Principal Systems Engineer – Software Systems Engineer (Onsite)

Prattwhitney; Tucson (AZ); On-site; USD 120,000 - 180,000; Full time

Job summary

Raytheon in Tucson, AZ is seeking a Principal Systems Engineer to design, integrate, and verify software-centric missile systems. The role focuses on embedded software, MBSE, and requirements management across multiple disciplines and with customer interactions.

The position involves on-site work at the Tucson campus with potential travel. Ideal candidates have 8+ years in Systems Engineering, MBSE, and a strong background in verification and validation activities.

Qualifications

• 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 Systems Engineering
• Experience in Model-Based Systems Engineering (MBSE), Requirements Development, Requirements Management, Requirements Verification, or Integration and Test for software products

Responsibilities

• Update and maintain all system and subsystem level requirements specifications for embedded software, configurable logic and/or test systems software.
• Model the system and the system development and production processes using Cameo.
• Conduct Trade Studies and present results to customers.
• SE technical contributor for verification and validation efforts, ensuring all requirements are being assessed.
• Work closely with the Systems, Software, Configurable Logic and Test teams on a variety of program technical tasks.
• Participate in technical conversations with the customer.
• Become a knowledgeable and ‘go-to’ Systems Engineer for the software centric program capabilities.
• Help to onboard new team members, mentor, and guide them using core Systems Engineering skills.

Skills

Systems Engineering

MBSE

Requirements Management

Analytical thinking

Education

Bachelor's in STEM (preferred)

Master's degree preferred

PhD preferred

Tools

DOORS

cPDM

Job description

Date Posted: 2026-08-03 Country: United States of America Location: US-AZ-TUCSON-805 ~ 1151 E Hermans Rd ~ BLDG 805 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: Top Secret - Current Security Clearance Status: Active and existing security clearance required on day 1 At RTX, the world's 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 freedoms and deter aggression, creating a safer, more secure world. Join us and help shape the future of aerospace and defense.

The Systems Engineering and Test Capabilities (SETC) organization is currently hiring a Principal Systems Engineer to join our Tucson, AZ location. SETC is an exciting and challenging environment where you will have the opportunity to design, develop and partner with multi-disciplines to shape innovative solutions for our customers. Join our organization and experience the Systems V engineering life cycle while interfacing with a variety of engineering disciplines, subject matter experts, Chief Engineers, Chief Technologists, the customer, and so many more to ensure we design, integrate, and strengthen our systems to work the first time and every time for our warfighters!

As a Principal Systems Engineer you will support missile programs as a Software-focused Responsible Systems engineer, contributing directly to successful software requirements and integration for both fielded and development missile systems. These responsibilities include managing system and subsystem requirements, providing SE technical oversight during integration and test activities, participating in verification and validation efforts for the system, and providing SE expertise in troubleshooting and failure investigations. The Software-Systems role requires a high level of technical proficiency in the area of embedded software design, integration and test. This included multi-disciplined coordination, and establishing and maintaining relationships with the embedded software team and customer technical community. In this role, you will have the opportunity to work on an effectors project pertinent to the systems lifecycle.

This role is 100% on-site at our Tucson, AZ campus with the possibility of occasional travel.

What You Will Do

Update and maintain all system and subsystem level requirements specifications for embedded software, configurable logic and/or test systems software. Model the system and the system development and production processes using Cameo. Conduct Trade Studies and present results to customers. SE technical contributor for verification and validation efforts, ensuring all requirements are being assessed. Work closely with the Systems, Software, Configurable Logic and Test teams on a variety of program technical tasks. Participate in technical conversations with the customer. Become a knowledgeable and ‘go-to’ Systems Engineer for the software centric program capabilities. Help to onboard new team members, mentor, and guide them using core Systems Engineering skills.

Qualifications You Must Have

• 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 Systems Engineering
• Experience in Model-Based Systems Engineering (MBSE), Requirements Development, Requirements Management, Requirements Verification, or Integration and Test for software products

Qualifications We Prefer

• Masters or PhD in Engineering, Math or Physics
• Experience using Agile framework development methods / processes
• Experience with Agile, Model-Based Systems Engineering (MBSE), and/or Digital Engineering
• Experience presenting analytical and technical presentations
• Experience evaluating and mitigating technical risks
• A self-starter who can take on task with limited guidance
• Customer focus and collaboration skills
• Experience with performance analysis
• Experience with DOORS and/or cPDM