Linux Systems Administrator (TS/SCI with CI Polygraph)
We are seeking a highly skilled Linux Systems Administrator to support secure, mission-critical environments. This role requires hands-on experience managing Linux systems, applying security controls, supporting hardware, and maintaining compliance with DoD and Intelligence Community standards.
Required Qualifications
- Active TS/SCI Security Clearance with CI Polygraph (required)
- CompTIA Security+ or equivalent DoD 8572-compliant certification (or ability to obtain within 60 days of hire)
- Strong experience with Linux or UNIX operating systems
- Ability to install and apply OS security patches and firmware updates
- Experience creating and managing user accounts, security groups, and permissions
- Coordinate and support hardware repair and replacement activities
- Diagnose, troubleshoot, and resolve hardware and software issues
- Develop scripts to automate system administration tasks
- Create, maintain, and update Standard Operating Instructions (SOIs) and system documentation
Preferred / Desired Skills
- Experience with Red Hat Enterprise Linux (RHEL) 6, 7, 8, and 9
- Administration of virtual machines using VMware ESXi
- Perform routine server and workstation patching in accordance with security and compliance guidelines
- Proficiency in automation and configuration management using Shell scripting and Ansible
- Experience installing and configuring servers, operating systems, and associated hardware
- Ability to install, configure, and support software applications and system utilities
- Experience managing systems in disconnected or air-gapped environments
- Strong background in vulnerability remediation and system security, including:
- System hardening
- Log management
- Configuration management
- Security tools such as Nessus, Trellix, Splunk, SCAP, and HBSS
- Experience implementing and managing backup and disaster recovery solutions for Linux systems
- Knowledge of NISPOM, Risk Management Framework (RMF), and Security Technical Implementation Guide (STIG) requirements
- Experience managing Linux systems with NAS/SAN attached storage, including storage troubleshooting
- Experience implementing and managing end-user authentication in mixed authentication environments
- NIS and SSSD experience preferred
- Previous exposure to Solaris, AIX, POWER, or SPARC platforms is a plus
