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Specialist, Information Security Systems Engineer (ISSE)

Palm Bay, Florida, Fort Wayne, Indiana, Wilmington, Massachusetts
Full Time On-site

L3Harris is looking for an experienced Information Security Systems Engineer (ISSE) to join the Engineering team in Palm Bay, FL supporting the design, implementation, and sustainment of secure information systems across enterprise and program environments. This role is responsible for applying cybersecurity engineering principles throughout the system lifecycle, helping ensure systems meet security, compliance, and mission requirements. The ideal candidate will be able to prepare and manage the Assessment & Authorization documentation using NIST Risk Management Framework (RMF) to achieve system Authorization to Operate (ATO). 

Essential Functions: 

  • Prepare and manage Assessment and Authorization documentation using RMF and derivative processes (e.g., DOD 8510, JSIG, ICD-503, CNSSI 1253) to achieve security authorization of supported systems.
  • Support the design, integration, and maintenance of secure system architectures for on-premises environments.
  • Apply cybersecurity principles and security-by-design practices throughout the system development lifecycle.
  • Analyze system requirements and derive security requirements, controls, and technical solutions.
  • Perform security assessments, gap analyses, and risk evaluations for information systems and supporting infrastructure.
  • Perform research required to identify vulnerability details and solutions to assist other cyber disciplines with their correction or mitigation.
  • Support implementation and validation of security controls in alignment with applicable regulatory, contractual, and organizational requirements.
  • Participate in Linux & Windows system hardening, secure configuration, patch management, and vulnerability remediation activities.
  • Contribute to development of policies, standards, procedures, and technical documentation related to information security engineering.
  • Support audits, inspections, and customer assessments by providing technical evidence and responses.
  • Communicate technical risks, findings, and recommendations to both technical and non-technical stakeholders.

Qualifications: 

  • Bachelor’s Degree and minimum 4 years of prior relevant experience. Graduate Degree and a minimum of 2 years of prior related experience. In lieu of a degree, minimum of 8 years of prior related experience.
  • Active clearance: TS/SCI w/CI Poly.
  • Must have or be able to obtain and maintain IAT Level II minimum (Security+ CE, CCNA Security, or equivalent) within 3-months of start. 

Preferred Additional Skills: 

  • Familiarity with emerging technologies such as cloud computing, containerization, and microservices, and their security implications (e.g. Understanding of security control inheritance in cloud-based systems.)
  • Familiarity with STIG/SRG compliance validation and automated compliance scanning tools.
  • Experience with security tools such as IDS/IPS, vulnerability scanners, and endpoint protection solutions.
  • Professional certifications such as Security+, CISSP, or similar.
  • Familiarity with DevSecOps practices, CI/CD pipeline security, and infrastructure as code security principles.
  • Experience in regulated environments such as defense, aerospace, government contracting, or critical infrastructure.

#LI-FS1

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.

L3Harris Technologies is an E-Verify Employer. Please click here for the E-Verify Poster in English or Spanish. For information regarding your Right To Work, please click here for English or Spanish.

About L3 Harris

L3 Harris

L3 Harris is one of the largest defense and aerospace companies in the United States, delivering advanced technologies that support missions across air, land, sea, space, and cyber domains. The company develops communications systems, space payloads, intelligence platforms, electronic warfare capabilities, missile defense technologies, and mission-critical sensors used by the U.S. military, intelligence community, and allied nations around the world.

For job seekers, L3Harris offers opportunities across engineering, software development, cybersecurity, space systems, manufacturing, intelligence, program management, and mission operations. The company is especially attractive to veterans, cleared professionals, and engineers who want to work on advanced technologies that directly support national security. With programs spanning tactical communications, ISR platforms, satellite systems, and defense electronics, employees have the opportunity to contribute to some of the military’s most important capabilities.

Unlike companies focused on a single mission area, L3Harris operates across a diverse portfolio of defense technologies, providing employees exposure to a broad range of programs and technical disciplines. Teams work on everything from secure communications and autonomous systems to space-based sensors and electronic warfare platforms, creating opportunities for both specialization and long-term career growth within the organization.

As governments continue investing in modernization, space capabilities, resilient communications, and advanced sensing technologies, L3Harris remains one of the most important employers in the defense industry. For professionals seeking a mission-driven career with strong growth opportunities, technical challenges, and direct impact on global security, L3Harris continues to stand out as a leading destination in aerospace and defense.

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