Principal Mechanical Engineer, Design

Prattwhitney; Tucson (AZ); On-site; USD 107,500 - 204,500; Full time

Benefits offered by this job

Medical benefits

401(k) match

Annual incentive programs

Job summary

Raytheon Technologies in Tucson is seeking a Principal Mechanical Engineer to own the mechanical design lifecycle—from initial design through production and fielding—across multiple product lines. The role requires leadership across cross‑functional teams and collaboration with program leadership to deliver robust designs.

Location is onsite in Tucson, AZ. The candidate must have a STEM degree with 8+ years of experience, CREO and GD&T proficiency, and the ability to travel to government and

Qualifications

• Bachelor’s or advanced STEM degree with 8+ years of experience; advanced degree OK.
• Technical leadership across the mechanical product lifecycle, including requirements, trade studies, design, and test.
• Experience creating, releasing, and updating mechanical data packages in production environments.
• CREO CAD proficiency and GD&T knowledge essential.
• Willingness to travel to government and supplier facilities.

Responsibilities

• Lead mechanical design, development, and documentation of components, sub‑assemblies, and major end items to meet system requirements.
• Lead and mentor mechanical engineering teams while meeting schedule, cost, and technical objectives.
• Collaborate with analysts, materials, quality, safety, supply chain, operations, and program leadership to refine designs.
• Support factories and suppliers with development, integration, troubleshooting, and obsolescence management, domestically and internationally.
• Conduct trade studies, participate in design peer reviews, and resolve technical action items.

Skills

Technical leadership

CREO CAD

GD&T

Cross-functional collaboration

Mentoring teams

Education

STEM degree

Advanced degree (mechanical/hardware)

Tools

Windchill

CREO

Job description

Position Summary

Principal Mechanical Engineer within the Mechanical Design organization in Raytheon Hardware Engineering. Supports the full lifecycle of hardware development—from initial design through production and fielding—across multiple product lines and customer communities.

Location: Onsite in Tucson, AZ.

Key Responsibilities

• Perform mechanical design, development, and documentation of components, sub‑assemblies, and major end items in accordance with system requirements.
• Lead and mentor mechanical engineering teams while meeting schedule, financial, and technical objectives.
• Collaborate with structural/thermal analysts, materials engineering, quality, safety, supply chain, operations, and program leadership to develop and refine design solutions.
• Support factories and suppliers with product development, integration, troubleshooting, and obsolescence management, domestically and internationally.
• Conduct trade studies, participate in design peer reviews, and resolve technical action items.
• Apply thermal, structural, dynamic, and reliability analysis results to improve mechanical designs.
• Apply Geometric Dimensioning and Tolerancing (GD&T) principles, including performing and reviewing tolerance analyses to ensure proper form, fit, and function.
• Improve designs using DFMA and producibility principles.
• Develop and maintain the technical data package (TDP), ensuring capabilities and requirements compliance.
• Serve as responsible engineer or subsystem lead, directing and reviewing work from team members with limited supervision.
• Utilize Raytheon hardware tools, processes, and standards across all phases of development.
• Support First Article Inspection (FAI) and Raytheon Source Inspection (RSI) in partnership with Quality Engineering.
• Contribute to one or more of our contract‑funded and internal research projects at varying stages of proposal, design, and integration/test.

Required Qualifications

• Typically requires a degree in Science, Technology, Engineering or Mathematics (STEM) and a minimum of 8 years of prior relevant experience or an Advanced Degree in a related field and minimum 5 years experience.
• Experience in technical leadership across the mechanical product development lifecycle, including requirements development, trade studies, design, integration, and/or test.
• Experience working across multiple functional and discipline areas to resolve technical challenges and drive development of mechanical components and/or subsystems.
• Experience creating, releasing, and/or updating mechanical technical data packages and interpreting technical documentation in a production environment.
• Experience with CREO (or equivalent CAD tools).
• Experience with the application of Geometric Dimensioning and Tolerancing (GD&T), including basic tolerance analyses and drawing interpretation.

Preferred Qualifications

• Advanced degree in mechanical, manufacturing, or hardware systems engineering.
• Experience supporting development and production programs for military/aerospace mechanical products, including factory support for full‑rate production.
• Working knowledge of military and commercial specifications.
• Experience collaborating with suppliers developing mechanical products, machined parts, and electronics.
• Proficient in 3D CAD modeling and drawing (CREO or equivalent) and experienced with Windchill or similar product data management tools.
• Strong understanding and application of Geometric Dimensioning & Tolerancing (GD&T) per ANSI Y14.5.
• Experience in mechanical subsystem packaging, materials, thermal/structural analysis, energetics principles, control systems, interconnect, airframe, or large assembly development.
• Ability to work both independently and collaboratively; demonstrates initiative, flexibility, strong communication skills, and effective technical leadership.
• Willingness to support tasks across design development and production.
• Ability to travel to government and supplier facilities in support of program activities.

Security Clearance

U.S. citizenship required. Active and transferable DoD Secret clearance necessary prior to start date.

Benefits

Salary range: 107,500 USD - 204,500 USD. Hired applicants may be eligible for 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 depend on the business unit and collective‑bargaining agreement. Eligible employees may also participate in annual incentive compensation programs.

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. 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.