Principal Systems Engineer (ONSITE)

Date Posted: 2026-07-24 | Location: El Segundo, CA | Onsite role. Active and transferable U.S. government-issued Secret security clearance required on day one; U.S. citizenship is mandatory.

About the Role

The Multi-Domain Assured Navigation & Timing Applications (MANTA) group within the Mission Critical Products organization is seeking a Principal Systems Engineer to support the Global Positioning System (GPS)-Based Positioning, Navigation and Timing Service (GPNTS) program. This role offers the opportunity to collaborate across disciplines and shape innovative solutions for the US Navy customer in a dynamic Maritime PNT environment.

Sign-on bonus eligible.

Responsibilities

• Develop verifiable system-level requirements.
• Create and execute test plans, verification, and acceptance test procedures.
• Develop scripts and configure/test equipment (e.g., GPS simulators) to verify system requirements and ensure compliance.
• Manage updates and timely release of CDRLs/SDRLs to improve documentation cycle time and customer satisfaction.
• Contribute to technical interchange meetings and design reviews (TRR, PDR, CDR).
• Provide verbal and written status updates on assigned Integrated Master Schedule (IMS) tasks.

Requirements

• Working knowledge of Model-Based Systems Engineering (MBSE).
• Experience in Agile development and tools such as JIRA/Confluence.
• Experience with DOORS NG.
• Familiarity with EVMS, ETCs, and ECPs.
• Experience in system, software, and hardware requirements management, traceability, and allocation.
• Experience in RF signal processing.
• Ability to visualize system functionality, create block diagrams, and analyze system performance via customer requirements specifications.
• Active and transferable U.S. government-issued security clearance (Secret) required prior to start date; U.S. citizenship is mandatory.
• Typically requires a degree in Science, Technology, Engineering, or Mathematics (STEM) and a minimum of 8 years of relevant experience, or an Advanced Degree in a related field with at least 5 years of experience.

Preferred Qualifications

• Minimum 5 years of experience in one or more of the following technical domains: RF/IR signal processing, electronics, navigation (GPS or Inertial), modeling and simulation (e.g., 6-DOF), aerodynamics, missile-related mechanical engineering (flight control systems, warheads, missile structures, seeker gimbals, RF/IR seeker subsystems).
• Understanding of guidance and navigation systems, with relevant experience in GPS Receiver system design, integration, test, verification, and validation.
• Experience with test equipment/tools, technical reviews, and production readiness.
• Familiarity with subsystem or systems architecting and system-of-systems definition.
• Familiarity with MOSA/SOSA/VITA/FACE standards.
• Ability to write clear engineering documentation.

Benefits

• Medical, dental, and vision insurance.
• Three weeks of vacation for newly hired employees.
• Generous 401(k) plan with 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: pet insurance, home and auto insurance, additional life and accident insurance, critical illness insurance, group legal, ID theft protection.
• Birth, adoption, and 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.

Pay

The salary range for this role is $118,300 – $224,900 USD. The range is a good faith estimate representative of all experience levels. RTX considers several factors when extending an offer, including role, function, responsibilities, work experience, location, education/training, and key skills.