Info Security Systems Engineer

L3Harris Technologies

. Support an engineering team in defining, designing, implementing, documenting, testing, and sustaining security solutions on National Security Systems and systems engineered for government customers .

Posted 9/17/2026full-timeChantilly • Virginia • United StatesJuniorMid-Level💰 $92,500 - $171,500 per yearWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in security solutions for National Security Systems, utilizing NIST Risk Management Framework and related standards to achieve system accreditations. Proficient in implementing security controls, vulnerability management, and developing comprehensive security documentation.

Highest-signal resume keywords

NIST Risk Management FrameworkDoD 8140.03 IASAE Level 2 CertificationSystem Security PlansVulnerability ManagementDevSecOps CI/CD Pipelines

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Security Solutions ImplementationVulnerability AnalysisSecurity Control AssessmentData Flow DiagramsInterface Control DocumentsSASTRisk Mitigation StrategiesSecurity Documentation WritingConfiguration Management PlansSecurity Architecture Management

Tools & Technologies

FortifyCoverityGitLabTenable NESSUSSplunkIaaSPaaSSaaS

Certifications & Qualifications

Active Top Secret Security ClearanceDoD 8140.03 IASAE Level 2 Certification

Industry Keywords

NIST Special Publications 800-37NIST Special Publications 800-53NIST Special Publications 800-171CNSSI 1253JSIGFIPSContinuous Monitoring PlansSecurity Assessment PlansModel Based Systems EngineeringUML

Tech Stack

Tools & technologies

CloudFirewallsSplunkTypeScript

About the role

Key responsibilities & impact

Support an engineering team in defining, designing, implementing, documenting, testing, and sustaining security solutions on National Security Systems and systems engineered for government customers
Use NIST RMF, CNSSI 1253, JSIG, FIPS, and related standards to certify and achieve system accreditations
Work with system developers and commercial product vendors to design and evaluate secure systems, networks, and database products
Apply encryption technology, vulnerability analysis, and security management methods
Write and maintain security planning, assessment, monitoring, traceability, and risk documentation
Implement and assess security controls across computing and network nodes and verify their implementation
Perform systems/software engineering activities, including data flow diagrams, interface control documents, trade studies, SAST, STIG compliance, and summary reports
Define and manage security architectures, system boundaries, vulnerability management, and risk mitigation/remediation strategies
Configure and use defense and assessment tools for on-premises data centers and secure cloud-based systems
Develop Configuration Management Plans for cloud and other environments

Requirements

What you’ll need

Bachelor’s Degree and minimum 4 years of prior relevant experience, or Graduate Degree and minimum 2 years of prior related experience
In lieu of a degree, minimum 8 years of prior related experience
Active Top Secret security clearance required
DoD 8140.03 IASAE Level 2 certification required
Active TS/SCI with poly highly desired
Knowledge of NIST Risk Management Framework and NIST Special Publications 800-37, 800-53, 800-171
Knowledge of CNSSI 1253, JSIG, and FIPS
Experience writing System Security Plans, Security Control Traceability Matrices, Continuous Monitoring Plans, Security Assessment Plans & Procedures, Security Concept of Operations, and Plans of Action and Milestones
Experience implementing and assessing security controls
Experience with data flow diagrams, interface control documents, trade studies, and SAST
Experience with Fortify/Coverity and GitLab in DevSecOps CI/CD pipelines
Experience defining and managing systems/security architectures, vulnerability management, risk mitigation and remediation strategies
Experience with hardware, software, firewalls, intrusion detection systems, antivirus systems, software deployment tools, and IaaS/PaaS/SaaS cloud environments
Preferred: Model Based Systems Engineering using UML, SysML, or UAF
Preferred: Tenable NESSUS vulnerability analysis tools
Preferred: Splunk or similar SIEM/audit reduction tools

Benefits

Comp & perks

401(k) match
Health insurance
Disability insurance
Flexible spending accounts
Employee Assistance Program (EAP)
Education assistance
Parental leave
Paid time off
Company-paid holidays
9/80 schedule with every other Friday off
Up to 10% travel is possible
Reasonable accommodation for individuals with disabilities