> Markdown version of [/jobs/ext/3186221-principal-systems-engineer-gnc-analyst-onsite](https://www.wearedevelopers.com/jobs/ext/3186221-principal-systems-engineer-gnc-analyst-onsite). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md).

---

# Principal Systems Engineer (GNC Analyst) (Onsite)

- **Company:** RTX
- **Location:** Pasadena, CA, United States
- **Experience:** Expert
- **Salary:** $118,300.0 - $224,900.0
- **Contract:** Permanent contract
- **Skills:** C (Programming Language), Systems Engineering, MATLAB, Microsoft PowerPoint, Signal Processing, Simulink, Systems Integration, Model Validation
- **Published:** September 1, 2026
- **Apply:** https://www.clearancejobs.com/jobs/9050840/principal-systems-engineer-gnc-analyst-onsite

## About the Role

* Typically requires a Bachelor's in Science, Technology, Engineering, or Mathematics (STEM preferred) and a minimum of 8 years of prior engineering experience.
 * Experience in Matlab , Simulink and the C programming language.
 * Experience in signal processing
 * Experience developing clear and adaptable models of complex electromechanical systems.
 * Experience delivering professional presentations.
 * Experience with high-bandwidth mechatronics and dynamics.
 * Experience in the research and development of precision pointing systems.
 * Experience working directly with external vendors and hardware suppliers.
 * An active and transferable TS/SCI CI Poly U.S. government issued is required prior to start date. U.S. citizenship is required, as only U.S. citizens are eligible for the required security clearance.

Qualifications We Prefer

 * Work in a complex multi-task, schedule-driven environment.
 * Perform effectively with minimal day-to-day oversight
 * Advanced degree

## Description

* This role is critical for the risk reduction and requirement-definition phase of the project's mechanisms. High-fidelity modeling of electromechanical actuators and sensors is required to validate designs against testbed data and to inform the specifications of future hardware iterations.
 * Distill complex models into low-fidelity versions for integration into larger system-level simulations.
 * Provide rapid-turnaround study results for sponsors and maintaining long-term, high-fidelity simulation infrastructure.
 * Responsibilities include, but are not limited to:
 * High-Fidelity Modeling: Maintain, modify, and develop high-fidelity behavioral simulations of electromechanical actuators and sensors.
 * Model Validation: Tune and validate simulations against actual testbed data to ensure physical accuracy.
 * Risk Reduction & Requirements: Utilize high-fidelity models to conduct risk reduction activities and establish technical requirements for future versions of mechanisms.
 * System Integration: Create and maintain low-fidelity "surrogate" models that approximate actuator behavior for use in larger, integrated system simulations.
 * Study Support: Execute rapid-turnaround tasks (2-3-week cycles) to support sponsor-driven studies, delivering results via plots and presentations.
 * Simulation Maintenance: Provide ongoing maintenance and updates to the project's primary simulation environment to ensure stability for other project stakeholders.
 * Vendor Technical Integration: Participate in vendor meetings and technical reviews to absorb critical design information, ensuring that behavioral models accurately reflect external hardware and software specifications.
 * Technical Versatility: Act as a flexible resource within a small team, providing overlap and support for other GNC functions as bandwidth requires.
 * Communication: Translate complex simulation data into clear, concise plots and PowerPoint presentations for internal and external stakeholders.