ISSE: Secure Systems Architect & RMF Expert

Peraton; Herndon (VA); On-site; USD 135,000 - 216,000; Full time

Benefits offered by this job

25 days PTO

Bonus plan

Enhanced benefits

Job summary

Peraton is seeking an Information System Security Engineer (ISSE) to lead security engineering across complex networks and ensure RMF‑aligned controls are designed and implemented for new and existing systems.

In this role you will validate configurations, support testing, monitor production controls, and contribute to risk assessments and POA&M management. The position emphasizes DevSecOps integration, continuous monitoring, and cross‑team collaboration on security requirements.

Qualifications

• Bachelor’s degree in a relevant field with 10+ years of experience or a Master’s with 8+ years; additional 4 years may substitute a degree.
• Active TS/SCI or SCI eligibility with polygraph.
• Experience supporting RMF A&A processes and documentation.
• Experience collaborating with developers/architects to implement security requirements.
• Ability to guide developers on policy and compliance.
• Experience with DISA STIGs and STIG Viewer.
• Extensive experience with Linux operating systems.
• Proven experience with Security Information and Event Monitoring (Splunk).
• Hands-on in developing and validating security controls and test procedures.
• Knowledge of current security risks, protocols, and threat landscapes.
• DoD 8570 IAT/IAM Level II certification (e.g., Security+).
• Experience with RMF tools such as Xacta.
• Ability to work full-time in a SCIF.

Responsibilities

• Lead security engineering activities across complex information systems.
• Design and implement RMF-aligned security controls for new and existing networks.
• Validate compliance with configuration guidance and support testing of security designs.
• Monitor security control implementations in production environments and address risk findings.
• Contribute to POA&M management and system-level security metrics.
• Analyze logs and support IS/SSOC activities using SIEM tools.
• Review ACAS scans and advise on mitigations and remediation.
• Assist with DISA STIG analysis and secure configurations.
• Collaborate with system leads, ISSOs, and program managers on security tasks.
• Develop and validate security requirements and risk mitigations.
• Lead audits and ensure regulatory compliance across environments.

Skills

SIEM Analysis

Vulnerability Analysis

STIG Compliance

DevSecOps

Continuous Monitoring

Security Engineering

Cross‑Team Coordination

Security Requirements

Risk Assessment

Security Audits

Education

Bachelor's degree

Master's degree

Tools

Xacta

Splunk

STIG Viewer

Linux

Job description

Peraton is seeking an Information System Security Engineer (ISSE) to lead security engineering across complex networks and ensure RMF‑aligned controls are designed and implemented for new and existing systems.

In this role you will validate configurations, support testing, monitor production controls, and contribute to risk assessments and POA&M management. The position emphasizes DevSecOps integration, continuous monitoring, and cross‑team collaboration on security requirements.