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Expert Windows/Linux Systems Administrator (TS/SCI with Poly Required)
GCI, INCReston
Expert Windows/Linux Systems Administrator (TS/SCI with Poly Required) Job Category: Systems AdministrationRequisition Number: EXPER001982Posted: March 9, 2026Full-TimeOn-siteSalary Range: $142,792 US
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Expert Windows/Linux Systems Administrator (TS/SCI with Poly Required)
- Reston, Virginia, United States
- Reston, Virginia, United States
Über
Requisition Number: EXPER001982
Posted: March 9, 2026
Full-Time
On-site
Salary Range: $142,792 USD to $238,451.20 USD
Locations Showing 1 location
Virginia, USA
Description GCI embodies excellence, integrity and professionalism. The employees supporting our customers deliver unique, high-value mission solutions while effectively leveraging the technological expertise of our valued workforce to meet critical mission requirements in the areas of Data Analytics and Software Development, Engineering, Targeting and Analysis, Operations, Training, and Cyber Operations. We maximize opportunities for success by building and maintaining trusted and reliable partnerships with our customers and industry.
At GCI, we solve the hard problems. As a Systems Administrator Expert, a typical day will include the following duties:
The candidate will be accountable for Windows system administration to include some Linux, application-based system services and developer-based applications that support the infrastructure. Responsibilities on these systems include SA engineering, operations and maintenance, troubleshooting, configurations, installation, and research and development to ensure continual and optimal operation. The position requires general technical knowledge of systems, networks, and application security as well as an understanding of operational-level security frameworks, policies, processes, and standards. The candidate must have strong analytical skills for troubleshooting complex issues, attention to detail, and the ability to multitask in a fast-paced environment.
Key Responsibilities
Maintain Windows operating systems, application support, integration, design, and assistance as needed with additional duties to support the team
Schedule and install Windows security patching, file and server backups, maintain group policies, troubleshoot server issues, and manage server installs (rack, configure, security harden, maintain)
Schedule, plan and perform system upgrades
Maintain, plan and monitor the back-end infrastructure
Support cyber security engineer performing security analysis of audit logs and other artifacts of a networked computer system
Required Qualifications
Demonstrated experience with Microsoft Windows Server and Active Directory administration
Demonstrated experience with Hypervisor technologies (Hyper-V, KVM, VMware, etc.)
Demonstrated experience installing and configuring systems which support infrastructure and/or R&D activities
Demonstrated experience with installing and updating patches on the operational and development systems, and documenting compliance
Demonstrated experience collaborating with other systems administrators, security analysts, and network engineers to solve complex problems
Experience in leveraging scripting and system automation tools (PowerShell, BASH, etc.)
Demonstrated experience in performing and maintaining system backups
Experience performing with minimal guidance under pressure and tight deadlines
Excellent communication skills (written, verbal and face‑to‑face)
Desired Skills
Experience with PKI and Windows Certificate Authority administration
Experience with Linux distributions (Rocky, Ubuntu, etc.)
Experience in applying cyber security practices in real‑world environments
Experience working with log analytic tools such as Splunk, Rapid 7
IT and security certifications
Familiar with Atlassian suite of tools
Knowledge of cloud technologies, provisioning and security
Location: Reston, VA
A candidate must be a US Citizen and requires an active/current TS/SCI with Polygraph clearance.
Equal Opportunity Employer / Individuals with Disabilities / Protected Veterans
Preferred Bachelor of Science or better in Information Technology or related field.
Experience 10 years: Related work experience.
Equal Opportunity Employer
This employer is required to notify all applicants of their rights pursuant to federal employment laws. For further information, please review the Know Your Rights notice from the Department of Labor.
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Sprachkenntnisse
- English
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