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L3Harris Technologies

Global defense contractor delivering aerospace tech

Lead Information Security Systems Engineer

Security Engineering & Architecture +1Confirmed live in the last 24 hours
Full-timeChantilly, VA, USA

About the Job

Requirements

  • A Bachelor's degree with at least 9 years of prior relevant experience, or a Graduate degree with at least 7 years of prior related experience; alternatively, at least 13 years of prior related experience in lieu of a degree.
  • Active Top Secret security clearance.
  • DoD 8140.03 IASAE Level 2 certification.

Responsibilities

  • Support an engineering team in defining, designing, implementing, documenting, testing, and sustaining security solutions on National Security Systems or other systems engineered for government customers, using applicable NIST Risk Management Framework standards and publications, CNSSI 1253, JSIG, and FIPS to certify and achieve system accreditations.
  • Work with system developers or commercial product vendors to design and evaluate secure systems, networks, and database products using encryption technology, vulnerability analysis, and security management.
  • Apply the NIST Risk Management Framework and related publications to produce System Security Plans, Security Control Traceability Matrices, Continuous Monitoring Plans, Security Assessment Plans and Procedures, Security Concepts of Operations, and Plans of Action and Milestones.
  • Implement and assess security controls by writing system security categorization memoranda, recommending security control overlays, defining security control baselines based on system categorization and approved overlays, applying controls to computing and network nodes, and verifying their implementation.
  • Assist with systems and software engineering by creating data flow diagrams and interface control documents, performing trade studies and Static Application Security Testing for application security and Secure Technical Implementation Guide compliance using Fortify, Coverity, and GitLab in a DevSecOps continuous integration/continuous deployment pipeline, and generating summary reports.
  • Define and manage systems and security architectures, including security boundaries, vulnerability management, and risk mitigation and remediation strategies for networks, systems, applications, and new technology initiatives, including hardware, software, firewalls, intrusion detection systems, antivirus systems, and software deployment tools.
  • Define and manage Infrastructure, Platform, and Software as a Service implementations in cloud environments and develop Configuration Management Plans.
  • Define and manage security architectures and boundaries for on-premises data center systems and deploy them to secure cloud-based systems, including configuring and using environment-specific defense and assessment tools.
  • Perform the position fully onsite; travel of up to 10% is possible.

Desired Qualifications

  • Perform Model-Based Systems Engineering using UML, SysML, and UAF.
  • Configure and operate Tenable Nessus vulnerability analysis tools.
  • Develop dashboards, configure rules, and operate or administer SIEM and audit-reduction tools such as Splunk.

About the Company

L3Harris Technologies

Global defense contractor delivering aerospace tech

L3Harris Technologies provides advanced aerospace, defense, and space systems for governments and commercial customers. Its products include sensors, communications, and propulsion—such as tactical radios, night-vision gear, satellite payloads, missile defense, and space propulsion—delivered as integrated systems for operations across air, land, sea, space, and cyber domains. The company blends legacy technologies from two joining giants with newer capabilities, faster acquisition cycles, and a focus on missiles, space, and resilient communications to field solutions quickly. Its goal is to be a trusted, scale-ready provider of next‑generation defense and intelligence capabilities for national security and related customers.

Company size
10,001+
Company stage
IPO
Headquarters
Melbourne, FL
Founded
1895

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