Senior Simulation Engineer Onsite

RTX; Tucson (AZ); On-site; USD 87,000 - 165,000; Full time

Job summary

RTX, the world’s largest aerospace and defense company, seeks an experienced software engineer to design and assess high-fidelity simulation tools. You will contribute to weapon system analyses and data-driven decision support in a collaborative, technically driven team environment.

The role emphasizes C++ and Python development, model-based systems engineering, and occasional travel. Candidates should hold a STEM degree with at least five years of relevant experience and a proven track record

Qualifications

• Typically requires a STEM degree and a minimum of 5 years of relevant experience.
• Experience developing software using C++ in an engineering, research, or production environment.
• Experience writing, modifying or maintaining C++ code for technical, scientific, or system-level applications.
• Experience developing scripts or applications in Python for analysis, automation, or system integration.
• Experience using Python to analyze data, model behaviors, or support operational workflows.

Responsibilities

• Support the design, development, and use of high-fidelity digital simulation software within advanced technical computing environments.
• Contribute to trade studies that evaluate weapon system performance across multiple threat types and kill-chain scenarios.
• Apply established performance engineering practices to evaluate computational problems and identify improvements.
• Collaborate in a team environment with program leadership, customers, and experts to develop analytic approaches and data for decision-making.
• Participate in development and implementation of model-based solutions, including validation and testing of models and components.
• Perform occasional travel to support project needs (typically less than 10%).

Skills

C++ development

C++ maintenance

Python scripting

Python data analysis

STEM degree

Education

STEM degree

Tools

AFSIM

Job description

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.

What You Will Do

• Support the design, development, and use of high‑fidelity digital simulation software within advanced technical computing environments.
• Contribute to trade studies that evaluate weapon system performance across multiple threat types and kill‑chain scenarios.
• Apply established performance engineering practices and procedures to evaluate a wide range of computational problems, including assessments of potential system improvements, missile effectiveness against single or multiple threats, and identification of countermeasures that may influence effectivity or survivability.
• Collaborate in a team environment by incorporating input from program leadership, external customers, and technical experts, and develop analytic approaches that generate data required to inform programmatic decisions.
• Participate in the development and implementation of model‑based solutions that support decision systems, including the validation and testing of models, software components, and integrated system elements.
• Perform occasional travel to support project needs (typically less than 10%).

Qualifications You Must Have

• Typically requires a degree in Science, Technology, Engineering or Mathematics (STEM) and a minimum of 5 years of prior relevant experience unless prohibited by local laws/regulations.
• Experience developing software using C++ in an engineering, research, or production environment.
• Experience writing, modifying, or maintaining C++ code for technical, scientific, or system‑level applications.
• Experience developing scripts or applications in Python for analysis, automation, or system integration.
• Experience using Python to analyze data, model behaviors, or support operational workflows.

Qualifications We Prefer

• Advanced degree in Physics, Applied Mathematics, Electrical Engineering, or Aerospace Engineering
• Experience using AFSIM or other mission analysis simulation tools
• Experience with campaign analysis simulation tools
• Experience applying the physics of magnetism in a practical, research, engineering, or laboratory setting.

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.

As part of our commitment to maintaining a secure hiring process, candidates may be asked to attendselect 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 86,800 USD - 165,200 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.

Benefits

• 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
• holidays

Incentive Compensation

• 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, but not limited to, 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.