Principal Systems Engineer - Responsible Systems Engineer Onsite

RTX (Raytheon); Huntsville (AL); On-site; USD 108,000 - 205,000; Full time

Benefits offered by this job

Relocation assistance available

Job summary

RTX in Huntsville, AL, seeks a Principal Systems Engineer to join the SDR Capability team. You will lead system architecture, apply MBSE, and drive requirements from system to element levels, influencing MDBA mission solutions and interfaces.

Responsibilities include trade studies, CN development, and delivering technical briefings to internal and external stakeholders. Domestic/local travel is expected.

Qualifications

• Typically requires a STEM degree and extensive relevant experience.
• Experience with MBSE tools and system engineering practices.
• Proven ability to lead cross-functional engineering teams.

Responsibilities

• Lead development of system architecture and requirements allocation.
• Apply MBSE tools to evaluate architectural impacts and conduct trade studies.
• Develop and update system specifications and interface definitions.
• Support traceability from system to element requirements.
• Prepare technical briefings and CNs for stakeholder reviews.
• Collaborate with cross-functional teams and customer counterparts.

Skills

MBSE

Cameo/MSOSA

DOORS

System architecture

Cross-functional teamwork

Education

STEM degree

Tools

MSOSA (Cameo)

DOORS

Job description

Date Posted: 2026-10-28

Country: United States of America

Location: US-AL-HUNTSVILLE-401 ~ 401 Jan Davis Dr NW ~ JAN DAVIS 401

Position Role Type: Onsite

U.S. Citizen, U.S. Person, or Immigration Status Requirements: Active and transferable 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 a security clearance

Security Clearance Type: Secret - Current

Security Clearance Status: Active and existing security clearance required on day 1

At RTX, the world largest aerospace and defense company, 185,000 great minds are united by purpose and inspired to make a difference solving the world's most complex problems. With our three market leading businesses, world-class operations and investments in research and development, we offer capabilities and opportunity no one else can. Together, we push the boundaries of known science and find new ways to connect and protect our world.

Raytheon brings the strength of more than 100 years of experience and renowned engineering expertise to meet the needs of today's mission and stay ahead of tomorrow's threat. We deliver solutions that help our nation and allies defend freedom and deter aggression, creating a safer, more secure world. Join us and help shape the future of aerospace and defense.

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%.

Qualifications You Must Have

• 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.

What We Offer

• Our values drive our actions, behaviors, and performance with a vision for a safer, more connected world. At RTX we value: Safety, Trust, Respect, Accountability, Collaboration, and Innovation.
• Relocation Eligible - Relocation assistance available

Onsite : Employees who are working in Onsite roles will work primarily onsite. This includes all production and maintenance employees, as they are essential to the development of our products.

Welcome to Raytheon in Huntsville, AL

As part of our commitment to maintaining a secure hiring process, candidates may be asked to attend select steps of the interview process in-person at one of our office locations, regardless of whether the role is designated as on-site, hybrid or remote.

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 experien