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# Information Systems Security Specialist ATO

- **Company:** AMERICAN SYSTEMS
- **Location:** Fredericksburg, VA, United States
- **Experience:** Experienced
- **Salary:** $130,000.0
- **Contract:** Permanent contract
- **Skills:** Xacta, Microsoft Excel, Software Documentation, Cyber Security, Document Management Systems, Microsoft Office, Role-Based Access Control, Smartsuite, Software Vulnerability Management, Data Processing, Tanium Platform Expertise, Nessus, Software Version Control, Plan of Action and Milestones, Vulnerability Analysis
- **Published:** October 3, 2026
- **Apply:** https://www.clearancejobs.com/jobs/9214832/information-systems-security-specialist-ato

## About the Role

* Active Top Secret clearance with SCI eligibility.
 * HS + 13 years, AS + 10 years, BS + 6 years, or MS + 4 years of relevant experience in IT, cybersecurity, compliance, program support, or administrative/project coordination, preferably in a federal or DoD environment.
 * Experience supporting cybersecurity compliance, documentation, coordination, or program execution in a federal/DoD setting.
 * Strong organizational, written, and verbal communication skills, with the ability to manage multiple stakeholders, deadlines, and action items independently.
 * Working knowledge of cybersecurity fundamentals, including access control, least privilege, patching, vulnerability management, data handling, and incident reporting.
 * Experience with security documentation, agreement tracking, inventory management, artifact management, and POA&M status reporting.
 * Familiarity with GRC tools such as Xacta or eMASS.
 * Familiarity with vulnerability scanning tools and outputs such as ACAS/Nessus, Tenable, Tanium, or similar.
 * Exposure to RMF, NIST SP 800-53, STIGs, ATO processes, and system interconnection agreements such as ISAs and MOUs.
 * Proficiency with Microsoft Office, especially Excel, and Microsoft Teams.
 * Professional follow-through, sound judgment, and the ability to know when to act independently and when to escalate.

Pay Transparency Statement

## Description

* Support the ISSO/Security Architect as a secondary point of contact with programs, system owners, administrators, and other stakeholders.
 * Track correspondence, action items, deliverables, deadlines, and meeting follow-ups through closure.
 * Schedule meetings, capture notes, distribute action items, and maintain project planning boards and deliverable trackers.
 * Review, track, and maintain security and interconnection documentation, including ISAs, SLAs, OLAs, MOUs, MOAs, PTAs, and PIAs, including routing, signatures, expirations, and renewals.
 * Draft, format, review, and maintain supporting security documentation, ensuring completeness, consistency, version control, and organized document management.
 * Track vulnerability scan results, remediation status, and POA&M items; coordinate scan schedules and follow up on open findings with system administrators.
 * Maintain hardware and software inventories and ensure alignment with system documentation and the authorization boundary.
 * Enter and update artifacts, control status, inventories, evidence, and POA&Ms in GRC tools such as Xacta; generate status reports for assessments and continuous monitoring.
 * Support ongoing RMF, ATO, and continuous monitoring activities, and escalate unresolved issues, documentation gaps, or schedule risks as needed.