Leidos is seeking an experienced System Administrator to support autonomous maritime projects’ hardware stacks by managing and maintaining Linux-based systems in an on-premises system integration lab (SIL) in Arlington, VA. The System Administrator will be joining an existing team which has already successfully delivered for our customers and plan to continue their reputation of excellence. The System Administrator will focus on system configuration, monitoring, troubleshooting, and ensuring the security and integrity of Linux servers and workstations with little supervision. The team’s focus is on software and supporting hardware, including integration with hardware and sensors on multiple vessels. The system administrator will work closely with cross-functional teams to support system deployments, software updates, and operational readiness, ensuring that all systems meet security, performance, and availability requirements. 

This position is on-site in support of the system integration lab (SIL) in Arlington, VA.  After hours support may be required to keep the lab functioning (if needed).

Primary Responsibilities

• Ensure the reliability, security, and efficiency of our servers, networks, and system integration laboratories.
• Perform system monitoring, performance tuning, and troubleshooting to ensure high availability and reliability. 
• Manage system patches, upgrades, and security hardening in compliance with DoD policies. 
• Provide support for system backups, disaster recovery, and data integrity. 
• Configure and maintain network services including routing, firewalls, DNS, and VLANS.
• Assist in managing system access, user accounts, and security configurations. 
• Collaborate with teams to support software deployments and integration. 
• Create and maintain documentation pertaining to system operating procedures. 
• Participate in incident response and resolve issues related to system performance, security, and availability. 

Basic Qualifications

• US Citizen with an active SECRET clearance.
• 4+ years of prior relevant experience or Masters with 2 – 6 years of prior relevant experience in being a System Administrator (or experience in a similar field)
• Bachelor’s degree in fields like Computer Science, Information Technology, Network Engineering, etc.
• Experience with system security, patch management, and performance tuning. 
• Proficiency in scripting languages (e.g., Bash, Python). 
• Experience with configuration management tools (e.g., Ansible). 
• Familiarity with virtualization technologies (e.g., Docker, Kubernetes, VMware, KVM). 
• Ability to set up new servers as needed and support hardware upgrades.
• Ability to apply user requirements to the analysis, planning, and design of technology systems.
• Ability to communicate problems and solutions both verbally and in writing.
• Ability to work independently and troubleshoot problems with speed and efficiency.
• Ability to work closely with others in a team environment.
• Strong analytical and problem-solving skills.

Preferred Qualifications

Familiarity with one or more disciplines:

• Linux certifications (e.g., RHCSA, RHCE, CompTIA Linux+). 
• Experience with monitoring tools (e.g., Nagios, Zabbix, Prometheus). 
• Experience with RHEL 8/9/10.
• Knowledge of Dell Servers

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:

February 2, 2026

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 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.