Principal Systems Engineer

Date Posted: 2026-07-24 | Location: Aurora, CO (onsite) | U.S. citizenship required; active and transferable DoD Secret security clearance required on day 1.

About the Role

We have an exciting opportunity for a Principal Systems Engineer – Modeling, Simulation & Analysis supporting one of our premier programs within Raytheon, an RTX Business. In this role, you will collaborate across integrated product teams consisting of Guidance, Navigation & Control (GNC), Signal Processing, and Performance Simulation engineers to develop and evaluate high-fidelity simulation environments supporting mission-critical defense capabilities.

Responsibilities

• Develop high-fidelity models and simulations to support missile design, performance assessment, and flight test activities.
• Design, develop, and implement modeling and simulation solutions while conducting trade studies and evaluating system and subsystem performance.
• Collaborate with Guidance, Navigation & Control (GNC), Signal Processing, and Systems Engineering teams to execute simulation activities in support of program objectives and schedules.
• Analyze simulation results and provide technical recommendations that influence system architecture and design decisions.
• Support product development throughout the entire lifecycle, from initial concept through fielded deployment.
• Provide technical leadership and guidance to engineering teams while supporting design reviews, technical interchange meetings, and customer engagements.
• Contribute to the development of technology roadmaps and innovative modeling solutions that support future mission capabilities.

Requirements

• Bachelor's Degree in Engineering, Science, Physics, Mathematics, or another STEM discipline and a minimum of 8 years of prior relevant experience.
• Experience applying object-oriented software design and programming using C or C++.
• Experience using Python or MATLAB to analyze engineering data and evaluate system performance.
• Experience developing models or simulations of physical systems and applying modeling, simulation, statistical analysis, or engineering analysis to evaluate system solutions.
• Active and transferable DoD Secret U.S. government-issued security clearance is required prior to start date, with the ability to obtain Special Program Access after start.
• U.S. citizenship is required, as only U.S. citizens are eligible for a security clearance.

Preferred Qualifications

• Advanced Degree in Engineering, Science, Mathematics, or another STEM discipline.
• Experience applying systems engineering principles within multi-disciplinary engineering teams.
• Experience developing and presenting technical briefings to customers and engineering leadership.
• Experience developing Guidance, Navigation & Control (GNC) algorithms, signal processing algorithms, or missile performance models.
• Experience with control hardware design, hardware/software integration, or systems integration and test.
• Experience modeling flight dynamics, physics-based systems, or missile performance characteristics.
• Experience working in UNIX or Linux environments and using software configuration management tools such as Git.
• Coursework or experience in radar, signal and image processing, EO/IR systems, digital communications, probability and statistics, linear algebra, estimation theory, optimal control, system architecture, inertial navigation, or guidance theory.

Benefits

• Medical, dental, and vision insurance.
• Life insurance, short-term disability, and 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.
• Annual short-term and/or long-term incentive compensation programs (eligibility dependent on role level and collective-bargaining agreement).

Pay

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.