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# Principal Systems Engineer - Responsible Systems Engineer Onsite

- **Company:** RTX
- **Location:** Huntsville, AL, United States
- **Experience:** Expert
- **Salary:** $107,500.0 - $204,500.0
- **Contract:** Permanent contract
- **Skills:** Microsoft Windows, Systems Engineering, Architectural Patterns, Cyber Security, Linux, Systems Architecture
- **Published:** October 28, 2026
- **Apply:** https://www.indeed.com/viewjob?jk=38ba384854c9615b

## About the Role

* Typically requires a degree in Science, Technology, Engineering, or Mathematics (STEM) and a minimum of 8 years of prior relevant experience.
 * Experience with MSOSA (Cameo) and/or DOORS.

Qualifications We Prefer

 * Experience supporting Missile Defense Agency (MDA) programs or other DoD engineering environments.
 * Experience using Digital Engineering (DE) and Model-Based Systems Engineering (MBSE) in system design and specification.
 * Experience supporting proposal development and technical volume preparation.
 * Familiarity with Linux and Windows enterprise environments.
 * Experience working in classified and secure computing environments.

## Description

Raytheon's Surface Radars and Sensors (SR&S) Center, Huntsville AL Department, is seeking a Principal Systems Engineer to join the System Design and Requirements (SDR) Capability team as part of the System Engineering & Integration Team (SE&IT). The Responsible Systems Engineer (RSE) will lead cross-functional systems engineering teams to develop system level technical solutions for the Missile Defense Agency (MDA). The candidate will guide the development of system level architecture, requirements, and interfaces to influence incremental capability. The candidate will use Model Based Systems Engineering (MBSE) to evaluate architectural impacts through functional behavior analysis for the defeat of conventional and advanced Threat (i.e., ballistic, aero-maneuvering, hyper-glide, countermeasures, etc.) systems within the MDA mission areas.

The RSE will use the MBSE environment collaborate to develop system-of-systems requirements via system/component trade studies and analysis and lead the development of Change Notices (CNs) to MDA's system specification including functional, interface and performance requirements, architectural models, interface definitions, and support Trace verification from System to Element level requirements. The RSE will develop and deliver products (i.e., technical briefings, CNs) to support internal and MDA stakeholder reviews.

What You Will Do

 * Lead development of system architecture, functional behavior analysis, and requirements allocation.
 * Apply MBSE tools (Cameo/MSOSA) to evaluate architectural impacts and conduct trade studies.
 * Develop and update system specifications, interface definitions, and Change Notices (CNs).
 * Support traceability from system to element requirements in DOORS.
 * Prepare and deliver technical briefings for internal and MDA stakeholder reviews.
 * Collaborate with cross-functional teams and customer counterparts to develop technical solutions.
 * Domestic/Local travel is expected, approximately around 10-15%.