Systems Admin Sr Adv (TS/SCI with Poly Required) with Security Clearance

Job Category: Systems Administration Requisition Number: SYSTE001884 Posting Details * * Posted: June 9, 2026 * Full-Time * On-site * Salary Range: $121,680 USD to $203,195.20 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 Sof…