Principal Mechanical Engineer- 2nd Shift

Date Posted: 2026-03-12 Country: United States of America Location: US-AZ-TUCSON-808 ~ 1151 E Hermans Rd ~ BLDG 808 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: Ability to obtain INTERIM U.S. government issued security clearance is required prior to start date 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 Shipboard Effectors Department is currently searching for an experienced Principal Mechanical Engineer to support Standard Missile products and subsystems. This Principal Mechanical Engineering position performs in alignment to expectations in the design, development and production support areas associated with mechanical designs, validation principals, qualification processes, procurement, and production processes across a design life cycle. Work may include requirements understanding, concept development, DFMAs, PFMEAs, margin analysis, technical data package (TDP) development, application of geometric dimensioning and tolerancing principals, engineering test principals, preparation of technical analysis reports, and design review presentation. This position is onsite in Tucson, Arizona and will support 2nd shift with a schedule of Monday - Friday 3pm - 12am and may require up to 10% travel to government supplier and other Raytheon facilities. What You Will Do:

• Perform mechanical design, development, and documentation of components, sub-assemblies, and major end items for defense system equipment in accordance with system requirements.
• Collaborating across multiple disciplines with Structural and Thermal analyst, Materials Engineering, Quality, Safety, Supply Chain.
• Lead a team(s) with limited supervision and meet commitments for assigned schedule, financial, and technical goals.
• Work through engineering problems associated with large structures, welded assemblies, component integration, mechanisms, electronic assemblies
• Support suppliers with product integration
• Strong understanding of Thermal, Structural, Dynamic, and Reliability analysis to provide inputs and support. Incorporate results and findings into mechanical design.
• Perform and review tolerance analysis to ensure form, fit, and function are as intended by design for the use-application.
• Improve new and existing designs using Design for Manufacture and Assembly (DFMA) and Design for Producibility principles.
• Apply knowledge and experience in technical problem solving and hardware development in a fast paced, team environment.

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 or An Advanced Degree in a related field and minimum 5 years' experience.
• Experience with CREO (or equivalent CAD tool)
• Experience developing and executing a plan to develop a mechanical component or subsystem
• Experience with Geometric Dimensioning and Tolerancing (GD&T), basic tolerance analyses, and drawing practices and interpretation for mechanical hardware
• The 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:

• Four years of professional experience related to mechanical design and documentation in Aerospace & Defense industry
• Advanced degree in Engineering discipline
• Proficient in 3D CAD tools (modeling and drawing)
• Geometric Dimensioning & Tolerancing (GD&T) per ANSI Y14.5
• Ability to work in teams or independently, flexible, demonstrates initiative
• Experience in mechanical sub-systems packaging, materials, thermal, structural analysis, energetics principles, control systems, interconnect, airframe, or large assembly development
• Willingness to support tasks as experience allows relative to both design development and production support
• Proficient in CREO (modeling and drawing) and Windchill (PDM)
• Ability to travel to government and other facilities in support of program activities

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! * 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 107,500 USD - 204,500 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. Privacy Policy and Terms: Click on this link ( to read the Policy and Terms Raytheon