Senior Linux Systems Administrator – TS/SCI, Mission-Critical

Leidos Inc; Suitland (MD); On-site; USD 92,000 - 167,000; Full time

Benefits offered by this job

Health and Wellness programs

Income Protection

Paid Leave and Retirement

Job summary

Leidos is actively seeking a Linux Systems Administrator to support mission-critical ONI systems in Suitland, MD. The role focuses on advanced Linux administration, cybersecurity, and enterprise infrastructure within a classified environment to enable engineering analysis and high-performance computing.

Required qualifications include a TS/SCI clearance, DoD 8570 IAT Level III or higher (or ability to obtain within 30 days), and RHCA preferred or obtainable within 30 days.

Qualifications

• Bachelor's degree with 8+ years or Master's with 6+ years; additional experience may substitute for a degree.
• Active TS/SCI clearance (DISS).
• Active DoD 8570 IAT Level III certification or higher or able to obtain within 30 days.
• Current Red Hat Certification (RHCA preferred) or able to obtain within 30 days.
• Strong enterprise Linux administration and troubleshooting expertise.
• Experience with VMware, storage systems, secure transport protocols, and security configuration.
• Excellent communication and customer support skills.

Responsibilities

• Administer and optimize Linux server environments (RHEL & RPM-based).
• Monitoring, patching, STIG hardening, and performance tuning.
• IAVA/IAVB implementation and vulnerability remediation.
• Support VMware, NAS/NFS/CIFS, automation tools, and cluster services.
• Maintain HBSS, ACAS, Trellix, and other security tools.
• Manage firewall rules, IDS/IPS configurations, and endpoint protection.
• Troubleshoot NetApp storage systems.
• Collaborate with crossfunctional engineering, cyber, and operations teams.

Skills

Linux admin

VMware

Security tools

Troubleshooting

Communication

Education

Bachelor's degree

Master's degree

Tools

RHCA

DoD 8570 IAT Level III

Job description

Leidos is actively seeking a Linux Systems Administrator to support mission-critical ONI systems in Suitland, MD. The role focuses on advanced Linux administration, cybersecurity, and enterprise infrastructure within a classified environment to enable engineering analysis and high-performance computing.

Required qualifications include a TS/SCI clearance, DoD 8570 IAT Level III or higher (or ability to obtain within 30 days), and RHCA preferred or obtainable within 30 days.