Senior Linux Systems Administrator

Leidos

Annapolis Junction, Maryland

JOB DETAILS
SKILLS
Analysis Skills, Automation, Cloud Computing, CompTIA Security+, Computer Networks, Computer Operations, Computer Security, Cryptography, Firewalls, IAT - Information Assurance Technical, IP (Internet Protocol), Identify Issues, Legal, Linux Administration, Linux Operating System, Network Administration/Management, Public Key Infrastructure (PKI), SSCP - Systems Security Certified Practitioner, SSL-TLS (Secure Socket Layer - Transport Layer Security), Security Compliance, Sensitive Compartmented Information (SCI), Signal Intelligence (SIGINT), Software Administration, Technical Support, Top Secret Clearance, Virtualization, Web Analytics
LOCATION
Annapolis Junction, Maryland
POSTED
30+ days ago

Leidos has a new and exciting opportunity for a Senior Linux Systems Administrator in our Intelligence Sector’s, 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:

Leidos is seeking a highly experienced Linux-focused technical professional to support systems across cloud and on-prem environments. This role requires deep expertise in Linux administration, along with experience in infrastructure, security compliance, and troubleshooting within containerized and virtualized environments.

Primary Responsibilities

  • Administer and maintain Linux-based systems across cloud and containerized environments
  • Manage and support storage solutions and virtualization technologies
  • Configure and troubleshoot IP networking and firewall components
  • Apply and support PKI/TLS/cryptographic solutions, including adherence to crypto policies
  • Perform application support and advanced system troubleshooting within Linux environments
  • Support SSP compliance activities and STE/STN requirements on Linux systems
  • Contribute to system automation efforts using available tools (as applicable)

Basic Qualifications

  • Bachelor’s degree in a relevant field with 10+ years of experience, OR no degree with 15+ years of related professional experience
  • IAT Level II certification (e.g., Security+ CE, SSCP)
  • Strong proficiency in Linux system administration (required)
  • Experience with IP networking and firewall technologies
  • Solid understanding of PKI/TLS/cryptography and associated policies​
  • Clearance Required:  Must have an active TS/SCI with Polygraph

This position is eligible for a 10k Sign on Bonus

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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:

April 15, 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 $92,300.00 - $166,850.00

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 the Company

L

Leidos

Everything we do is built on our commitment to do the right thing for our customers, our employees, and our communities. Learn more about the values and culture that are the foundations of our business.
COMPANY SIZE
10,000 employees or more
INDUSTRY
Engineering Services
FOUNDED
1969
WEBSITE
http://leidos.com/