Principal Embedded Systems Security Engineer (Hybrid - Largo, FL) Secret clearance required

Collins Aerospace; Largo (FL); Hybrid; USD 123,000 - 205,000; Full time

Benefits offered by this job

Medical, dental, and vision insurance

Three weeks of vacation

401(k) plan with employer matching

Job summary

Collins Aerospace, within RTX, seeks a Principal Embedded Systems Security Engineer to support DoD East Florida programs in a hybrid Largo, FL setting. You will lead RMF/ATO activities, decompose cybersecurity requirements, and coordinate across engineering teams to secure embedded defense systems.

Active SECRET clearance is required. The role emphasizes system-level analysis, security documentation, and SV&V, with collaboration across software, hardware, and test disciplines.

Qualifications

• 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 performing or leading cybersecurity or product security engineering activities for embedded, aerospace, defense, or other mission-critical systems
• Experience applying Risk Management Framework (RMF) processes to system certification, authorization, or security assessment activities
• Experience developing and reviewing technical security documentation, including security requirements, security assessments, certification artifacts, and verification documentation
• Experience decomposing, allocating, implementing, and verifying cybersecurity requirements across system architectures, interfaces, and components
• Experience leading or coordinating security-focused system verification and validation activities, including development of test strategies, test plans, procedures, test conduct, results analysis, and remediation recommendations
• Experience coordinating cybersecurity engineering activities across systems engineering, software, hardware, and test organizations

Responsibilities

• Lead RMF Authorization to Operate (ATO) and NSA Type 1 Cryptographic Certification activities, including planning, development and review of security documentation, assessment evidence, findings, and remediation activities
• Lead cybersecurity requirement decomposition, allocation, implementation, and verification across system-level architectures, interfaces, and major system components
• Perform system-level analysis of requirements, models, interfaces, and architectures to identify security vulnerabilities and establish security requirements, mitigations, and verification methods
• Lead security engineering participation in system design reviews and document system-level security risks, technical recommendations, and required corrective actions
• Lead integration of security requirements across systems engineering, software, hardware, and test disciplines and track security issues through implementation, verification, and closure
• Lead security-focused SV&V activities, including development of test strategies, test plans, test procedures, test cases, test conduct, results analysis, and remediation recommendations
• Coordinate cybersecurity engineering activities across multiple engineering disciplines and resolve security issues affecting system requirements, architecture, design, implementation, and verification
• Evaluate security threats, vulnerabilities, technologies, and applicable security guidance and determine impacts to system architectures, requirements, and certification activities
• Provide technical direction to other security engineers and review security engineering products, analyses, and verification results for assigned systems

Skills

RMF & ATO planning

Cybersecurity requirements

System architecture analysis

Security testing & verification

Cross-disciplinary coordination

Education

STEM degree

Advanced degree

Tools

DOORS

JIRA

Confluence

Cameo MBSE

Job description

Location: US-FL-LARGO-382SR ~ 7887 Bryan Dairy Rd ~ BLDG 600

Date Posted: 2026-08-24

Country: United States of America

Position Role Type: Hybrid

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. 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 Principal Embedded Systems 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 proficient 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 hybrid in Largo, FL; days onsite pending business needs. Requires an active SECRET clearance. Relocation assistance is available.

What You Will Do:

• Lead RMF Authorization to Operate (ATO) and NSA Type 1 Cryptographic Certification activities, including planning, development and review of security documentation, assessment evidence, findings, and remediation activities
• Lead cybersecurity requirement decomposition, allocation, implementation, and verification across system-level architectures, interfaces, and major system components
• Perform system-level analysis of requirements, models, interfaces, and architectures to identify security vulnerabilities and establish security requirements, mitigations, and verification methods
• Lead security engineering participation in system design reviews and document system-level security risks, technical recommendations, and required corrective actions
• Lead integration of security requirements across systems engineering, software, hardware, and test disciplines and track security issues through implementation, verification, and closure
• Lead security-focused SV&V activities, including development of test strategies, test plans, test procedures, test cases, test conduct, results analysis, and remediation recommendations
• Coordinate cybersecurity engineering activities across multiple engineering disciplines and resolve security issues affecting system requirements, architecture, design, implementation, and verification
• Evaluate security threats, vulnerabilities, technologies, and applicable security guidance and determine impacts to system architectures, requirements, and certification activities
• Provide technical direction to other security engineers and review security engineering products, analyses, and verification results for assigned systems

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 performing or leading cybersecurity or product security engineering activities for embedded, aerospace, defense, or other mission-critical systems
• Experience applying Risk Management Framework (RMF) processes to system certification, authorization, or security assessment activities
• Experience developing and reviewing technical security documentation, including security requirements, security assessments, certification artifacts, and verification documentation
• Experience decomposing, allocating, implementing, and verifying cybersecurity requirements across system architectures, interfaces, and components
• Experience analyzing system requirements, models, diagrams, interfaces, and architectures to identify security risks and develop security requirements and mitigation strategies
• Experience leading or coordinating security-focused system verification and validation activities, including development of test strategies, test plans, procedures, test conduct, results analysis, and remediation recommendations
• Experience coordinating cybersecurity engineering activities across systems engineering, software, hardware, and test organizations

Qualifications We Prefer:

• Active and transferable TOP SECRET clearance
• Extensive experience with NSA cryptographic certification, Cross Domain Solution (CDS) requirements, and NIAP
• Advanced experience with DOORS, JIRA, Confluence, Cameo (MBSE), or other systems modeling and agile tools
• Advanced Security-related certifications (e.g., CISSP) and/or an Electrical or Computer Engineering degree
• Extensive experience with security protocols used in embedded systems and communications for aerospace environments
• Experience leading the use of DoD-focused security assessment tools such as SCC, NMAP, Evaluate-STIG, Nessus, ACAS, Vulnerator, eMASS, etc
• Experience with satellite systems, communication systems, and complex mission-critical embedded systems
• Experience providing technical direction and mentoring to other security engineers
• Demonstrated ability to lead security efforts across multidisciplinary engineering teams, resolve complex technical issues, and drive results
• Demonstrated ability to communicate complex security risks and recommendations to engineering, program, and customer leadership

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 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!

Hybrid

Employees who are working in Hybrid roles will work regularly both onsite and offsite. Ratio of time working onsite will be determined in partnership with your leader.

The salary range for this role is 107,500 USD - 204,500 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.