Linux Systems Administrator - TS/SCI with Polygraph

Req ID: RQ219423

Type of Requisition: Regular

Clearance Level Must Be Able to Obtain: Top Secret SCI + Polygraph

Public Trust/Other Required: None

Job Family: IT Infrastructure and Operations

Skills:

Hardware Refresh,IT Installations,Linux,System Performance Monitoring,Unix Operating Systems

Experience:

10 + years of related experience

US Citizenship Required:

Yes

Job Description:

LINUX SYSTEMS ADMINISTRATOR

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.

CIO Infrastructure Services (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 6+ 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

The likely salary range for this position is $111,155 - $150,385. This is not, however, a guarantee of compensation or salary. Rather, salary will be set based on experience, geographic location and possibly contractual requirements and could fall outside of this range.

Our benefits package for all US-based employees includes a variety of medical plan options, some with Health Savings Accounts, dental plan options, a vision plan, and a 401(k) plan offering the ability to contribute both pre and post-tax dollars up to the IRS annual limits and receive a company match. To encourage work/life balance, GDIT offers employees full flex work weeks where possible and a variety of paid time off plans, including vacation, sick and personal time, holidays, paid parental, military, bereavement and jury duty leave. To ensure our employees are able to protect their income, other offerings such as short and long-term disability benefits, life, accidental death and dismemberment, personal accident, critical illness and business travel and accident insurance are provided or available. We regularly review our Total Rewards package to ensure our offerings are competitive and reflect what our employees have told us they value most.

We are GDIT. A global technology and professional services company that delivers consulting, technology and mission services to every major agency across the U.S. government, defense and intelligence community. Our 26,000 experts extract the power of technology to create immediate value and deliver solutions at the edge of innovation. We operate across 50 countries worldwide, offering leading capabilities in digital modernization, AI/ML, Cloud, Cyber and application development. Together with our clients, we strive to create a safer, smarter world by harnessing the power of deep expertise and advanced technology.

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Equal Opportunity Employer / Individuals with Disabilities / Protected Veterans