Specialist, Information Security Systems Engineer (ISSE)

L3HHCM20•Palm Bay, FL

5d•Onsite

About The Position

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).

Requirements

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.

Nice To Haves

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.

Responsibilities

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.