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

Job Category: IT Infrastructure and Operations Requisition Number: SYSTE002210 Posting Details * Posted: July 9, 2026
* Full-Time
* On-site
* Salary Range: $164,382.40 USD to $274,518.40 USD 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 SME Systems Engineer, a typical day will include the following duties/skills: Required Skills: * Demonstrate an in-depth understanding of Linux/Unix operating system maintenance and support and foundational AWS cloud exposure.
* Demonstrate on the job experience upgrading, monitoring, troubleshooting and implementing both on premise and cloud technologies.
* Core Hours: 10-3
* Pager duty may be required.
* Support and troubleshoot web applications, this includes deployment of Tomcat applications using AWS and utilizing application and server logs to identify and resolve issues.
* Demonstrated experience and support for applications hosted in an AWS cloud environment, including deployments, patches, security checks, and maintenance.
* Upgrade and maintain operating systems and application software on LINUX (Linux (RHEL, CentOS, Scientific Linux).
* Perform software installations and patching support.
* Daily monitoring of the network, servers, cloud and applications to ensure full availability and optimum performance. Utilize software tools and logs to monitor network and system health.
* Track and manage system certificates, privileged accounts, and database passwords.
* Create and update documentation, including standard operating procedures, administrative instructions, After Action Reports for system outages, task status updates, and customer reports.
* Support for system and data security requirements, and documented system artifacts required for security certification.
* Experience with implementing and maintaining encryption technology (PKI authentication, Vormetric, and KMS).
* Demonstrated experience with web services.
Desired Skills & Experience: * Experience with building AWS infrastructure or migrating private on-premise solutions to cloud hosting environments.
* Firm Relational Database understanding (Oracle, MySQL).
* Working knowledge of CloudFormation, Terraform and Ansible.
* Experience with scripting languages (Shell, Perl, and Python).
* Experience with SysOps/DevOps.
* Ability to perform cloud performance analysis and optimize distributed cloud systems.
 
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 BA/BS or better. Experience Preferred 15 years:
Demonstrated related work experience. Licenses & Certifications Equal Opportunity Employer