Principal Systems Security Cyber Engineer - Contingent (Onsite - Aurora, CO) TS/SCI required

Prattwhitney; Aurora (CO); On-site; USD 108,000 - 205,000; Full time

Benefits offered by this job

Healthcare

Vacation

401(k)

Job summary

RTX is seeking a Principal Systems Security / Cyber Engineer to join the HBMAS SSE team in Aurora, CO. The role focuses on implementing robust security architectures and RMF-based controls to protect DoD/IC-grade systems, with travel up to CONUS/OCONUS.

A TS/SCI clearance is required and DoD A&A processes will be used. The candidate will work with AT, cryptography, SCRM, and cross-domain considerations to ensure secure product protection across programs.

Qualifications

• Requires STEM degree or higher and 5–8 years of relevant experience.
• Active TS/SCI clearance required prior to start date.
• DoDM 8140.03 compliant certification (Security+, CISSP or equivalent).
• Experience with RMF, ATO processes and NIST SP 800-37/53.

Responsibilities

• Implement security improvements by assessing current infrastructure and designing secure architectures.
• Develop RMF documents and validate ATOs and controls.
• Analyze cybersecurity data to identify vulnerabilities and track performance.
• Conduct audits to verify tool deployment and regulatory compliance.
• Collaborate with software and systems teams to harden the system.

Skills

Security engineering

RMF analysis

Threat assessment

Regulatory compliance

Independent worker

Education

STEM degree

Advanced degree

Tools

Docker

Kubernetes

Windows

Red Hat Linux

SIEM

Job description

Date Posted: 2026-10-09 Country: United States of America Location: US-CO-AURORA-S76 ~ 16430 E Hughes Dr ~ BLDG S76 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: TS/SCI - Current Security Clearance Status: Active and existing security clearance required on day 1 THIS ROLE IS CONTINGENT: Employment is based on contract award and customer funding.

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. Join our highly visible team and perform technically challenging assignments, which will closely contribute to protecting our nation and our products.

We are seeking a Principal Systems Security / Cyber Engineer to function as a key contributor for the Product Cybersecurity Organization (PCO) team. As a member of the High Band Mission Application Software (HBMAS) Systems Security Engineering (SSE) team, you will develop solutions to secure the Warfighter’s technical advantage. The SSE team creates comprehensive security solutions by leveraging multiple disciplines, including Anti-Tamper (AT), Software and Hardware Assurance, Cryptography, and Supply Chain Risk Management (SCRM), to implement robust program protection across various systems. This role will be worked onsite in Aurora, CO and requires an active TS/SCI clearance. Relocation assistance is not available.

What You Will Do

• Implement security improvements by assessing current infrastructure, evaluating threat trends, and designing secure architecture, system requirements, plans, and policies
• Advise, support junior engineers, and develop Risk Management Framework (RMF) documents and controls validation testing for Authorizations to Operate (ATOs)
• Analyze cybersecurity data metrics and technical test results to identify vulnerabilities and track security performance
• Conduct cybersecurity audits to evaluate security posture, verify proper tool implementation, and ensure regulatory compliance
• Advise and work with the Software Engineering and/or System Engineering teams to implement cybersecurity policies, harden the system, and document findings
• CONUS/OCONUS travel (up to 25%)

What You Will Learn

• You will enhance your leadership capabilities and systems security engineering expertise, gaining specialized skills that will differentiate you in the industry
• You will gain valuable experience and career development opportunities as a Sr. Principal Systems Security Engineer, with a defined pathway toward Tech Fellow or Chief Security Engineer
• You will develop deep technical expertise to become a cybersecurity subject matter expert (SME), while gaining valuable exposure to multiple business models and product lines in a dynamic, ever-evolving field
• We are growing and so can you!

Qualifications You Must Have

• 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 experience
• U.S. citizenship is required, as only U.S. citizens are eligible for a security clearance
• Active and transferable TS/SCI U.S. government issued security clearance is required prior to start date
• DoDM 8140.03 compliant certification (e.g., Security+, CISSP, or equivalent)
• Experience analyzing operating system security features and vulnerabilities in compliance with Intelligence Community (IC) standards
• Experience with embedded systems security (real-time embedded systems architecture)
• Experience in systems engineering requirements and specifications, including implementing Federal and DoD Assessment and Authorization (A&A) processes, cyber security controls, and Risk Management Framework (RMF) documentation in accordance with NIST Special Publication (SP) 800-37, NIST SP 800-53, and DoD Instruction 8510.01
• Experience in security systems engineering across hardware, software, and application solutions in both standalone and LAN/WAN configurations

Qualifications We Prefer

• Familiar with Program Protection Plans (PPP), DoDI 5000.02, and DoDI 5200.39
• Experience working on U.S. Government contract proposals as a Cybersecurity Engineering subject matter experienced professional
• Familiar with cloud and/or virtualization technologies
• Familiar with Containerization (e.g., Docker/Kubernetes)
• Familiar with Cross Domain Solutions (CDS)
• Experience with IT, network, and system security administration, including security configuration and account management best practices for Windows, UNIX, Red Hat Enterprise Linux, and Cisco Systems
• Experience utilizing information security toolsets, including anti-virus, vulnerability assessment, HIDS/NIDS, host-based and endpoint security, Multi-Factor Authentication (MFA), Security Information and Event Management (SIEM), and centralized auditing resources
• Written and verbal communications skills, with the ability to work independently

What 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
• 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!

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.

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.

RTX is an aerospace and defense company that provides advanced systems and services for commercial, military and government customers worldwide. It comprises three industry-leading businesses – Collins Aerospace, Pratt & Whitney, and Raytheon. Its 195,000 employees enable the company to operate at the edge of known science as they imagine and deliver solutions that push the boundaries in quantum physics, electric propulsion, directed energy, hypersonics, avionics and cybersecurity. The company, formed in 2020 through the combination of Raytheon Company and the United Technologies Corporation aerospace businesses, is headquartered in Arlington, Virginia.