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

Job ID: 01868063Posted: Posted TodayStart Date: 2026-08-19Location: US-MA-MARLBOROUGH-MA4 ~ 1001 Boston Post Rd ~ BLDG 4; US-FL-LARGO-382SR ~ 7887 Bryan Dairy Rd ~ BLDG 600Country: United States of AmericaTime Type: Full timeDate 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 1Raytheon Company, Managed by Collins AerospaceAt 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 technologiesDefine cybersecurity requirements, design, and architecture artifacts; collaborating with program and engineering disciplines and ensuring cybersecurity solution alternativesLead system design discussions and provide cybersecurity engineering inputLead and collaborate with systems engineers and developers to integrate cybersecurity considerations into system designLead cybersecurity focused System Verification and Validation including writing test plans and procedures, performing test conduct, writing and conducting analyses, and providing remediation recommendationsOwn 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 learningChampion awareness of evolving security threats and industry best practices; becoming a Subject Matter Expert (SME) and valued member of our System Security Engineering teamQualifications 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 experienceACTIVE 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 clearancesExperience 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 requirementsExperience with cybersecurity, Risk Management Framework (RMF), and embedded cryptographyExperience 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 clearanceFamiliarity with satellite systems, communication systems, and evolving security technologies; with a strong desire to develop and enhance this knowledgeDirect experience with National Security Agency (NSA) cryptographic certificationDirect experience with Program Protection Plan (PPP) and Program Protection Implementation Plan (PPIP) required by DoDI 5000.2 and DoDI 5200.39Direct experience as an Agile Scrum Master and/or Product OwnerDirect experience as a Cost Account Manager (CAM) and/or Basis of Estimate (BOE) authorRTX Earned Value and Basis of Estimate Certifications; or the willingness to obtain these within six (6) months of startCybersecurity-related certifications (e.g., CISSP, Security Plus, etc.)Self-starter requiring limited direction and minimal supervisionWhat 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 programStudent 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 protectionBirth, adoption, parental leave benefitsOvia Health, fertility, and family planning Adoption Assistance          Autism Benefit Employee Assistance Plan, including up to 10 free counseling sessions Healthy You Incentives, wellness rewards programDoctor on Demand, virtual doctor visits Bright Horizons, child and elder care servicesTeladoc Medical Experts, second opinion program And more! Learn More & Apply Now!Collins Aerospace, an RTX company, is a leader in technologically advanced and intelligent solutions for the global aerospace and defense industry. Collins Aerospace has the capabilities, comprehensive portfolio, and expertise to solve customers’ toughest challenges and to meet the demands of a rapidly evolving global market. Collins Aerospace makes modern flight possible. Of course, that wouldn’t be possible without the capabilities and technologies of our organization, as well as our engineers – a highly skilled, accomplished network that spans more than 180 sites, 24 countries and 6 Strategic Business Units (SBUs). Our industry-leading experts are setting the standards for the aerospace industry and paving the way for the future. But as new challenges present themselves, we need fresh, creative and motivated minds to overcome these hurdles, help us break barriers and achieve new levels of innovation. Do you have what it takes to join a global organization that doesn’t shy away from big opportunities? If so, we invite you to join our ranks and create the next generation of aerospace technologies. Together, we will nurture an engineering culture that values intellectual curiosity, risk takers and integrity. A place where we will challenge ourselves, our teams, and the status quo and where we will work to find a way – the right way – to achieve what others can only dream of. * Please consider the following role type definitions as you apply for this role.Onsite: Employees who are working in Onsite roles will work primarily onsite. This includes all production and maintenance employees, as they are essential to the development of our products.As part of our commitment to maintaining a secure hiring process, candidates may be asked to attend select steps of the interview process in-person at one of our office locations, regardless of whether the role is designated as on-site, hybrid or remote.The salary range for this role is 132,400 USD - 251,600 USD. The salary range provided is a good faith estimate representative of all experience levels. RTX considers several factors when extending an offer, including but not limited to, the role, function and associated responsibilities, a candidate’s work experience, location, education/training, and key skills.Hired applicants may be eligible for benefits, including but not limited to, medical, dental, vision, life insurance, short-term disability, long-term disability, 401(k) match, flexible spending accounts, flexible work schedules, employee assistance program, Employee Scholar Program, parental leave, paid time off, and holidays. Specific benefits are dependent upon the specific business unit as well as whether or not the position is covered by a collective-bargaining agreement.Hired applicants may be eligible for annual short-term and/or long-term incentive compensation programs depending on the level of the position and whether or not it is covered by a collective-bargaining agreement. Payments under these annual programs are not guaranteed and are dependent upon a variety of factors including, but not limited to, individual performance, business unit performance, and/or the company’s performance.This role is a U.S.-based role. If the successful candidate resides in a U.S. territory, the appropriate pay structure and benefits will apply.RTX anticipates the application window closing approximately 40 days from the date the notice was posted. However, factors such as candidate flow and business necessity may require RTX to shorten or extend the application window.RTX is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, age, disability or veteran status, or any other applicable state or federal protected class. RTX provides affirmative action in employment for qualified Individuals with a Disability and Protected Veterans in compliance with Section 503 of the Rehabilitation Act and the Vietnam Era Veterans’ Readjustment Assistance Act. Privacy Policy and Terms:Click on this link to read the Policy and Terms