Systems Engineer SME; TS​/SCI Poly Security Clearance

Position: Systems Engineer SME (TS/SCI with Poly Required) with Security Clearance
Job Category: IT Infrastructure and Operations

Requisition Number: SYSTE
002133 Posting Details
* Posted:
June 2, 2026

* Full-Time

* On-site

* Salary Range: $ USD to $ 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 Systems Engineer, a typical day will include the following duties: WORK REQUIREMENTS:
* Demonstrated experience testing applications deployed on AWS (at least 1–2 major services such as EC2, S3, RDS, Lambda, API Gateway, ECS/EKS, or Cloud Front).

* Demonstrated experience with strong knowledge of QA fundamentals: test planning, test case design, defect lifecycle, regression testing, risk-based testing.

* Demonstrated experience with test automation experience using one or more frameworks/languages (e.g., Python + pytest, Java + JUnit/TestNG, JavaScript/Type Script + Playwright/Cypress/Selenium).

* Demonstrated experience writing and maintaining automated tests integrated into CI/CD pipelines (e.g., Git Hub Actions, Jenkins, Git Lab CI, or AWS Code Pipeline/Code Build).

* Demonstrated experience with version control (Git) and standard SDLC practices (Agile/Scrum).

* Demonstrated experience with strong defect isolation and debugging skills; can collaborate with developers/Dev Ops to reproduce issues and validate fixes.
DESIRED

SKILLS:

* Demonstrated experience testing distributed systems/microservices, including asynchronous/event-driven flows (e.g., SQS/SNS/Event Bridge/Kinesis).

* Demonstrated experience with Infrastructure-as-Code exposure (Terraform, AWS Cloud Formation, AWS or CDK) and ability to validate deployments or config changes.

* Demonstrated experience with container platforms and orchestration (Docker, ECS, or EKS/Kubernetes) and testing containerized workloads.

* Demonstrated experience testing APIs (REST/JSON) using tools such as Postman, curl, or similar; ability to validate status codes, payloads, headers, auth, and error handling.

* Demonstrated experience with logging or monitoring for troubleshooting test failures (e.g., Cloud Watch logs/metrics; or Splunk/ELK).

* Demonstrated performance and reliability testing experience (load/stress/soak) using tools such as k6, JMeter, Gatling, Locust; familiarity with scaling behaviors in AWS.

* Demonstrated experience with test data management in cloud environments (synthetic data, masking, seeding, or ephemeral environments).

* Demonstrated AWS certification (Cloud Practitioner, Developer Associate, Sys Ops Associate, or Dev Ops Engineer).

* Demonstrated experience in complex, high security, regulated environments.

* Demonstrated experience with excellent written and verbal communication skills with both technical and non-technical audiences.
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 Required 15 years:
Demonstrated related work 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.  to learn more about us!