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# Information System Security Engineer (ISSE)

- **Company:** ARSquare Tech LLC
- **Location:** Annapolis Junction, MD, United States
- **Contract:** Permanent contract
- **Skills:** Cyber Security, Information Security Management, Package Development Process, Security Software, Tenable Nessus, Vulnerability Analysis
- **Published:** October 16, 2026
- **Apply:** https://www.careerjet.com/job/us8a070b35cb890fde25bf80c7bfef1e98/eaa

## About the Role

Clearance Required: Active TS/SCI with Full Scope Polygraph
Certification Requirement: DoD 8570/8140 IASAE Level II Compliant Certification Required, * Active TS/SCI with Full Scope Polygraph security clearance

 * U.S. Citizenship
 * DoD 8570/8140 IASAE Level II compliant certification required
 * Strong understanding of the Risk Management Framework (RMF)
 * Experience supporting Assessment & Authorization (A&A) and Authority to Operate (ATO) processes
 * Experience with security control implementation, validation, and continuous monitoring
 * Familiarity with NIST SP 800-37 and NIST SP 800-53 (Rev. 3 and/or Rev. 5)
 * Experience with RMF and cybersecurity tools such as:LATTEARTXACTABISCOTTIWATCHCATSTE
 * Experience with compliance and configuration scanning tools
 * Strong analytical, troubleshooting, and documentation skills

## Description

* Support the full RMF lifecycle for classified systems
 * Assist with A&A package development and Authority to Operate (ATO) maintenance
 * Implement, assess, and validate security controls
 * Perform Security Control Traceability and technical validation
 * Support system boundary definition and security architecture documentation
 * Develop and maintain RMF artifacts and body of evidence packages
 * Conduct compliance and vulnerability scanning analysis
 * Validate findings including false positive identification and remediation verification
 * Support STIG implementation and configuration hardening
 * Manage patch validation and security compliance efforts
 * Participate in Continuous Monitoring (ConMon) activities