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L3Harris Technologies

Global defense contractor delivering aerospace tech

Lead Information Security Systems Engineer

Security Engineering & ArchitectureConfirmed live in the last 24 hours
Full-time

About the Job

Requirements

  • Bachelor’s degree and a minimum of 9 years of prior relevant experience, or a graduate degree and a minimum of 7 years of prior related experience; 12 years of prior related experience may substitute for a degree.
  • A minimum of Collateral Secret security clearance is required.
  • Ability to obtain and maintain a Department of Defense 8140 certification, or NIST 800-181 certification, appropriate for the position within 6 months of starting.
  • Program Protection and System Security Engineering experience, including support of accreditation activities.
  • Experience with Department of Defense 5200.39.
  • Experience in Risk Management Framework accreditation and authorization processes, including steps 1–4 (categorization, control selection, control implementation, and security assessment) and standard body-of-evidence package development.
  • Experience with accreditation and authorization package processing and Risk Management Framework accreditation of Platform IT systems.
  • Experience assessing security and privacy controls in embedded systems using NIST 800-53.
  • Experience with Department of Defense software selection and approval processes for commercial off-the-shelf, government off-the-shelf, and free and open-source software.
  • Experience with security testing and verification.
  • Work 100% onsite in a lab environment, with no remote-support option.

Responsibilities

  • Lead development and implementation of System Security Engineering throughout the System Development Lifecycle.
  • Assess systems for Critical Program Information.
  • Conduct trade studies and develop System Security Engineering requirements.
  • Assess threats through attack and countermeasure analysis.
  • Conduct verification and validation activities.
  • Use Department of Defense 5200.39 to identify and protect Critical Program Information.
  • Engineer trustworthy and secure systems in accordance with NIST 800-160.
  • Develop and implement comprehensive Program Protection Plans to safeguard Critical Program Information and technologies.
  • Draft Program Protection Plans, Cybersecurity Strategies, Security Classification Guides, and System Security Engineering Plans.
  • Interact with customers to define System Security Engineering requirements, solutions, trade-offs, costs, implementation, system impacts, and effectiveness.
  • Support security engineering activities, including basis-of-estimate development, requirements development, design, testing, configuration management, and maintenance of information systems and data.
  • Assist program security in developing policies and procedures for emerging security technologies.
  • Collaborate with customers, internal program teams, and leadership to address program needs.
  • Support vulnerability assessment activities as required.
  • Support evaluation, qualification, testing, and delivery of security-architecture improvements, obsolescence replacements, and vulnerability-response projects.
  • Apply Systems Security Engineering methods, practices, and technologies to the architecture, design, development, evaluation, and integration of systems and networks to maintain system security.
  • Work with government customers to define and implement security protection needs and requirements throughout the system lifecycle to support security authorization.
  • Work with systems developers or commercial product vendors in designing and evaluating secure systems, networks, and database products.
  • Use encryption technology, vulnerability analysis, and security management methods; integrate these methods into a cohesive system security perimeter and environment, with policies and procedures to monitor and maintain it.
  • Prepare Certification and Accreditation documentation using standards and processes under the Risk Management Framework, including Department of Defense 8510, JSIG, ICD-503, and CNSSI 1253, to achieve security authorization of supported systems.
  • Represent program security needs, concerns, and requirements at customer meetings.

Desired Qualifications

  • Prior or current experience developing and implementing System Security Engineering to protect Critical Program Information throughout the System Development Lifecycle.
  • Prior or current experience with Risk Management Framework accreditation and authorization on embedded systems.
  • Prior or current experience developing and conducting High Assurance Device certification on embedded systems.
  • Experience configuring and using cyber defense and vulnerability assessment tools such as ACAS and SCC.
  • Experience in Model-Based Systems Engineering.
  • National Security Agency Type 1 Certification of cryptographic high-value products.
  • Experience with National Security Agency High Assurance products and IASRD requirements.
  • Experience applying Defense Information Systems Agency Security Requirements Guides and Security Technical Implementation Guides.
  • Windows and Linux system administration skills.
  • Experience developing content for and administering security information and event management or audit-reduction tools such as Splunk.
  • Department of Defense 8140 IASAE certification.
  • Strong understanding of engineering processes, concepts, and information security systems engineering principles, including NIST SP 800-160 Volume 1.
  • System test and evaluation methods and Risk Management Framework assessment methodology and process.
  • Experience with cyber defense technologies.
  • Experience with continuous integration/continuous delivery, agile system development, and DevSecOps tools and processes.
  • Understanding of system vulnerabilities and exploitation.
  • Top Secret/SCI clearance with an active polygraph is highly desired.

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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