Principal Embedded Systems Security Engineer (Onsite - Marlborough, MA) Secret clearance required

RTX; Marlborough (MA); On-site; USD 140,000 - 200,000; Full time

Benefits offered by this job

Medical benefits

3 weeks vacation

401(k) plan with matching

Tuition reimbursement

Student loan repayment

Life insurance

Job summary

RTX's Collins Aerospace unit in Marlborough, MA is seeking a Principal Embedded System Security Engineer to support DoD programs and secure embedded systems.

You will work with multidisciplinary teams to implement RMF processes, perform risk assessments, and help certify systems for national security. The role is onsite at a US facility with opportunities to influence product cybersecurity across contracts.

Qualifications

• Degree in STEM with 8+ years experience, or advanced degree with 5+ years.
• U.S. citizenship and active SECRET clearance required.
• Experience with RMF applied to DoD mission systems.
• Ability to develop security documentation and interpret system models.
• Familiarity with DoD security tools and SBUs; advanced security certifications desirable.

Responsibilities

• Support RMF ATO and NSA Type 1 cryptographic certification for programs.
• Decompose, allocate, implement, and verify cybersecurity requirements.
• Analyze system models/diagrams to identify security vulnerabilities.
• Participate in design discussions and provide security engineering input.
• Collaborate with systems engineers to integrate security into design.
• Maintain awareness of evolving threats and best practices.
• Contribute to Security focused System Verification and Validation including test plans, procedures, and remediation analysis.

Job description

Date Posted: 2026-09-30 Country: United States of America

Location: US-MA-MARLBOROUGH-MA1 ~ 1001 Boston Post Rd ~ BLDG 1

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.

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 Principal 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.

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 a minimum of 8 years of prior relevant experience, or an Advanced Degree in a related field and a minimum of 5 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 with Risk Management Framework (RMF) applied to mission systems used in disconnected DoD environments. Familiarity with general technical security concepts, technologies, and implementations.
• Technical writing skills and ability to develop security documentation.
• 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)
• Willingness to learn about satellite systems, communication systems, and evolving security
• Experience in at least two of the following areas: Systems Engineering, Test Engineering, Software Engineering, Mechanical Engineering, Electrical Engineering
• Exemplifies the RTX leadership behavior including collaboration, effective communications, courage, customer focus, develops talent, drives results, instills trust
• 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
• 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.

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 illnessinsurance, group legal, ID theft protection
• Birth, adoption, parental leave benefits
• Ovia Health, fertility, and family planning
• Adoption Assistance
• Autism BenefitEmployee 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!

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