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# Principal Embedded System Security Engineer (Onsite - Largo, FL) Secret clearance required

- **Company:** RTX
- **Location:** Largo, FL, United States
- **Experience:** Expert
- **Salary:** $107,500.0 - $204,500.0
- **Contract:** Permanent contract
- **Skills:** Systems Engineering, Confluence, JIRA, Computer Engineering, Nmap, Software Requirements Analysis, Verification and Validation (Software), Systems Architecture, DOORS (Software), SC Clearance, Atlassian Tools, Nessus
- **Published:** October 29, 2026
- **Apply:** https://globalhr.wd5.myworkdayjobs.com/REC_RTX_Ext_Gateway/job/US-FL-LARGO-382SR--7887-Bryan-Dairy-Rd--BLDG-600/Principal-Embedded-System-Security-Engineer--Onsite---Largo--FL--Secret-clearance-required_01884809

## About the Role

Active and transferable U.S. government issued security clearance is required prior to start date. U.S. citizenship is required, as only U.S. citizens are eligible for a security clearance, * Typically requires a degree in Science, Technology, Engineering or Mathematics (STEM) and minimum 8 years prior relevant experience or an Advanced Degree in a related field and minimum 5 years of experience

 * Active and transferable SECRET clearance is required prior to start date
 * U.S. citizenship is required, as only U.S. citizens are eligible for a security clearance
 * Direct experience in System Security Engineering
 * Experience with Risk Management Framework (RMF) applied to mission systems used in disconnected DoD environments
 * Experience with general technical security concepts, technologies, and implementations
 * Technical writing skills and ability to develop security documentation
 * Analytical skills with the ability to perform deep dives into system requirements
 * Experience interpreting system models, diagrams, and architectures to assess security risks
 * Willingness to learn about satellite systems, communication systems, and evolving security technologies, * Experience with National Security Agency (NSA) cryptographic certification, Cross Domain Solution (CDS) requirements, and National Information Assurance Partnership (NIAP)
 * Experience in at least two of the following areas: System, Test, Software, Mechanical, Electrical Engineering
 * Familiarity with DOORS, JIRA, Confluence, Cameo (MBSE experience), or other systems modeling and agile tools
 * Advanced Security-related certifications (e.g., CISSP, Sec+, etc.) and Electrical or Computer Engineering Degree
 * Prior experience working with security protocols used in embedded systems and communications for aerospace environments
 * Familiarity with DoD focused security assessment tools, e.g. SCC, NMAP, Evaluate-STIG,Nessus, ACAS, Vulnerator, eMASSster, etc.
 * Willingness to learn about satellite systems, communication systems, and evolving security technologies
 * Exemplifies the RTX leadership behavior including collaboration, effective communications, courage, customer focus, develops talent, drives results, instills trust

## Description

The Product Cybersecurity Engineering DoD East Florida team is hiring a Principal Embedded System Security Engineer to support programs for our US military and various international customers, keeping the world safe from foreign threats. This team supports

multiple Collins contracts and is seeking to fill roles across several open contracts - our goal is to align each new hire with a position that best suits their skills and allows for career growth.

The ideal candidate will be skilled in requirement allocation and decomposition, analyzing system architectures, designing security features and principles, assessing security vulnerabilities (scanning), and formal cybersecurity test and evaluation (CT&E). The candidate will report to the Senior Manager of Cybersecurity Engineering in Largo FL and work collaboratively with cross-functional engineering teams on the program they support.

This role will be worked onsite in Largo, FL and will require an active SECRET clearance. Relocation assistance is available.

What You Will Do:

 * Lead system certification and accreditation efforts, including Risk Management Framework (RMF) Authorization To Operate (ATO) and National Security Agency (NSA) Type 1 Cryptographic Certification
 * Lead cybersecurity requirement decomposition, allocation, implementation, and verification utilizing system engineering practices. Analyze system requirements, models, and diagrams to identify potential security vulnerabilities. Participate in system design discussions and provide security engineering input
 * Collaborate with systems engineers and developers to integrate security considerations into system design. Work as part of a team, contributing to a culture of collaboration and continuous learning
 * Maintain awareness of evolving security threats and industry best practices
 * Participate in Security focused-System Verification and Validation including writing test plans and procedures, performing test conduct, and providing remediation recommendation analysis