. This may be a future need depending on the growth of the portfolio.

Basic Qualifications

• Bachelor of Science in Technical field and 4-8 years of relevant work experience; equivalent years’ or 8-12 years of relevant experience may be considered in lieu of a degree.
• Must have 3+ years of recent direct System Administrator experience.
• Must be a US citizen, possess and able to maintain an active DoD Secret clearance or be able to obtain and maintain a DoD Secret clearance is required for consideration.
• DoD Directive 8570 / 8140 Information Assurance Technical (IAT) Level II certification. (Security+ CE, CCNA Security, CySA+, GICSP, GSEC, CND, SSCP)
• Experience administering Linux Operating systems, Networking/Switch, and Virtualized Machines
• Ability to create scripts to automate repetitive tasks on Linux.
• Experience implementing NIST 800-53 control families.
• Experience with core infrastructure services administration such as AD, DNS, DHCP, and File Server administration.
• Experienced in deploying Operating System images in a variety of mediums (PXE-network, disk image, automated installation media with answer scripts).
• Ability to collaborate within a team and independently with minimal supervision.
• Perform research necessary to resolve complex technical problems
• Administer Windows Operating systems
• Willing and able to travel international as required to support system installation and maintenance.
• Work will be performed on site in Huntsville, AL. Must be a resident of the North Alabama area or willing to relocate to the Huntsville – North Alabama, AL, area.

Preferred Qualifications

• System Administrator experience in a similar sized organization.
• Experienced in building and deploying DevSecOps systems.
• Experienced in deploying Multifactorial Authentication 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:

September 19, 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:

Pay Range $72,150.00 - $130,425.00

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.