Lead, Information Security Systems Engineer (ISSE)

Location: Greenville, TX, US

Employment Type: Full-Time

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. With customers’ mission-critical needs always in mind, our employees deliver end-to-end technology solutions connecting the space, air, land, sea and cyber domains in the interest of national security.

Job Title: Lead, Information Security Systems Engineer (ISSE)

Job Code: 45429

Job Location: Greenville, TX

Job Schedule: 9/80 - Employees work 9 out of every 14 days – totaling 80 hours worked – and have every other Friday off

Job Description:

L3Harris Technologies is seeking an experienced Information Systems Security Engineer (ISSE) to join our Sensor Infrastructure team. The ideal candidate is a subject matter expert with comprehensive knowledge of information security principles and practices, bringing deep expertise in vulnerability scanning, compliance frameworks, secure system design and Authorization to Operate (ATO) documentation.

Essential Functions:

• 10% travel based on business needs.
• Author and review security requirements, ensuring alignment with applicable frameworks and policies.
• Identify and implement significant improvements to security processes, systems, and controls.
• Prepare and deliver technical briefing materials for leadership and stakeholders.
• Provide input into new security products and processes with measurable impact on business and mission outcomes.
• Lead system requirements management, decomposition, traceability, verification, and validation.
• Define, analyze, allocate, and manage system, subsystem, and component requirements.
• Evaluate requirements flow-down, definition quality, and traceability.
• Conduct trade studies across hardware, software, and system design alternatives.
• Support hardware selection for mission systems, processing, networking, sensors, storage, and infrastructure.
• Develop and review verification plans, test procedures, and test reports.
• Resolve complex technical issues and support final platform trade-off decisions with Chief Engineers.
• Work closely with stakeholders inside of IT and within other business functions to enforce the organizational security strategy.
• Translate complex technical issues into clear, actionable insights for stakeholders.
• Contribute to security standards, architectural guidance and policy improvements.

Qualifications:

• Active US TS/SCI security clearance.
• DoD 8140.03 IASAE Level 2 certification.
• Bachelor’s Degree and minimum 9 years of prior relevant experience.
• Graduate Degree and a minimum of 7 years of prior related experience.
• In lieu of a degree, a minimum of 13 years of prior related experience.
• Demonstrated experience authoring and reviewing security requirements.

• Demonstrated experience improving security processes, systems, and controls.
• Demonstrated experience developing and reviewing verification plans, test procedures, and test reports.
• Demonstrated experience with vulnerability scanning tools (e.g., Nessus, Tenable, ACAS).
• Demonstrated experience working with ISR platforms, mission systems, sensors, payload integration, battle management command & control systems.
• Demonstrated experience with technical documentation, interface control, and requirement management tools.
• Demonstrated experience in performing trade studies and supporting technical decision-making for hardware and/or software selection.
• Demonstrated ability to communicate and influence security practices across organizational boundaries.

Preferred Additional Skills

• Project management experience supporting large-scale, complex security initiatives
• Knowledge of radar, EO/IR, SIGINT, Communications or Networking
• Experience with Model-Based Systems Engineering (MBSE) tools and methods
• Experience with DOORS, Cameo, JIRA or other lifecycle engineering tools.
• Familiarity with Sensor Infrastructure or similar complex system architectures.

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L3Harris Technologies is proud to be an Equal Opportunity Employer. L3Harris is committed to treating all employees and applicants for employment with respect and dignity and maintaining a workplace that is free from unlawful discrimination. All applicants will be considered for employment without regard to race, color, religion, age, national origin, ancestry, ethnicity, gender (including pregnancy, childbirth, breastfeeding or other related medical conditions), gender identity, gender expression, sexual orientation, marital status, veteran status, disability, genetic information, citizenship status, characteristic or membership in any other group protected by federal, state or local laws. L3Harris maintains a drug-free workplace and performs pre-employment substance abuse testing and background checks, where permitted by law.

Please be aware many of our positions require the ability to obtain a security clearance. Security clearances may only be granted to U.S. citizens. In addition, applicants who accept a conditional offer of employment may be subject to government security investigation(s) and must meet eligibility requirements for access to classified information.

By submitting your resume for this position, you understand and agree that L3Harris Technologies may share your resume, as well as any other related personal information or documentation you provide, with its subsidiaries and affiliated companies for the purpose of considering you for other available positions.

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