Mechanical Engineer Principal Firmware and Control

Job Description

Date Posted : 2025-10-13

Country :

United States of America

Location :

AZ862 : 3360 Hemisphere Loop Bldg M10 3360 East Hemisphere Loop Building M10, Tucson, AZ, 85706 USA

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 :

DoD Clearance : Secret

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.

The PCAS department is seeking an embedded firmware engineer for algorithm development and implementation in a variety of electromechanical control assemblies.

What You Will Do

You will help design, implement and verify motor control embedded firmware designs for current and future Control Actuation Systems.

You will implement digital control algorithms in C / C++ in conjunction with the Controls and Algorithms team.

Additionally, you will interact with mechanical and electrical design engineers and vendors to optimize hardware designs.

What You Will Learn

You will have the opportunity to perform hands-on hardware and firmware integration and verification testing in a laboratory environment.

Solid understanding of C / C++ development, experience with MATLAB / Simulink and the ability to work with electrical and mechanical hardware.

You will have the opportunity to mentor early career engineers.

Qualifications You Must Have

Typically requires a degree in Science, Technology, Engineering or Mathematics (STEM) and a minimum of 8 years of prior relevant experience unless prohibited by local laws / regulations.

A minimum of 8 years of experience in embedded firmware design, development and / or verification.

Experience with C / C++ development on any embedded hardware platforms.

Experience with model development and data analysis in MATLAB / Simulink

Ability to obtain and maintain a US security clearance prior to the start date.  U.S. citizenship is required as only U.S. citizens are eligible for a security clearance.

Qualifications We Value

Experience of developing firmware or software for safety significant environments including requirements development and traceability, design decomposition and documentation, static code analysis, design to safety critical coding standards such as MISRA-C, test case development, code coverage including modified decision / code coverage (MC / DC), code coverage analysis and formal qualification testing.

A working understanding of configurable logic (FPGA firmware) and VHDL.

Experience implementing digital control algorithms in hardware including embedded microcontrollers, digital signal processors, FPGAs and a working understanding of serial communication interfaces, analog to digital converters, and PWM generators.

Experience working with and integrating hardware.

Basic understanding of modeling and controls of electric motors and solid background in PMSM motor fundamentals

Digital and analog signal electronics design, development and verification.

Use of software / firmware configuration management tools such as GIT, Subversion or similar tools

Strong verbal and written communication and ability to work hands-on in teams.

Basic proficiency with model development and data analysis in MATLAB / Simulink

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 Eligibility

Learn More & Apply Now! (Optional)

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.

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 101,000 USD - 203,000 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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