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# Lead Information Systems Security Engineer (ISSE) - TS/SCI with Polygraph

- **Company:** General Dynamics Information Technology
- **Location:** Washington, DC, United States
- **Experience:** Expert
- **Salary:** $164,382 - $207,000
- **Contract:** Permanent contract
- **Skills:** Cyber Security, Information Systems, Information Security Management, Plan of Action and Milestones
- **Published:** October 21, 2026
- **Apply:** https://www.dcjobsite.com/job.asp?id=3472069675&tx=KJ3939FFF&pt=1&aff=0B19D771-A501-4A5E-8338-2A822B784D54&utm_source=Job%20Feed&utm_medium=textkernel&utm_campaign=DE&utm_term=0B19D771-A501-4A5E-8338-2A822B784D54

## About the Role

Information System Security,Plan of Action and Milestones (POA&M),Risk Assessments

Experience:

10 + years of related experience, * Required Education and Experience: Technical Training, Certification(s) or Degree + 10 years

 * 10+ years of cybersecurity, information assurance, or security engineering experience.
 * Cleareance: Active TS/SCI with Polygraph
 * Certification Required: DoD Manual 8570.01-M at the Information Assurance System Architects & Engineer (IASAE Level II) role
 * Experience mentoring or leading security teams.
 * Direct experience leading A&A/ATO efforts for large or complex systems.
 * Mastery of RMF, ICD 503, and IC accreditation processes.
 * Strong technical writing expertise, especially in SSPs, CONOPS, POA&Ms, and audit documentation.
 * Ability to translate complex engineering details into security artifacts and briefings.
 * Location: On Customer Site, * Experience supporting DoW or Intelligence Community customers.
 * Background in secure systems architecture or engineering.
 * Familiarity with high-value assets, cross-domain systems, or TS/SCI mission systems.
 * Experience leading A&A for Special Access Programs

## Description

* Serve as the lead engineer for security accreditation, guiding ISSMs, SCAs, PMs, and engineering teams through the entire RMF/ICD 503 lifecycle.
 * Drive systems to achieve ATD ? IATT ? ATO, ensuring technical and documentation readiness at each gate.
 * Act as the primary point of contact for customer security organizations, audit teams, and senior leadership.
 * Mentor junior engineers and provide technical oversight across multiple projects.

Technical Security Engineering

 * Conduct in-depth technical reviews of system architectures and document security-relevant components for SSPs and CONOPS.
 * Lead the development, review, and execution of all RMF/ICD 503 documentation, including SSP, CONOPS, Contingency Plans, User Guides, and SOPs.
 * Review and update control volatility assessments based on evolving threats, IC policies, federal standards, and system sensitivity levels.
 * Support Information Systems Continuous Monitoring (ISCM) activities, performing technical content reviews and recommending improvements.

A&A Execution and Compliance

 * Track, document, and communicate A&A progress across multiple systems to customer leadership.
 * Own POA&M development, mitigation strategies, and evidence collection from system owners and engineers.
 * Provide audit liaison support for internal and external audits, delivering concise, actionable recommendations.
 * Ensure ongoing compliance and readiness through proactive security oversight and risk assessments.