Systems Administrator

Leidos LLC; Columbia (MD); On-site; USD 73,000 - 133,000; Full time

Benefits offered by this job

Paid time off

11 paid holidays

401(k) with company match

Flexible schedules

Discounted stock purchase plans

Technical upskilling

Education and training support

Parental paid leave

Sign-on bonus

Job summary

Leidos LLC is seeking a Systems Administrator to support Linux‑based infrastructure across development, test, and production. The role emphasizes hands‑on Linux administration, security hardening, automation, and collaboration with cross‑functional teams in a mission‑critical environment.

Qualified candidates will have extensive Linux experience, AWS proficiency, and an active TS/SCI clearance with polygraph. This position offers competitive benefits and a sign‑on bonus.

Qualifications

• Bachelor's degree in a technical discipline with 5 years of related experience; or 5 additional years in lieu of a degree.
• Extensive hands-on Linux systems administration in RHEL or equivalent environments.
• Automation/configuration management using Ansible, Bash, Python or similar.
• Experience with AWS services (EC2, ECS, EKS, SSM, CloudFormation).
• Active TS/SCI clearance with polygraph.

Responsibilities

• Administer, configure, secure, monitor, and troubleshoot Linux systems across Development, Test, and Production environments.
• Lead root-cause analysis across OS, applications, storage, authentication, performance, and networking issues.
• Manage lifecycle activities: accounts, permissions, patching, packaging, services, upgrades.
• Implement Linux security controls, hardening, and vulnerability remediation; ensure compliance baselines.
• Develop automation using Ansible, Bash, and Python to improve consistency and efficiency.
• Collaborate with SAs/DBAs/SWEs/SEs and document configurations and runbooks.

Skills

Linux administration

AWS experience

Automation with Ansible

Python/Bash scripting

Troubleshooting

Security clearance TS/SCI

Education

Bachelor's degree in a technical discipline

Tools

Ansible

Bash

Python

Linux command line

Job description

Leidos has a new and exciting opportunity for a Systems Administrator in our Intelligence Sector, Cyber & Analytics Business Area (CABA). 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! This position is eligible for a $10k sign on bonus!

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 (Five) 5 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.
• Experience with AWS, including EC2, ECS (Elastic Container Service), EKS (Elastic Kubernetes Service), Systems Manager (SSM), CloudFormation, and associated monitoring and operational services.
• Security Clearance Requirement: 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.

CONMD CSSRC

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.

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 here.

Securing Your Data

Leidos will never ask you to provide payment‑related information at any part of the employment application process. And Leidos will communicate with you only through emails that are sent from a Leidos.com email address. If you receive an email purporting to be from Leidos that asks for payment‑related information or any other personal information, please report the email to [e-mail].

Commitment and Diversity

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.

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 $17.2 billion for the fiscal year ended January 2, 2026.

For more information, visit www.Leidos.com.

Pay Range

Pay Range $73,450.00 - $132,775.00 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 includes (but is 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.