TS/SCI Linux Systems Administrator for Mission-Critical HPC

Cyber Security Jobs; Suitland, Northern (MD, KY); Hybrid; USD 92,000 - 167,000; Full time

Job summary

Leidos is seeking an experienced Linux Systems Administrator to support mission-critical S&T systems at the ONI in Suitland, MD. You will provide advanced Linux, cybersecurity, and enterprise infrastructure support within a classified environment to enable engineering analysis, modeling, and high-performance computing.

Responsibilities include Linux administration, system monitoring, patching and hardening, IAVA remediation, VMware support, and NetApp storage management.

Qualifications

• Bachelor's degree with 8+ years of experience, or Master's with 6+ years.
• Active TS/SCI clearance (in DISS).
• Active DoD 8570 IAT Level III certification (e.g. CASP, CISSP, GCIH) or higher or within 30 days of offer.
• Current Red Hat Certification (RHCA preferred) or ability to obtain within 30 days of offer.
• Strong enterprise Linux administration and troubleshooting expertise.
• Experience with VMware, storage systems, secure transport protocols, and security configuration.
• Excellent communication, problem-solving, and customer support skills.

Responsibilities

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

Skills

Linux administration

VMware

STIG hardening

IAVA/IAVB remediation

HBSS / ACAS

NetApp storage

Firewall & IDS/IPS

Communication skills

Education

Bachelor's degree + 8+ years

Master's degree + 6+ years

Tools

NetApp storage

Job description

Leidos is seeking an experienced Linux Systems Administrator to support mission-critical S&T systems at the ONI in Suitland, MD. You will provide advanced Linux, cybersecurity, and enterprise infrastructure support within a classified environment to enable engineering analysis, modeling, and high-performance computing.

Responsibilities include Linux administration, system monitoring, patching and hardening, IAVA remediation, VMware support, and NetApp storage management.