Intermediate Linux System Administrator - Infrastructure/Touch Labor

Leidos is a FORTUNE 500 company bringing a mix of innovative technology and sector expertise to customers in the national security, engineering, and the health industries. Leidos is seeking an Intermediate Linux System Administrator for a position as part of a team supporting the Defense Information Security Agency (DISA) in Columbus, OH. This is an onsite position, no full-time telework allowed.

Primary Responsibilities:

• Provide on-site touch labor in a data center environment.
• Manage, configure, and optimize Linux servers (Ubuntu, CentOS, RHEL, etc.)
• Validate current security posture and perform system configuration changes, as required or as directed by higher authority, to improve enterprise security
• Security Content Automation Protocol (SCAP) tool and Security Technical Information Guides (STIGs) to maintain required infrastructure security levels and system hardening
• Perform routine system maintenance, updates, and patch management
• Troubleshoot server-related issues and provide timely resolution
• Monitor system performance and ensure high availability and uptime
• Implement security best practices, including firewall configurations and access controls
• Automate tasks using scripting and configuration management tools (Ansible, Puppet, etc.)
• Manage storage solutions, backup strategies, and disaster recovery plans
• Collaborate with other IT teams to support applications and services
• Maintain documentation for system configurations, procedures, and troubleshooting guides
• Support temporarily, Service Response, continuity of operations support as needed.
• Conduct technical analysis and provides documentation (Standard Operating Procedures (SOPs), troubleshooting and monitoring, technical reports, etc.) for root cause analysis, technical assessment and process improvement initiatives.

Basic Qualifications:

• Requires BS and 4+ years of prior relevant experience or Masters with 2+ years of prior relevant experience, additional years of experience will be accepted in lieu of a degree.
• Must have an active Secret clearance and pass a drug test.
• Must have a DoD 8570 IAT Level II approved certification (CompTIA Security+)
• 3-5 years of hands-on experience supporting, implementing, and maintaining Linux-based infrastructure in a production environment. Relevant experience may be considered in lieu of a formal degree.
• Solid understanding of server architecture and datacenter operations, including system provisioning, monitoring, and maintenance.
• Familiarity with core network services (e.g., DNS, DHCP, NTP) and their integration within Linux environments.
• Experience with one or more security compliance frameworks or tools such as Security Content Automation Protocol (SCAP), Security Technical Implementation Guides (STIGs), and Information Assurance Vulnerability Management (IAVMs).
• Foundational knowledge of cryptographic principles, including symmetric and asymmetric encryption, secure hashing algorithms, and digital signatures.
• Strong interpersonal skills with the ability to communicate effectively and build collaborative relationships across teams.
• Highly proactive and dependable with exceptional attention to detail and strong organizational skills.
• Proven analytical and troubleshooting abilities, particularly in diagnosing and resolving complex technical issues in Linux systems.

Preferred Qualifications:

• Minimum of 1 year experience with scripting and automation
• Experience with certificate-enabled applications such as SSL/TLS, S/MIME, authentication, Encrypted File System, Code Signing, etc.
• Experience with AWS cloud services and environments.
• Ability to install and configure software, firmware, upgrades and security updates/patches to maintain and secure operating systems and associated hardware
• Identify and correct inefficiencies and implement optimizations to improve existing Windows and Citrix infrastructures, as needed.

Original Posting:
May 1, 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.