Modeling and Simulation Senior Principal Engineer (Onsite)

Date Posted:

2026-05-20

Country:

United States of America

Location:

US-TX-RICHARDSON-C37 ~ 1737 Cityline Dr ~ CITYLINE C37

Position Role Type:

Onsite

U.S. Citizen, U.S. Person, or Immigration Status Requirements:

The ability to obtain and maintain a U.S. government issued security clearance is required.​ U.S. citizenship is required, as only U.S. citizens are eligible for a security clearance

Security Clearance Type:

TS/SCI with Polygraph

Security Clearance Status:

Active and existing security clearance required after 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 freedoms and deter aggression, creating a safer, more secure world. Join us and help shape the future of aerospace and defense.

Raytheon is seeking a Modeling and Simulation Senior Principal Engineer to join the Mission Applied Science & Technology (MAST) team. The MAST directorate is an energetic multi-disciplinary team of over 60 engineers working collaboratively with internal and external customers to develop novel solutions for data science and emerging technology applications. Our team pushes the boundaries of innovation and creativity to establish next-generation mission solutions from system-level up to campaign level.

We are seeking a skilled Modeling and Simulation Engineer with a primary focus on developing a Python-based application for simulation, modeling, and analysis of complex real-world systems. Other potential project focus areas include applying data and analytic methods to mission management, command and control systems, AIML applications, or Live Virtual Constructive simulation environments. The ideal candidate will have a passion for designing and developing data analytic solutions to enable data-driven decision-making, such as trade-off analyses. This role requires collaborating with a multi-disciplinary team that is distributed across time zones. You must have the ability to manage time and resources to meet assigned deadlines working within an Agile development environment. This role may require some travel to other US Raytheon sites.

What You Will Do

• Interface with senior leaders, stakeholders, end users, and subject matter experts to define production model requirements, validate implemented models, and conduct demonstrations   

• Collaborate with a multi-disciplinary team to define, design, and implement new production model configurations and software features for a Python-based simulation application

• Employ data analytic methods (e.g., data collection and processing, statistical analysis, distribution fitting, etc.) to maintain production model input parameters

• Conduct verification, validation, and testing of new and revised production model configurations and software features

• Deliver presentations and demonstrations to leaders and stakeholders across multiple levels of the organization, functional disciplines, and business units

• Participate in code reviews and enforce adherence to coding standards and best practices

Qualifications You Must Have

• Typically requires a bachelor’s degree in Science, Technology, Engineering, or Mathematics (STEM) and a minimum of 10 years of prior relevant experience

• Experience collaborating with customers to define requirements and measures of success

• Experience with simulation modeling and analysis processes for complex real-world systems:

• Problem definition, data processing, statistics, Figures of Merit (FoM), model design and translation, verification and validation, visualizations, etc.

• Experience with multiple Python libraries and software packages for backend and / or frontend development in an object-oriented programming environment:

• NumPy, Pandas, SimPy, Panel, Bokeh, Pydot, PyQt, Plotly Dash, HoloViz, Graphviz, etc.

• Proficient in interacting with software through a terminal interface:

• Bash, Powershell, iPython, etc.

• The ability to obtain and maintain a U.S. government issued security clearance is required. U.S. citizenship is required, as only U.S. citizens are eligible for a security clearance.

Qualifications We Prefer

• Strong customer focus

• Experience with statistics, statistical modeling (e.g., logistic regression, Bayesian models, etc.), and/or data distribution fitting (e.g., normal, lognormal, Weibull, etc.)

• Experience with implementing Discrete Event Simulation

• Experience in technical leadership / mentorship

• Experience with one or more of the following code hosting and version control tools:

• Bitbucket, GitHub, GitLab, Azure DevOps, etc.

• Experience working with a team distributed across multiple time zones

• Scrum Master and / or Product Owner certification

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 for this position 

Learn More & Apply Now! 

• 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 #LI-RH2

As part of our commitment to maintaining a secure hiring process, candidates may be asked to attend select 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 132,400 USD - 251,600 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, 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.

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