> Markdown version of [/jobs/ext/3629343-principal-systems-engineer-onsite](https://www.wearedevelopers.com/jobs/ext/3629343-principal-systems-engineer-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 (Onsite)

- **Company:** RTX
- **Location:** Pasadena, CA, United States
- **Experience:** Expert
- **Salary:** $118,300.0 - $224,900.0
- **Contract:** Permanent contract
- **Skills:** Agile Methodology, Data Analysis, Systems Engineering, Systems Architecture, System Testing, Test Data
- **Published:** October 8, 2026
- **Apply:** https://www.clearancejobs.com/jobs/9224373/principal-systems-engineer-onsite

## About the Role

* Typically requires a Bachelor's degree in Science, Technology, Engineering, or Mathematics (STEM preferred) and a minimum of 8 years of prior engineering experience.

 * Experience with CONOPS development, requirements development/sell-off, test planning, and/or test data review.

 * An active and transferable TS/SCI 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 the required security clearance., * Experience communicating technical details with stakeholders, both internal and external organizations.
 * Experience working with government customers.
 * Experience running a small team (1-3 others) to execute a test.
 * Experience with data analysis and Agile concepts.

## Description

* Stakeholder & Customer Interface: Interface with various stakeholders and customers to understand their needs and identify appropriate system solutions for a specific domain area.
 * Working Group Leadership: Run a working group to host technical discussions and align system solutions.
 * Architecture Development: Develop CONOPs (Concepts of Operations) and system architecture for new capabilities.
 * Trade Studies: Run trade studies to identify and recommend the best options, considering technical, cost, and schedule constraints.
 * Status & Risk Monitoring: Monitor and understand the status and risk of capabilities currently in development.
 * Reporting: Communicate status and risk to stakeholders and customers on a regular basis.
 * Capability Development: Interface with various stakeholders and customers to understand gaps in utility to develop and mature new capabilities
 * Test & Verification: Develop and execute system test plans; conduct verification and/or validation of complex systems through test plan execution; review test results for system capabilities; conduct detailed analysis of results to the extent able, or clearly communicate analysis needs to the analyst team and put together final briefing packages for customers.