2026 Fulltime Systems Engineer I, Modeling and Simulation Developer - Onsite

Date Posted:

2026-05-08

Country:

United States of America

Location:

US-TX-MCKINNEY-513WD ~ 2501 W University Dr ~ WING D BLDG

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:

DoD Clearance: Secret

Security Clearance Status:

Active and existing security clearance required after day 1

At Raytheon, the foundation of everything we do is rooted in our values and a higher calling – to help our nation and allies defend freedoms and deter aggression. We bring 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. Our team solves tough, meaningful problems that create a safer, more secure world.

As a System Engineer I – Modeling & Simulation Developer, you will be part of a team of systems engineers dedicated to delivering best-in-class Raytheon products for the warfighter through modeling, simulation, and analysis. Your work will help demonstrate mission effectiveness of systems and system-of-systems operating in complex threat environments. On this team, you will be responsible for developing mission simulations, virtual prototypes, and system emulators that represent a variety of mission technologies including sensors, effectors, communications, command and control, and more. This will include integrating live-virtual-constructive (LVC) simulations with other simulations, custom software, commercial-off-the-shelf software (COTS), government furnished models, hardware, and user interfaces

What You Will Do

• Developing and integrating new capabilities into existing simulation models.
• Running our simulation environments and generating analysis data for evaluation.
• Document design approaches and implement them.
• Define and execute analysis plans.
• Participating in technical reviews with internal and external customers.
• You will contribute and collaborate in a team environment, receiving input from the program, external customers, or team experts, and work on projects, as you determine, develop, and implement analytic approaches that will generate the supporting data to inform programmatic decisions.

Qualifications You Must Have

• Bachelors Degree in Computer Engineering, Computer Science, Mathematics, Physics, or related STEM Degree
• Experience with developing software applications including languages such as C/C++ or Java
• Experience with Object-oriented programming designs (OOP / OOD)

Qualifications We Prefer

• Familiar with developing software in Windows and Linux Environments.
• Familiar with or desire to learn 2D and 3D Software rendering, including Texturing, Shaders, OpenGL, Open Scene Graph
• Familiar with or desire to learn gaming engines or related technologies, including Unreal / Creator / 3DS Max, 3D object modeling
• Familiar with or desire to learn scientific computing software (eg: MATLAB) to evaluate analysis data.
• Experience using scripting languages (eg: Python, Perl) to automate tasks.
• Familiar with or desired to learn software or system modeling practices (eg: UML, SysML, DoDAF)

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

Learn More & Apply Now

• Please consider the following role type definition as you apply for this role.
• 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.
• Please upload a copy of your most recent transcripts with your resume when applying to this requisition. Include your cumulative GPA and projected graduation date on your resume.
• 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

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 57,200 USD - 108,800 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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