Linux System Administrator

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.