Linux Systems Administrator - TS/SCI with Polygraph

Public Trust: None

Requisition Type: Pipeline

Your Impact

Own your opportunity to serve as a critical component of our nation’s safety and security. Make an impact by using your expertise to protect our country from threats.

Job Description

LINUX SYSTEMS ADMINISTRATOR SME

YOUR IMPACT

Own your opportunity to support national defense. Your work will help keep critical operations secure and connected across the global enterprise directly, contributing to a mission that protects our nation every day.

CIS is growing, and we invite both our experienced incumbents and new team members to be part of what’s next. Incumbents bring invaluable mission insight, while new talent adds fresh ideas and energy. Together, we’ll strengthen continuity and drive the next generation of innovation.

MEANINGFUL WORK AND PERSONAL IMPACT

As a Linux Systems Administrator supporting CIS, you will ensure the stability, security, and performance of enterprise Linux systems within the server and compute environment. You will support system availability, execute operational maintenance, enable secure implementations, and contribute to the sustainment of mission critical infrastructure services. Your work directly strengthens resilience, consistency, and operational continuity across complex, and multinetwork environments. 

KEY RESPONSIBILITIES:

• Provide Tier 2 support for Linux/Unix servers, workstations, web services, and storage-connected systems: support Tier 3 functions through cross training with Engineering 
• Perform installations, upgrades, and configuration of Linux operating systems and layered software packages in alignment with policies, procedures, and SLAs 
• Support planning and execution of system upgrades, hardware refreshes, and software deployments across operational environments 
• Conduct routine system maintenance including patching, updates, system health checks, logging, and backups 
• Implement and maintain security measures to protect systems against vulnerabilities and unauthorized access 
• Conduct security audits, compliance checks, and assessments to ensure adherence to organizational policies and regulatory requirements 
• Develop, manage, and test backup and recovery procedures; maintain and support disaster recovery and business continuity plans 
• Collaborate with engineering teams to provide system performance data, capacity trends, and operational insights that inform system design, build, and configuration activities 
• Partner with stakeholders to understand requirements and recommend appropriate Linux-based solutions that optimize performance and resource utilization 
• Troubleshoot and resolve complex hardware, software, and system issues; provide user and technical team support as needed 
• Maintain detailed documentation on system configurations, procedures, operational changes, and infrastructure updates 
• Support development or refinement of IT policies, procedures, and operational standards as requested 

WHAT YOU’LL NEED TO SUCCEED :

• EDUCATION: Bachelor’s degree in an IT-related field, or 10-12+ years of relevant IT experience in lieu of a degree
• CERTFICATION: Meet DoD 8140 Information Assurance Workforce certification requirements (e.g. Security+ CE, etc.)
• CLEARANCE: Active TS/SCI clearance with a favorable polygraph
• Hands-on experience administering, maintaining, and troubleshooting enterprise Linux/Unix systems across multiple environments 
• Strong understanding of secure configuration, patching, user and service management, storage integrations, and system performance monitoring 
• Ability to resolve complex system, network, and service issues across distributed environments 
• Strong documentation, communication, and collaboration skills 

• US citizenship required

• LOCATION: Onsite

GDIT IS YOUR PLACE
At GDIT, the mission is our purpose, and our people are at the center of everything we do.
Growth: AI-powered career tool that identifies career steps and learning opportunities
Support: An internal mobility team focused on helping you achieve your career goals
Rewards: Comprehensive benefits and wellness packages, 401K with company match, and competitive pay and paid time off
Community: Award-winning culture of innovation and a military-friendly workplace

OWN YOUR OPPORTUNITY
Explore an enterprise IT career at GDIT and you’ll find endless opportunities to grow alongside colleagues who share your desire to drive operations forward.

#CIS

Work Requirements

Years of Experience

10 + years of related experience

* may vary based on technical training, certification(s), or degree

Certification

Travel Required

None

Citizenship

U.S. Citizenship Required