Systems Engineer (TS/SCI with Poly Required) with Security Clearance

Job Category: IT Infrastructure and Operations Requisition Number: SYSTE002300 Posting Details *

• Posted: September 15, 2026
• Full-Time
• On-site
• Salary Range:

$142,792 USD to
$238,451.20 USD

• Locations Showing 1 location Chantilly Chantilly, VA, USA Chantilly Chantilly, VA, USA +0 more locations less locations Job Details Description GCI embodies excellence, integrity and professionalism. The employees supporting our customers deliver unique, high-value mission solutions while effectively leverage 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 Engineer, a typical day will include the following duties: JOB DESCRIPTION: The Systems Engineer/Administrator will be responsible for designing, implementing, and testing technical solutions for complex problems, including customer-facing hosted and cloud environments. They will provide expert technical assistance to team members with high-level system administration knowledge. The candidate will be responsible for ensuring that technical solutions leverage industry best practices, designing for security and excellence while minimizing the total cost of ownership.  Candidate should be able to define internal customer IT infrastructure architecture needs and then design solutions to meet those needs to include:  capacity planning, systems configuration and tuning, monitoring backups, and installations of hardware and software.  They will also secure and manage infrastructures to protect productivity, mitigate threats, and reduce costs. KEY RESPONSIBILITIES
• Perform system assessments and security audits
• Participate in the administration and maintenance of the remote monitoring and management system: update agent scripts, respond to alerts, monitor dashboard, and periodic system review
• Work with infrastructure engineers to identify new products and solutions
• Document maintenance for all computer systems and network infrastructure
• Communication with customers is required: keeping them informed of incident progress, notifying them of impending changes or agreed outages
• Familiarity with: VPNs, SIP Trunking, BGP, VLAN, Deployments
• Partner with application developers to solve complex problems
• Work with vendors and suppliers to negotiate, procure, and implement high-performing solutions EDUCATION AND EXPERIENCE
• Bachelor’s Degree in Computer Science or a related technical discipline, or the equivalent combination of education, technical training, or work/military experience
• 1-5 years of related systems administration experience
• Experience installing/configuring/maintaining systems running Windows and Linux operating systems REQUIRED QUALIFICATIONS
• Scripting experience (Python, Powershell, VBscript, Bash, etc)
• Experience with VM management
• Experience with Cisco devices
• Ability to take ambiguous requirements or problems and convert them into technical solutions DESIRED QUALIFICATIONS
• Experience with WAN and LAN connectivity, routers, firewalls, and security practices
• Remote monitoring and management of system alerts and notifications
• Experience with virtualization technologies: VMware, AWS, etc.
• Experience with configuration management tools: WSUS, MCM, Ansible, Puppet, Chef, etc.
• 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 Qualifications Skills Behaviors : Motivations : Education Preferred Bachelor of Science or better in Computer Science or related field. Experience Required 1-5 years: Related systems administration experience Preferred 10 years: Demonstrated work related experience. Licenses & Certifications 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. You are using an unsupported browser. To use this site, please use a supported browser. Download Firefox Download Chrome Download Internet Explorer