> Markdown version of [/jobs/ext/4253215-it-systems-administrator-ts-sci-with-full-scope-polygraph-clear](https://www.wearedevelopers.com/jobs/ext/4253215-it-systems-administrator-ts-sci-with-full-scope-polygraph-clear). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md).

---

# IT Systems Administrator (TS/SCI with Full Scope Polygraph Clear

- **Company:** General Dynamics Mission Systems, Inc.
- **Location:** Scottsdale, AZ, United States
- **Experience:** Experienced
- **Salary:** $111,881.0
- **Contract:** Permanent contract
- **Skills:** Artificial Intelligence, Information Systems, File Transfer, Identity and Access Management, Information Management, Information Technology Audit, Red Hat Enterprise Linux, Software Configuration Management, Information Security Management System, Information Technology, Nessus, Scap Compliance Checker
- **Published:** October 5, 2026
- **Apply:** https://www.clearancejobs.com/jobs/9218265/it-systems-administrator-tssci-with-full-scope-polygraph-clear

## About the Role

Bachelor's degree in a related specialized area or equivalent is required plus a minimum of 5 years of relevant experience; or Master's degree plus a minimum of 3 years of relevant experience., Department of Defense TS/SCI security clearance with Polygraph is required at time of hire. Applicants selected will be subject to a U.S. Government security investigation and must meet eligibility requirements for access to classified information. Due to the nature of work performed within our facilities, U.S. citizenship is required., * RHEL (Red Hat Enterprise Linux) & Windows Administration Experience

 * Experience with various system security assessment/hardening tools - SCAP Compliance Checker, STIG Viewer, ACAS/Nessus, etc.
 * Trained and proficient in Assured File Transfer (AFT) procedures
 * Self-starter with the ability to operate independently with minimal supervision
 * Install and configure servers
 * Understanding of STGs & Vulnerability resolution

What sets you apart:

 * Outstanding communications skills
 * Ability to work collaboratively in a cross-functional team throughout the system life cycle
 * DoD 8570 Certification meeting IAM Level I (e.g., Security + CE, CAP, GSLC)
 * Adjudicated polygraph
 * Cleared TS/ SCI
 * Identifies opportunities to apply AI for continuous improvement and innovation

## Description

General Dynamics Mission Systems currently has a career opportunity for an I T System Administrator for our Restricted Ground Systems. As a member of our Information Assurance Security team, you'll support the Information System (IS) Risk Management Framework activities from categorizing systems and preparing IS packages, to reviewing vulnerability scans, executing Change Control processes, and supporting upgrades of systems during program execution. The IT System Admin maintains the day-to-day security posture and continuous monitoring of Information Systems for DoD security programs, and includes security event & information management review and analysis, end user account audits, etc. Are you ready to make a difference?, * Perform weekly system audit reviews, media reviews, hardware/software configuration management

 * Perform monthly scans and coordinate with team members to adjudicate results
 * Execute security testing and evaluation to ensure correct implementation of security controls
 * Support the assessment and mitigation of vulnerabilities throughout a systems life cycle
 * Perform incident response and cleanup actions when necessary per company or customer directions
 * Ensure systems are operated, maintained, and disposed of in accordance with internal security policies and procedures outlined in the System Security Plan (SSP)