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

VulnU; Marlborough (MA); On-site; USD 87,000 - 165,000; Full time

Benefits offered by this job

Medical, dental, vision insurance

3 weeks vacation

401(k) match

Tuition reimbursement

Job summary

Collins Aerospace, an RTX company, is seeking a Sr. Embedded System Security Engineer for onsite work in Marlborough, MA. Active SECRET clearance and U.S.

citizenship are required. You will support system certification, analyze security risks, and collaborate with cross-functional teams to embed security into designs for defense programs. The role emphasizes RMF/ATO processes, cybersecurity test and evaluation, and ongoing threat mitigation in a DoD/disconnected environment.

Qualifications

• Degree in Science, Technology, Engineering or Mathematics (STEM) or advanced related degree.
• Active SECRET clearance required before start date.
• Direct experience in System Security Engineering.
• RMF applied to DoD mission systems/environments.
• Ability to develop security documentation and write technical reports.

Responsibilities

• Support RMF ATO and NSA Type 1 cryptographic certification processes.
• Decompose and allocate security requirements, implement and verify.
• Analyze system models/diagrams to identify security vulnerabilities.
• Participate in system design discussions and provide security input.
• Collaborate with systems engineers to integrate security into designs.
• Maintain awareness of evolving threats and industry best practices.
• Develop security test plans, perform validation, and propose remediation.

Skills

System security engineering

RMF

Security analyses

Technical writing

Security requirements

Education

STEM degree

Advanced degree

Tools

DOORS

JIRA

Confluence

Cameo MBSE

Nessus

ACAS

NMAP

Job description

# Sr. Embedded System Security Engineer (Onsite - Marlborough, MA) Secret clearance requiredRTX · rtx.comCategory: Hardware & Embedded SecurityLocation: US-MA-MARLBOROUGH-MA4 ~ 1001 Boston Post Rd ~ BLDG 4Level: SeniorClearance: Secret## Quality of lifeWhat the posting states. Hover or tap a perk to see the line it came from.* Paid parental leave* Retirement match* Learning budget* 30 days PTODate Posted:2026-10-28Country:United States of AmericaLocation:US-MA-MARLBOROUGH-MA4 ~ 1001 Boston Post Rd ~ BLDG 4Position Role Type:OnsiteU.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 clearanceSecurity Clearance Type:Secret - CurrentSecurity Clearance Status:Active and existing security clearance required on day 1At 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 andcompetitive 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 CertificationSupport cybersecurity requirement decomposition, allocation, implementation, and verification utilizing system engineering practices. Analyze system requirements, models, and diagrams to identify potential security vulnerabilitiesParticipate in system design discussions and provide security engineering inputCollaborate with systems engineers and developers to integrate security considerations into system designWork as part of a team, contributing to a culture of collaboration and continuous learningMaintain awareness of evolving security threats and industry best practicesParticipate 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 experienceActive 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 clearanceDirect experience in System Security EngineeringExperience with Risk Management Framework (RMF) applied to mission systems used in disconnected DoD environments.Experience with general technical security concepts, technologies, and implementationsTechnical writing skills and ability to develop security documentationExperience with analytics to perform deep dives into system requirementsExperience 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 EngineeringFamiliarity with DOORS, JIRA, Confluence, Cameo (MBSE experience), or other systems modeling and agile toolsAdvanced Security-related certifications (e.g., CISSP, Sec , etc.) and Electrical or Computer Engineering DegreePrior experience working with security protocols used in embedded systems and communications for aerospace environmentsFamiliarity 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 technologiesExemplifies 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 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, adoption, parental leave benefits Carrot Health, fertility, and family planning Adoption Assistance Autism Benefit Employee Assistance Plan, including up to 10 free counseling sessions Healthy You Incentives, wellness rewards program Doctor on Demand, virtual doctor visits Bright Horizons, child and elder care services Teladoc 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 ensure the role type (defined below) is appropriate for your needs before applying to this role. This position is classified as: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 86,800 USD - 165,200 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.