Senior Principal Mechanical Engineer

The Senior Principal Mechanical Engineer will lead section tasks, manage personnel, and oversee mechanical design and integration for RF systems. The role requires a strong background in mechanical engineering, project management, and problem-solving skills. Candidates must have a minimum of 10 years of relevant experience and a degree in STEM. The position is based in Mc Kinney, Texas, and requires U.S. citizenship and an active security clearance.

Date Posted:

2026-06-02

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:

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:

Active and existing security clearance required on 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.

Raytheon’s Airborne Sensor RF Design Department is seeking a Senior Principal Mechanical Engineer to work onsite at the Mc Kinney, Texas location. The candidate will perform section leadership tasks, personnel management, and mechanical design, test, integration and documentation for RF systems and sub-systems.

What You Will Do:

• The candidate will follow established procedures and instructions while working closely with program and functional leadership to ensure that technical goals are met.
• The candidate will be responsible for developing and implementing technical solutions to a wide range of complex problems.
• The candidate will be also responsible for meeting cost, schedule, quality, and performance requirements for their work products.
• The candidate will lead a section of technical personnel, facilitating the career development of those in the section.

RTX Corporation 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 Systems, Pratt & Whitney, and Raytheon. Its 185,000 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, VA.

The following position is to join our RTX Corporate, Enterprise Services, Research Center or BBN team:

What We Offer: Whether you’re just starting out on your career journey or are an experienced professional, we offer a robust total rewards package with compensation; healthcare, wellness, retirement and work/life benefits; career development and recognition programs. Some of the benefits we offer include parental (including paternal) leave, flexible work schedules, achievement awards, educational assistance and child/adult backup care.

Qualifications You Must Have:

• Typically requires a degree in Science, Technology, Engineering or Mathematics (STEM) and a minimum of 10 years of prior relevant experience, or an Advanced Degree in a related field and minimum 7 years’ experience.
• Experience with mechanical design and integration of RF systems or subsystems.

Qualifications We Prefer:

• Expert or mastery level knowledge of work area, typically obtained through advanced education combined with experience.
• May have deep knowledge of project management. Advanced knowledge of related disciplines within work area and ability to identify links and potential impact on projects, programs
• or systems.

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.

**This position offers relocation based on candidate eligibility.Learn More & Apply Now!

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 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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• Date Posted:2026-06-02Country:United States of America Location:US-TX-MCKINNEY-513WD ~ 2501 W University Dr ~ WING D BLDGPosition Role Type:OnsiteU.S. Citizen, U.S. Person, or Immigration Status Requir Responsibilities
• The candidate will perform section leadership tasks and manage technical personnel.
• The candidate will develop and implement technical solutions to complex problems.
• The candidate will ensure that cost, schedule, quality, and performance requirements are met for work products.
• The candidate will work closely with program and functional leadership to achieve technical goals. Skills
• Mechanical Design
• RF Systems Integration
• Technical Leadership
• Project Management
• Problem Solving
• Personnel Management
• Cost Management
• Quality Assurance
• Documentation
• Integration Testing
• Engineering Principles
• Collaboration
• Innovation
• Advanced STEM Knowledge Education
• A degree in Science, Technology, Engineering, or Mathematics (STEM) is required.