Date Posted:2025-10-28Country:United States of AmericaLocation:MA801: Marlborough, MA 1001 Boston Post Road Building 2, Marlborough, MA, 01752 USAPosition Role Type:OnsiteU.S. Citizen, U.S. Person, or Immigration Status Requirements: The ability to obtain and maintain a U.S. government issued security clearance is required.​ U.S. citizenship is required, as only U.S. citizens are eligible for a security clearanceSecurity Clearance: DoD Clearance: SecretRaytheon Company, Managed by Collins AerospaceCollins Aerospace, an RTX company, is seeking a highly skilled Principal Systems Security Engineer (PSSE) to drive cybersecurity initiatives, ensure compliance with security frameworks, and support embedded systems and systems engineering (SE) efforts. This is not an IT or programming role—instead, this is an embedded cybersecurity role that focuses on technical writing, system security analysis, and requirements assessment. This role requires a strong leader who can interface with customers, guide teams, and contribute to the security posture of mission-critical systems.What You Will Do     • Lead cybersecurity efforts for embedded systems, ensuring compliance with NIST RMF security controls, and NSA security requirements     • Develop, interpret, and document security requirements for complex systems engineering (SE) environments     • Support Model-Based Systems Engineering (MBSE) efforts, ensuring security requirements are incorporated into system models     • Work with requirements management tools (e.g., DOORS, JIRA, Cameo) to track, validate, and verify security requirements     • Collaborate with systems engineers and developers to integrate security controls into embedded systems and software architectures; As well as verification engineers to develop test methods and procedures for formal cybersecurity requirement verification     • Perform security testing and validation for embedded systems, including automated vulnerability scanning     • Conduct security risk assessments and develop mitigation strategies tailored to embedded environments     • Provide technical leadership, mentoring team members and ensuring adherence to security best practices     • Perform cost account management, cybersecurity program planning, and serve as the System Security Engineering liaison to engineering leadership and program management     • Participate in proposal writing and development, crafting security solutions for bids and working in proposal teamsQualifications You Must Have     • Experience leading security efforts for embedded systems and mission-critical software     • Strong knowledge of NIST RMF SP 800-53, NSA security requirements, and risk management frameworks     • Experience with systems engineering processes, including modeling, requirements management, traceability, and verification     • Familiarity with requirements management tools (e.g., DOORS, JIRA, Cameo) and model-based security approaches     • Experience with security risks and attack vectors specific to embedded systems, such as firmware vulnerabilities and hardware-level threats     • Ability to perform security testing and validation, including automated vulnerability scanning     • Strong proposal writing experience, with the ability to articulate security solutions in proposals and RFP responses     • Excellent communication and leadership skills, capable of interfacing with customers and guiding teams     • Typically requires a degree in Science, Technology, Engineering or Mathematics (STEM) and minimum 8 years prior relevant experience or an Advanced Degree in a related field and minimum 5 years of experienceQualifications We Prefer     • CISSP certification (or ability to obtain within six months)     • Experience with security assessments and risk analysis for embedded systems     • Experience with earned value management and cost account management     • Familiarity with secure software development and integration in real-time or safety-critical environments     • Knowledge of supply chain security risks in embedded system development     • Active Top Secret security clearanceWhat 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, adoption, parental leave benefits      • Ovia 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     • This position is eligible for relocation assistance     • And more!  Learn More &amp; Apply Now! Do you want to be a part of something bigger? A team whose impact stretches across the world, and even beyond? At Collins Aerospace, our Mission Systems team helps civilian, military and government customers complete their most complex missions — whatever and wherever they may be. Our customers depend on us for intelligent and secure communications, missionized systems for specialized aircraft and spacecraft and collaborative space solutions. By joining our team, you’ll have your own critical part to play in ensuring our customer succeeds today while anticipating their needs for tomorrow. Are you up for the challenge? Join our mission today. *Please ensure the role type (defined below) is appropriate for your needs before applying to 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.  At Collins, the paths we pave together lead to limitless possibility. And the bonds we form – with our customers and with each other -- propel us all higher, again and again.     Apply now and be part of the team that’s redefining aerospace, every day.  Employee Referral EligibleAs 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 101,000 USD - 203,000 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 <a target="_blank" href="http://www.rtx.com/privacy/Job-Applicant-Privacy-Notice">link</a> to read the Policy and Terms