Principal Linux Infrastructure Engineer Security Clearance

Position: Principal Linux Infrastructure Engineer with Security Clearance
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- Description Leidos has an exciting opportunity for a Principal Linux Infrastructure Engineer in our Intel Security Sector's Analysis Solutions Business Area.  Our talented team is at the forefront in Security Engineering, Computer Network Operations (CNO), Mission Software, Analytical Methods and Modeling, Signals Intelligence (SIGINT), and Cryptographic Key Management. At Leidos, we offer competitive benefits, including Paid Time Off, 11 paid Holidays, 401K with a 6% company match and immediate vesting, Flexible Schedules, Discounted Stock Purchase Plans, Technical Upskilling, Education and Training Support, Parental Paid Leave, and much more.  

Join us and make a difference in National Security!

Job Summary This Linux Infrastructure Engineer provides IT infrastructure engineering, administration, and operations support. This role maintains enterprise server infrastructure to ensure proper configuration, availability, performance, capacity, and maintenance (including application of the latest patches and upgrades). This role monitors technology obsolescence, manages upgrades, and evaluates alternatives across on-premises and cloud IT infrastructures, both virtual and physical. This role monitors operations and collects and evaluates metrics to manage IT infrastructure services and for inclusion into project KPIs and Service Level Agreements (SLA).

This individual performs risk assessment, risk mitigation analysis, vendor trade studies, and appropriate documentation to ensure IT infrastructure services are available according to established Service Level Agreements (SLA). This role ensures continuity of operations including disaster recovery.

Primary Responsibilities:

* This role is responsible for installation, configuration, administration, support, and maintenance of systems, including associated hardware and cloud resources.
* Duties include updating to new technologies, tuning performance, defining storage needs, and prioritizing the implementation of critical system patches.

* This infrastructure includes on-premises and cloud resources.
* Security Mitigations

Basic Qualifications:

* Experience with best practices for securing Linux server environments
* Experience supporting a broad range of assignments requiring originality and innovation in determining how to accomplish tasks.
* Experience developing methodologies and presenting solutions to problems.
* Experience contributing to deliverables and meeting performance metrics.
* Experience with automation tools
* Familiar with basic shell scripting
* Experience with installing, updating, and removing software packages on Linux systems
* Must be available for on-call support
* Candidate must have a Bachelor’s degree with 12 or more years of prior relevant experience. Additional years of experience may be substituted in lieu of a degree.
* To be considered, candidate must have an active TS/SCI with a polygraph CABARESTON 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:
January 23, 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 $ - $ 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…