Sr. Embedded System Security Engineer (Onsite - Marlborough, MA) Secret clearance required

Date Posted: 2026-10-28 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 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 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 System Security Engineering and work collaboratively with cross-functional engineering teams on the program they support. This role will be worked onsite in Marlborough, MA. and will require an active SECRET clearance. Relocation assistance is available.  What You Will Do: Support system certification and accreditation efforts, including Risk Management Framework (RMF) Authorization To Operate (ATO) and National Security Agency (NSA) Type 1 Cryptographic Certification Support 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 Qualifications You Must Have: Typically requires a degree in Science, Technology, Engineering or Mathematics (STEM) and minimum 5 years prior relevant experience or an Advanced Degree in a related field and minimum 3 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 Experience with analytics to perform deep dives into system requirements Experience interpreting system models, diagrams, and architectures to assess security risks Qualifications We Prefer: 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 What We Offer: Some of our competitive benefits package includes:     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 disa