Sr. Principal Embedded System Security Engineer (Onsite - Marlborough, MA or Largo, FL) Secret Clearance required

Date Posted: 2026-08-19 Country: United States of America Location: US-MA-MARLBOROUGH-MA4 ~ 1001 Boston Post Rd ~ BLDG 4 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. The Product Cybersecurity Engineering team is hiring a Senior Principal Embedded Systems Security Engineer to support programs for our US military, keeping the world safe from foreign threats. 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 Marlborough, MA or Largo, FL.  Relocation assistance not available. Requires an active and transferrable SECRET clearance. What You Will Do: Work with customers and internal stakeholders to define cybersecurity requirement decomposition, allocation, implementation, and verification utilizing system engineering practices; providing guidance and direction related to security technologies Define cybersecurity requirements, design, and architecture artifacts; collaborating with program and engineering disciplines and ensuring cybersecurity solution alternatives Lead system design discussions and provide cybersecurity engineering input Lead and collaborate with systems engineers and developers to integrate cybersecurity considerations into system design Lead cybersecurity focused System Verification and Validation including writing test plans and procedures, performing test conduct, writing and conducting analyses, and providing remediation recommendations Own and generate cybersecurity related documentation (i.e., e.g.; Risk Management Framework System Security Plan, Risk Assessment Report, Plan of Actions and Milestones) Lead as part of a team of System Security Engineers, fostering a culture of collaboration and continuous learning Champion awareness of evolving security threats and industry best practices; becoming a Subject Matter Expert (SME) and valued member of our System Security Engineering team Qualifications You Must Have: Typically requires a degree in Science, Technology, Engineering or Mathematics (STEM) and minimum10  years prior relevant experience or an Advanced Degree in a related field and minimum 7 years of experience ACTIVE and transferable Secret U.S. government issued SECRET security clearance is required prior to start date U.S. citizenship is required , as only U.S. citizens are eligible for security clearances Experience in (system) requirement definition, allocation, and decomposition; preferably with embedded systems. Experience in generating Verification Items (VIs) and determining formal verification methods (inspection, analysis, demonstration, and/or test) for allocated requirements Experience with cybersecurity, Risk Management Framework (RMF), and embedded cryptography Experience with requirement management tools (e.g.; DOORS, JIRA, CONFLUENCE); including Model-Based Systems Engineering (MBSE) tools (e.g.; JAMA, CAMEO) Qualifications We Prefer: Active and transferable TOP SECRET clearance Familiarity with satellite systems, communication systems, and evolving security technologies; with a strong desire to develop and enhance this knowledge Direct experience with National Security Agency (NSA) cryptographic certification Direct experience with Program Protection Plan (PPP) and Program Protection Implementation Plan (PPIP) required by DoDI 5000.2 and DoDI 5200.39 Direct experience as an Agile Scrum Master and/or Product Owner Direct experience as a Cost Account Manager (CAM) and/or Basis of Estimate (BOE) author RTX Earned Value and Basis of Estimate Certifications; or the willingness to obtain these within six (6) months of start Cybersecurity-related certifications (e.g., CISSP, Security Plus, etc.) Self-starter requiring limited direction and minimal supervision What We Offer: Medical, dental, and vision insurance  Three weeks of vacation for newly hired employees  Generous 401(k) plan that includes employer matching funds and separate employer retirement contribution, including a Lifetime Income Strategy option  Tuition reimbursement program Student Loan Repayment Program  Life insurance and disability coverage  Optional coverages you can buy pet insurance, home and auto insurance, additional life and accident insurance, critical illness insurance, group legal, ID theft protection Birth, adop