Principal System Security Engineer - P4 (Onsite-Fullerton, CA)

Company: RTX
Location: Fullerton
Posted on: April 1, 2026

Job Description:

Date Posted: 2026-02-27 Country: United States of America Location: US-CA-FULLERTON-675 ~ 1801 Hughes Dr ~ BLDG 675 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 At Raytheon, the foundation of everything we do is rooted in our values and a higher calling – to help our nation and allies defend freedoms and deter aggression. We bring the strength of more than 100 years of experience and renowned engineering expertise to meet the needs of today’s mission and stay ahead of tomorrow’s threat. Our team solves tough, meaningful problems that create a safer, more secure world. Raytheon is seeking a well-qualified Principal System Security Engineer (Cyber) - P4 to join our elite Systems Security Engineering (SSE) team in developing solutions to protect the Warfighter’s technology advantage. Systems Security Engineering creates holistic security solutions leveraging Cyber Security, Software Assurance and Supply Chain Risk Management to support Program Protection Implementation on embedded weapons systems. Join our highly visible team and perform technically challenging assignments, which will directly contribute to protecting our nation and our Warfighters. This is an onsite position at Raytheon in Fullerton, CA. What You Will Do Interact with the customer to define SSE requirements, solutions, trades, costs, implementation, system impacts, and effectiveness Develop plans and estimates, task execution, project tracking, reporting, and risk identification and mitigation plans Ensure compliance with National Institute of Standards and Technology (NIST) Risk Management Framework (RMF) controls. Consult and assist program management with SSE architecture and issues Support the development of bids and proposals Define security development and test efforts implementation of security controls of networking devices, databases, operating systems, and hardware and software component Integrate cybersecurity development activities Develop top-level system requirements and flow down requirements and implementation concepts to subsystem Understand and comply with DoD technology release and export licensing policies Qualifications You Must Have Typically requires a Bachelor’s Degree in Science, Technology, Engineering or Mathematics (STEM) and 8 years of prior relevant experience Active and transferable U.S. government issued Secret security clearance is required prior to start date. U.S. citizenship is required, as only U.S. citizens are eligible for a security clearance Experience in System Security Engineering, computer technology reverse engineering, program protection, cybersecurity or embedded security Experience in generating systems requirements, design and architecture artifacts, plans and/or policies Experience in designing, implementing, testing and fielding real-time embedded security-oriented solutions on Department of Defense (DoD) programs with secure systems technologies, methodologies, policies and guidelines Experience in using and configuring Red Hat Enterprise Linux operating systems Experience in leading or managing teams Qualifications We Prefer Experience in designing, implementing, testing and fielding real-time embedded security-oriented solutions on Department of Defense (DoD) programs with secure systems technologies, methodologies, policies and guidelines Usage of information security toolsets including anti-virus, Vulnerability Assessment, HIDS/ NIDS. host-based or endpoint security solutions, Multi-Factor Authentication (MFA), and Security Incident and Event Management (SIEM) and centralized auditing tools familiarity with Splunk is preferred Linux Bash scripting or Python scripting experience Security systems engineering involving various computer hardware and software S/W operating system and application solutions in both a stand-alone and in LAN/WAN configurations DoDI 8570.01-M IAT Level-II Compliant Certification (e.g. Security, CISSP, or equivalent) Security features and/or vulnerability analysis of various operating systems as defined by Intelligence agencies Experience with IT and/or network and system security administration, including operating system security configuration and account management best practices for UNIX, MS Windows, Red Hat Enterprise Linux, or CISCO systems Understanding of Systems Engineering requirements, specifications, and Experience implementing DoD and Federal IA Certification and Accreditation Processes, IA controls and developing and maintaining associated certification and accreditation documentation Familiar with Program Protection Plan (PPP) required by DoDI 5000.02 and DoDI 5200.39 Experience working on U.S. Government contract proposals as an Information Assurance Engineer subject matter expert What We Offer Our values drive our actions, behaviors, and performance with a vision for a safer, more connected world. At RTX we value: Trust, Respect, Accountability, Collaboration, and Innovation Relocation Eligible – Relocation assistance is available 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 118,300 USD - 224,900 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 link to read the Policy and Terms

Keywords: RTX, Gardena , Principal System Security Engineer - P4 (Onsite-Fullerton, CA), IT / Software / Systems , Fullerton, California