Linux System Administrator

CDIT; Maryland; On-site; USD 90,000 - 120,000; Full time

Job summary

CDIT is seeking a skilled Linux System Administrator to join our IT infrastructure team in Annapolis Junction, Maryland. The role requires strong experience managing enterprise Linux environments, as well as expertise with IBM Enterprise Storage and Veritas NetBackup.

The ideal candidate will possess a Bachelor’s degree in Computer Science or a related field, 3+ years of Linux administration, and a Top Secret Clearance with LS Poly. This position offers a vital role in maintaining system integrity and security within our high-performance infrastructure.

Qualifications

• 3+ years of hands-on Linux system administration experience (RHEL, CentOS, or similar).
• Strong knowledge of Veritas NetBackup (NetBackup Administration).
• Top Secret Clearance with LS Poly.

Responsibilities

• Administer, maintain, and optimize Linux-based systems in a production environment.
• Configure, monitor, and troubleshoot Veritas NetBackup for enterprise backup and recovery operations.
• Monitor system performance, troubleshoot issues, and implement proactive improvements.

Skills

Storage & Backup Management

Security & Compliance

System Monitoring & Performance Tuning

Automation & Scripting

Education

Bachelor’s degree in Computer Science, Information Technology, or related field

Tools

IBM Enterprise Storage

Veritas NetBackup

Nessus

YUM

Job description

Overview

Annapolis Junction, United States | Posted on 05/08/2026

We are seeking a skilled and detail-oriented Linux System Administrator to join our IT infrastructure team. The ideal candidate will have strong experience managing enterprise Linux environments and supporting storage, backup, security, and patching systems. This role requires hands-on expertise with IBM Enterprise Storage, Veritas NetBackup, and vulnerability management tools, along with a solid understanding of system hardening and package management.

Key Responsibilities

• Administer, maintain, and optimize Linux-based systems in a production environment
• Manage and support IBM Enterprise Storage solutions, ensuring high 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 security standards
• Support and maintain STE/STIN processes and environments (as applicable to organizational standards)
• Implement and maintain system security configurations, including NSF frameworks/policies
• Monitor system performance, troubleshoot issues, and implement proactive improvements
• Collaborate with cross-functional teams for infrastructure upgrades, audits, and incident response
• Maintain documentation for system configurations, procedures, and compliance requirements

Required Qualifications

• Bachelor’s degree in Computer Science, Information Technology, or related field (or equivalent experience)
• 3+ years of hands-on Linux system administration experience (RHEL, CentOS, or similar)
• Experience with IBM Enterprise Storage systems
• Strong knowledge of Veritas NetBackup (NetBackup Administration)
• Experience with Nessus vulnerability scanning and remediation workflows
• Proficiency with YUM package management and patching strategies
• Familiarity with STE/STIN processes and NSF-related security frameworks
• Solid understanding of Linux security, system hardening, and compliance practices
• Strong troubleshooting and scripting skills (Bash, Python, or similar)
• Top Secret Clearance with LS Poly

Preferred Qualifications

• Red Hat Certified System Administrator (RHCSA) or equivalent certification
• Experience in enterprise environments with high availability and disaster recovery requirements
• Familiarity with automation tools (Ansible, Puppet, or similar)
• Exposure to cloud or hybrid infrastructure environments

Key Skills

• Storage & Backup Management
• Security & Compliance
• System Monitoring & Performance Tuning
• Automation & Scripting