Senior Simulation Engineer Onsite

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

Benefits offered by this job

Medical

Dental

Vision

401(k) match

Paid time off

Holidays

Flexible work schedules

Employee Scholar Program

Parental leave

Job summary

RTX in Tucson, AZ is seeking a software engineer to design and evaluate high‑fidelity digital simulation software within advanced computing environments. The role requires a STEM degree and 5+ years of experience in C++ and Python for analysis and automation.

Work will involve collaboration with program leadership and customers, development of model‑based decision support, and occasional travel (<10%). Onsite role supporting aerospace/defense programs.

Qualifications

• Degree in STEM with 5+ years of relevant experience.
• Experience developing software in C++ for engineering, research, or production.
• Experience writing/modifying C++ code for technical, scientific, or system-level applications.
• Experience developing Python scripts for analysis, automation, or system integration.
• Experience using Python to analyze data, model behaviors, or support workflows.

Responsibilities

• Develop high-fidelity digital simulation software in technical computing environments.
• Contribute to trade studies evaluating weapon system performance.
• Apply performance engineering practices to evaluate computational problems and identify improvements.
• Collaborate with program leadership, customers, and experts to develop analytic approaches for decisions.
• Develop and implement model-based solutions; validate models and software components.
• Travel occasionally to support project needs (typically <10%).

Skills

C++ development

Python scripting

Data analysis with Python

C++ programming

Education

STEM degree

Advanced degree preferred

Tools

AFSIM

Job description

Date Posted: 2026-08-24 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: 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.

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.

Location

Tucson, AZ

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.

Clearance Information

This position requires a security clearance. DCSA Consolidated Adjudication Services (DCSA CAS), an agency of the Department of Defense, handles and adjudicates the security clearance process. More information about Security Clearances can be found on the US Department of State government website here: https://www.state.gov/m/ds/clearances/c10978.htm

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

Salary

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.

Application Window

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.

Equal Opportunity Employer

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.

Affirmative Action

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.

Company Overview

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.