> Markdown version of [/jobs/ext/4291105-information-systems-security-engineer](https://www.wearedevelopers.com/jobs/ext/4291105-information-systems-security-engineer). 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).

---

# Information Systems Security Engineer

- **Company:** System One
- **Location:** Clarksburg, MD, United States
- **Salary:** $180,000.0
- **Contract:** Permanent contract
- **Skills:** Xacta, Cyber Security, Red Hat Enterprise Linux, Security Software, Software Vulnerability Management, Cloud Platform System, Tenable Nessus, Vulnerability Analysis
- **Published:** October 23, 2026
- **Apply:** https://www.thejobnetwork.com/job/9beceb7a-15a2-4159-97ee-3f1f84123d0d/information-systems-security-engineer

## About the Role

* Active TS/SCI with Polygraph security clearance
 * DoD 8570/8140 IASAE Level II compliant certification (required)
 * Strong working knowledge of RMF
 * Experience supporting A&A activities and ATO processes
 * Experience implementing/validating security controls and supporting continuous monitoring
 * Familiarity with NIST SP 800-37 and NIST SP 800-53 (Rev. 3 and/or Rev. 5)
 * Experience with RMF/cybersecurity tools such as: LATTEART, XACTA, BISCOTTI, WATCHCAT, STE
 * Experience using compliance and configuration scanning tools
 * Strong documentation, analytical, and troubleshooting skills

NICE TO HAVE

 * Experience working in classified cybersecurity environments
 * Familiarity with enterprise Linux, networking, and/or cloud environments
 * Experience partnering with ISSOs, ISSMs, SCAs, and System Owners
 * Experience supporting large-scale enterprise or mission systems
 * Exposure to vulnerability management automation and reporting workflows

CERTIFICATION EXAMPLES (IASAE LEVEL II) Common qualifying certifications include:

 * CISSP
 * CASP+
 * CCSP
 * CSSLP

## Description

Location: Clarksburg, Maryland Work Model: Onsite Type: Direct Hire Compensation: $180,000 (salary) Schedule: 40 hours/week Clearance Required: Active TS/SCI with Polygraph (must be current) Certification Required: DoD 8570/8140 IASAE Level II (compliant)

ROLE OVERVIEW We're hiring an Information Systems Security Engineer (ISSE) to support mission-critical work in a classified environment. In this role, you'll help build, secure, and maintain systems by applying cybersecurity engineering best practices across design, implementation, authorization, and ongoing compliance.

You'll be hands-on with the Risk Management Framework (RMF), Assessment & Authorization (A&A), ATO sustainment, control validation, continuous monitoring, and vulnerability/stig compliance efforts-partnering closely with security and technical teams.

WHAT YOU'LL DO

 * Support the full RMF lifecycle for classified systems (from planning through continuous monitoring)
 * Contribute to A&A packages and help maintain ATOs over time
 * Implement, assess, and validate security controls and technical requirements
 * Build and maintain RMF documentation and "body of evidence" artifacts
 * Support system boundary definition and security architecture documentation
 * Run and analyze compliance/vulnerability scans; validate results (including false positives)
 * Support STIG implementation, configuration hardening, and remediation verification
 * Help manage patch validation and ongoing security compliance activities
 * Participate in Continuous Monitoring (ConMon) activities and reporting