Principal Systems Engineer - Modeling Simulation & Analysis Engineer

RTX (Raytheon); Tucson (AZ); On-site; USD 150,000 - 190,000; Full time

Job summary

RTX is seeking a Principal Systems Engineer - Modeling, Simulation & Analysis to join our Tucson team onsite. You will build high fidelity simulations for missile design, evaluate system performance, and guide multi-disciplinary modeling efforts across GNC and signal processing disciplines.

This role emphasizes leadership and hands-on modeling across the program lifecycle. The position requires a Bachelor’s in a STEM field with around 8+ years of experience, strong C/C++ and MATLAB/Python

Qualifications

• Bachelor's degree in Engineering, Science, Physics, Mathematics, or related STEM field.
• 8+ years of relevant experience in systems engineering or modeling/simulation.
• Experience with object-oriented design and software tools.
• Experience in modeling, simulation, statistics, or analysis for engineering solutions.
• Ability to obtain Interim Secret security clearance and pursue higher access.

Responsibilities

• Create high fidelity simulations and models for missile design, performance assessment, and flight test support.
• Develop and implement modeling solutions, conduct trade studies, assess system performance.
• Collaborate with team members and provide guidance to others on the modeling tasks.
• Work with GNC, Signal Processing, and other performance groups to perform simulations per schedule.
• Lead development across product lifecycle from concept to fielded product and provide technical expertise.

Skills

C/C++ programming

MATLAB

Python

Modeling & simulation

Leadership

OO design

Education

B.S. in Engineering/Science/Physics/Math

Tools

Git

UNIX/Linux

Job description

Date Posted:2026-09-10

Country:United States of America

Location:US-AZ-TUCSON-9020 ~ 9020 S Rita Rd ~ BLDG 9020

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:DoD Clearance: Secret

Security Clearance Status:Ability to obtain INTERIM U.S. government issued security clearance is required prior to start date

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.

We're looking for a Principal Systems Engineer - Modeling Simulation & Analysis Engineers who enjoy solving complex problems, engaging in a dynamic team environment, and are eager to learn.

As a Principal Systems Engineer - Modeling Simulation & Analysis Engineer , you will participate in challenging multi-disciplinary work across integrated product teams consisting of Guidance, Navigation & Control (GNC), Signal Processing and missile-and-sensor-level Performance Simulations. Our Performance Simulation teams provide, develop, and maintain high fidelity performance simulations, evaluate system performance, support new business initiatives and develop & execute technology roadmaps. This is an Onsite role in Tucson, AZ

What You will Do

• You will create high fidelity simulations and models for missile design, performance assessment, and flight test support
• You will be responsible for the development and implementation of modeling solutions, and subsequently conduct trade studies and evaluation of system and subsystem performance
• You will work in a team environment, receiving input from the team supervisors and providing guidance and/or direction to other team members
• You will collaborate with Guidance, Navigation & Control (GNC), Signal Processing, and other performance personnel to perform simulation activities according to the program schedule
• You will work on different projects, determine, and develop approaches and solutions, and provide development guidance throughout the product lifecycle from initial concept to fielded product
• You will provide technical expertise for the simulation products of a specific program, and assist Senior Modeling Engineers in the preparation of detailed plans, and may interact with government counterparts as an authority on simulation products

Qualifications You Must Have

• Typically requires a Bachelor's degree in Engineering, Science, Physics, Mathematics, or a related STEM degree and a minimum of 8 years of relevant prior experience
• Experience applying object-oriented software design in C++, C, and using MATLAB or Python for evaluation of data sets
• Experience developing or simulating physical systems
• Experience in modeling, simulation, statistics, or analysis for existing or proposed engineering solutions
• Experience as a Functional and/or Technical lead within an engineering environment
• Ability to obtain an Interim Secret U.S. government issued Security Clearance is required prior to start date with the ability to obtain special program access after start. U.S. citizenship is required, as only U.S. citizens are eligible for a security clearance

Qualifications We Prefer

• Advanced Degree in Engineering, Science, Mathematics, or related STEM degree
• Leadership experience managing others using applied system engineering principles, experience working on a team and by yourself, interfacing with multiple engineering disciplines
• Experience creating and/or presenting technical briefings
• Experience developing signal processing / GNC algorithms or models for missile applications
• Experience with control hardware design & test and/or hardware & software integration
• Experience modeling physics and/or modeling physical systems as related to flight dynamics
• Experience using UNIX / Linux based workstations and using Software Configuration Management tools such as Git
• Course work or experience in some of the following fields: radar, signal & image processing, radar and/or EO/IR environment models, digital communications, probability and statistics, linear algebra, estimation theory, optimal control, system architecture, inertial navi