Independent Software

System Administrator, Level 3

System Administration - Annapolis Junction, MD - Full Time

What You Will Do:

As a Senior Systems Administrator, you will be responsible for supporting the implementation, troubleshooting, and maintenance of mission-critical IT systems. You’ll manage and monitor infrastructure components including servers, storage, and networks, while ensuring system integrity, performance, and compliance. Your work will span Tier 1 help desk through Tier 2 escalation, with responsibilities that include Linux/Windows administration, shell scripting, vulnerability remediation, and automation with Ansible.

This position offers the chance to work at the heart of secure and resilient enterprise systems that support national defense and intelligence operations. You’ll have hands-on access to modern tools like Ansible, GIT, Nessus, and SecurityCenter, and be part of a high-performing team solving complex technical challenges. If you enjoy variety, autonomy, and mission-focused work, this role is ideal for you.

Key Responsibilities:

  • Provide Tier 1 and Tier 2 support for troubleshooting and maintaining IT systems.
  • Install, configure, and maintain Linux (CentOS/RHEL) and Windows operating systems.
  • Perform system patching using YUM, vulnerability remediation, and IAVA compliance reporting.
  • Support PKI (e.g., issuing, renewing, and revoking certificates).
  • Monitor infrastructure using Nagios; analyze performance issues across systems.
  • Use tools such as SecurityCenter, Nessus, Trellis Agent, ENSL, and UAM to support cyber hygiene and monitoring.
  • Write and maintain shell scripts and Ansible playbooks for system automation and configuration.
  • Perform VM lifecycle tasks: building, configuring, and troubleshooting.
  • Manage GIT repositories, handle branching/tagging, and support code/configuration tracking.
  • Create and maintain technical documentation and SOPs in Confluence.
  • Interface with users and agency stakeholders to escalate and resolve system issues.
  • Support service dispatch requests and remain involved in hardware troubleshooting through resolution.
  • Provide input on capacity planning, performance optimization, and SOA integration.
Required Skills and Qualifications:
  • Strong knowledge of Linux system administration, particularly RHEL/CentOS.
  • Experience with virtual machines, storage, performance tuning, and system monitoring.
  • Working knowledge of shell scripting, Ansible, Git, and automated patching.
  • Experience reading vulnerability reports and implementing compliance solutions.
  • Familiarity with Biscotti, LatteArt, and STE toolsets (e.g., Nessus, UAM, Trellis).
  • Strong diagnostic and problem-resolution skills.
  • Ability to communicate technical issues effectively to management and end users.
  • Skilled at documenting procedures and workflows.

Education and Experience:
  • Bachelor’s degree in a technical discipline from an accredited college or university + 15 years of systems administration experience.
  • In lieu of a degree, five (5) additional years of SA experience may be substituted.

Certifications:
  • DoD 8570 IAT Level I or higher (e.g., Security+ CE) is required.

Clearance Requirement:
  • Must possess an active TS/SCI with Polygraph security clearance to be considered for this role.

Independent Software is an Equal Opportunity Employer EOE, M/F/D/V

Apply: System Administrator, Level 3
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