Linux System Administrator with Security Clearance

CDIT is a technology solutions company supporting government and national security customers with secure, mission-focused IT solutions. We partner with highly skilled technical professionals to support complex environments where reliability, security, and operational excellence are critical. Our team values technical expertise, collaboration, and a commitment to supporting the missions of our customers. CDIT is seeking an experienced Linux System Administrator to support a secure, mission-critical enterprise environment.

This role will be responsible for the administration, maintenance, performance, and security of Linux-based infrastructure, with a focus on IBM Enterprise Storage, Veritas NetBackup, vulnerability management, system patching, and security compliance. The ideal candidate will bring strong hands-on Linux administration experience with the ability to troubleshoot complex infrastructure issues, optimize system performance, and support highly available environments.

Responsibilities • Administer, maintain, and optimize Linux-based systems in a production environment. • Manage and support IBM Enterprise Storage solutions, ensuring availability and performance. • Configure, monitor, and troubleshoot Veritas NetBackup for enterprise backup and recovery operations. • Perform system patching and package management using YUM repositories. • Execute and remediate vulnerability scans using Nessus, ensuring compliance with applicable security standards. • Support and maintain STE/STIN processes and environments. • Implement and maintain system security configurations, including applicable NSF frameworks and policies. • Perform routine system health checks and optimize performance, availability, access controls, and security. • Support system optimization, performance tuning, and capacity planning. • Proactively identify and troubleshoot potential system issues, risks, and operational roadblocks. • Collaborate with infrastructure, security, and technical teams on system upgrades, audits, incident response, and operational requirements. • Maintain system configurations, procedures, and compliance documentation.

Requirements Required Skills & Qualifications • 3+ years of hands-on Linux System Administration experience with RHEL, CentOS, or similar. • Experience with IBM Enterprise Storage systems. • Strong knowledge of Veritas NetBackup administration. • Experience with Nessus vulnerability scanning and remediation. • Proficiency with YUM package management and system patching. • Familiarity with STE/STIN processes and NSF-related security frameworks. • Strong understanding of Linux security, system hardening, and compliance. • Strong troubleshooting and scripting skills using Bash, Python, or similar. • Active Top Secret clearance with Lifestyle Polygraph (LS Poly). • Bachelorx27s degree in Computer Science, Information Technology, or a related field, or equivalent professional experience.

Preferred Skills & Qualifications • Red Hat Certified System Administrator (RHCSA) or equivalent Linux certification. • Experience supporting enterprise environments with high availability and disaster recovery requirements. • Experience with automation tools such as Ansible or Puppet. • Exposure to cloud or hybrid infrastructure environments. • Experience with system performance tuning and capacity planning. • Experience supporting secure or classified enterprise environments.