Sr. Embedded Systems Security Engineer (Onsite - Largo, FL or Marlborough, MA) Secret clearance required

Date Posted: 2026-08-24 Country: United States of America Location: US-FL-LARGO-382SR ~ 7887 Bryan Dairy Rd ~ BLDG 600 Position Role Type: Onsite U.S. Citizen, U.S. Person, or Immigration Status Requirements: 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​ Security Clearance Type: Secret - Current Security Clearance Status: Active and existing security clearance required on day 1 Raytheon Company, Managed by Collins Aerospace At RTX, the world's largest aerospace and defense company, 185,000 great minds are united by purpose and inspired to make a difference solving the world’s most complex problems. With our three market leading businesses, world-class operations and investments in research and development, we offer capabilities and opportunity no one else can. Together, we push the boundaries of known science and find new ways to connect and protect our world. Collins Aerospace is a leader in technologically advanced, intelligent solutions that help redefine the aerospace and defense industry. With a comprehensive portfolio and deep technical expertise, we help customers meet the demands of the global market. Join us and help shape the future of aerospace and defense. You will be a member of the Collins Product Cybersecurity Organization (PCO) supporting strategic defense and protected communication systems programs. We are a growing business developing new products in an aggressive and competitive market. The new designs are exciting and technically challenging. The Product Cybersecurity Engineering DoD East Florida team is hiring a Sr. Embedded Systems 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 and work collaboratively with cross-functional engineering teams on the program they support. This role will be worked onsite in Largo, FL or Marlborough, MA. and will require an active SECRET clearance. Relocation assistance is available.  What You Will Do: Perform RMF Authorization to Operate (ATO) and NSA Type 1 Cryptographic Certification activities, including development and maintenance of required security documentation, evidence, and assessment artifacts Perform cybersecurity requirement decomposition, allocation, implementation, and verification across assigned system components and interfaces using systems engineering practices Analyze system requirements, models, interfaces, and architectures to identify security vulnerabilities, develop mitigation recommendations, and maintain traceability between security requirements and system implementation Lead security engineering inputs for assigned system design reviews and document security risks, requirements, recommendations, and resolution status Coordinate with systems engineers and software/hardware developers to integrate security requirements into system designs and track security issues through verification and closure Develop and execute security-focused Software Verification & Validation activities, including test plans, test procedures, test cases, test conduct, results documentation, and remediation analysis Coordinate assigned cybersecurity engineering activities across systems engineering, software, hardware, and test organizations and provide status and technical findings to program leadership Assess applicable security threats, vulnerabilities, and industry practices and evaluate their impact on assigned system architectures, requirements, and implementations Qualifications You Must Have: Typically requires a degree in Science, Technology, Engineering or Mathematics (STEM) and a minimum of 5 years of prior relevant experience, or an Advanced Degree in a related field and a minimum of 3 years of experience U.S. citizenship is required , as only U.S. citizens are eligible for a security clearance Active and transferable SECRET U.S. government issued security clearance is required prior to start date Experience performing cybersecurity or product security engineering activities for embedded, aerospace, defense, or other mission-critical systems Experience developing or executing security-focused system verification and validation activities, including test plans, procedures, test conduct, and results analysis Experience applying Risk Management Framework (RMF) processes to system certification, authorization, or security assessment activities Experience decomposing, allocating, implementing, and verifying cybersecurity requirements using systems engineering practices Experience analyzing system requirements, models, diagrams, interfaces, or architectures to identify security risks and develop mitigation recommendations Experience developing technical security documentation, including security requirements, assessments, certification artifacts, or verification documentation Qualifications We Prefer: Active and transferable TOP SECRET clearance Experience with NSA cryptographic certification, Cross Domain Solution (CDS) requirements, and NIAP Experience with DOORS, JIRA, Confluence, Cameo (MBSE), or other systems modeling and agile tools Security-related certifications (e.g., CISSP, Security+) and/or an Electrical or Computer Engineering degree Experience with security p