Information Security Systems Engineer

About L3Harris

L3Harris is dedicated to recruiting and developing high‑performing talent who are passionate about what they do. Our employees are unified in a shared dedication to our customers’ mission and quest for professional growth. L3Harris provides an inclusive, engaging environment designed to empower employees and promote work‑life success. Fundamental to our culture is an unwavering focus on values, dedication to our communities, and commitment to excellence in everything we do. L3Harris is the Trusted Disruptor in defense tech, delivering end‑to‑end technology solutions across space, air, land, sea and cyber domains in the interest of national security.

Job Details

Location: Chantilly, VA

Schedule: 5/8 Monday – Friday (100% onsite)

Job Description

The successful candidate will support a highly motivated engineering team in defining, designing, implementing, documenting, testing and sustaining security solutions on National Security Systems, or other systems engineered for our government customers. Work will follow current standards within the National Institute of Standards & Technology (NIST) Risk Management Framework, Special Publications 800‑37, 800‑53, 800‑171, and other NIST publications; Committee on National Security Systems Instruction (CNNSI) 1253, Joint SAP Implementation Guide (JSIG), and Federal Information Processing Standards (FIPS) to certify and achieve system accreditations. The role involves collaborating with system developers or commercial product vendors in the design and evaluation of secure systems, networks, and database products using encryption technology, vulnerability analysis and security management.

Essential Functions

• Perform incident response, cyber threat identification, defensive cyber operations coordination, malware analysis, and supply chain risk management assessments per NIST SP 800‑161, including vendor provenance and counterfeit detection.
• Exercise skills in NIST Risk Management Framework (RMF) and related publications: write System Security Plans, Security Control Traceability Matrix, Continuous Monitoring Plan, Security Assessment Plans & Procedures, Security Concept of Operations, and Plan of Action and Milestones.
• Implement and assess security controls: write system security categorization memoranda, recommend appropriate security control overlays, define security control baselines, and apply controls to computing/network nodes with verification.
• Assist in systems/software engineering functions: create data flow diagrams, interface control documents, perform trade studies, and conduct Static Application Security Testing (SAST) for Application Security and Development.
• Ensure Secure Technical Implementation Guide (STIG) compliance using tools such as Fortify, Coverity, and GitLab as part of a DevSecOps CI/CD pipeline, and generate summary reports.
• Define and manage system/security architectures, including security boundaries, vulnerability management, and risk mitigation/remediation strategies for networks, systems, applications, and new technology initiatives (hardware, software, firewalls, IDS/IPS, anti‑virus, deployment tools).
• Implement security architectures for cloud environments (IaaS/PaaS/SaaS) and on‑premises data center systems, configuring and using defense and assessment tools specific to each environment.

Qualifications

• Active Top Secret/SCI security clearance with ability to obtain and maintain Special Access Program (SAP) clearance after hire.
• Bachelor’s degree + minimum 6 years relevant experience, or graduate degree + minimum 4 years relevant experience, or no degree with minimum 10 years relevant experience.
• DoD 8140.03 Level 3 or 4 certification (preferred).

Additional Skills

• Model‑Based System Engineering (UML, SysML, UAF).
• Configure/operate vulnerability analysis tools such as Tenable Nessus.
• Develop dashboards, configure rules, and administer SIEM/audit‑reduction tools (e.g., Splunk).

Pay

Salary range for this role in Virginia is $106,500 – $197,500. Final offer may vary based on experience, geographic location, and other factors.

Benefits

• Health and disability insurance
• 401(k) match
• Flexible spending accounts
• Employee Assistance Program (EAP)
• Education assistance
• Parental leave
• Paid time off
• Company‑paid holidays