Principal Systems Engineer - Responsible Systems Engineer Onsite

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

Benefits offered by this job

Relocation assistance

Competitive benefits package

Job summary

RTX's Surface Radars and Sensors (SR&S) Center in Huntsville, AL is seeking a Principal Systems Engineer to lead cross‑functional MBSE‑driven system design for Missile Defense Agency programs. You will guide architecture, requirements, interfaces, and traceability from system to element level, delivering CNs and technical briefings for internal and external reviews.

The role requires a STEM degree and 8+ years of experience, familiarity with Cameo, DOORS, MBSE tools, and the ability to work in

Qualifications

• Typically requires a STEM degree and a minimum of 8 years of prior relevant experience.
• Experience with MBSE, Cameo/MSOSA and DOORS for system design and requirements.

Responsibilities

• Lead development of system architecture, functional behavior analysis, and requirements allocation.
• Apply MBSE tools 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%.

Skills

MBSE

Cameo/MSOSA

DOORS

Linux

Windows

Education

STEM degree

Tools

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

• 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.

• 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

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.

• Hired applicants may be eligible for benefits, including but not limited to, medical, dental, vision, life insurance, short-term disability, 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.
• Specific benefits are dependent upon the specific business unit as well as whether or not the position is covered by a collective-bargaining agreement.

Hired applicants may be eligible for annual short-term and/or long-term incentive compensation programs depending on the level of the position and whether or not it is covered by a collective-bargaining agreement. Payments under these annual programs are not guaranteed and are dependent upon a variety of factors including, individual performance, business unit performance, and/or the company’s performance.

This role is a U.S.-based role. If the successful candidate resides in a U.S. territory, the appropriate pay structure and benefits will apply.

RTX anticipates the application window closing approximately 40 days from the date the notice was posted. However, factors such as candidate flow and business necessity may require RTX to shorten or extend the application window.

RTX is an Equal Opportunity Employer.

All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, age, disability or veteran status, or any other applicable state or federal protected class.

RTX provides affirmative action in employment for qualified Individuals with a Disability and Protected Veterans in compliance with Section 503 of the Rehabilitation Act and the Vietnam Era Veterans’ Readjustment Assistance Act.

Privacy Policy and Terms:

RTX is an aerospace and defense company that provides advanced systems and services for commercial, military and government customers worldwide. It comprises three industry-leading businesses – Collins Aerospace, Pratt & Whitney, and Raytheon. Its 195,000 employees enable the company to operate at the edge of known science as they imagine and deliver solutions that push the boundaries in quantum physics, electric propulsion, directed energy, hypersonics, avionics and cybersecurity. The company, formed in 2020 through the combination of Raytheon Company and the United Technologies Corporation aerospace businesses, is headquartered in Arlington, Virginia.