Senior Mechanical Engineer P3

Date Posted:

2026-11-03

 Country:

United States of America

 Location:

US-AZ-TUCSON-M09 ~ 3350 E Hemisphere Loop ~ BLDG M09

 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 RTX, the world's largest aerospace and defense company, 185,000 great minds are united by purpose and inspired to make a difference solving the world’s most complex problems. With our three market leading businesses, world-class operations and investments in research and development, we offer capabilities and opportunity no one else can.

Together, we push the boundaries of known science and find new ways to connect and protect our world.

Raytheon brings 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. We deliver solutions that help our nation and allies defend freedoms and deter aggression, creating a safer, more secure world. Join us and help shape the future of aerospace and defense.

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 Hardware Engineering, Land Based Effectors Department is seeking Sr. Mechanical Engineers for our Tucson AZ site supporting full program life cycle, early development, production support, and legacy sustainment activities across the Land Based Effectors products and subsystems. These products support US Government and international customers.

Mechanical Engineering positions perform 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.

Development work may include requirements understanding, concept development, DFMAs, PFMAs, margin analysis, technical data package (TDP) development, application of geometric dimensioning and tolerancing principals, engineering test principals, preparation of technical analysis reports, and presenting in design reviews.

These positions support product lines based in Tucson, AZ, and may require domestic and international travel to suppliers, Raytheon facilities, and customer sites. Position are onsite in Tucson, Arizona.

What You Will Do

• Technical ownership and execution of tasks and may be viewed as a prime technical contact in providing solutions to a wide range of complex technical problems related to the design, manufacture, integration, and production sustainment of various mechanical sub-systems both in the engineering lab and the factory floor both at Raytheon Technologies and at suppliers.
• Communicate with cross-disciplined, engineering team members and suppliers to analyze, model, and document the design technical data package (TDP) and its capabilities and compliance with requirements.
• Work autonomously with limited supervision, acting as the responsible engineer for major hardware subsystem. This often requires the ability to lead small teams of junior engineers, and collaborate across multiple functions and disciplines, such as supply chain, operations, quality, systems, analysis, and electrical.
• May be asked to lead small teams
• Serves in mentor role to junior engineers, providing technical guidance to others within the mechanical discipline.
• Perform mechanical design, development, and documentation of components, sub-assemblies, and major end items for defense system equipment in accordance with system requirements.
• Collaborate with Raytheon factories and suppliers with new product integration and manufacturing process improvements.
• Perform and review tolerance analyses 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.
• Support production of various mechanical sub-systems at internal factories and suppliers.
• Support first hardware builds and first article inspections.
• Review manufacturing process instructions and support material review board dispositions.
• Perform root cause investigations on hardware of production related issues.

Qualifications

You Must Have

• Requires a Bachelor's Degree in Science, Technology, Engineering, and Mathematics (STEM) and a minimum of 6 years of prior relevant experience.
• Six years of work experience in mechanical design and design documentation.
• Mechanical aptitude to provide solutions to a variety of technical problems of moderate scope and complexity.
• Active DoD issued security clearance is required. U.S. citizenship is required, as only U.S. citizens are eligible for a security clearance.

Qualifications

We Prefer

• Advanced degree in an Engineering discipline
• Leadership experience with small teams (4-6 people)
• Supplier interaction and supplier management experience
• Ability to work in teams or independently, flexible, demonstrates initiative
• Experience in mechanical sub-systems packaging, materials, thermal, structural analysis, energetics principals, control systems, interconnect, airframe, or large assembly development
• Strong interpersonal and communication skills; both verbal and written
• Geometric Dimensioning & Tolerancing (GD&T) per ANSI Y14.5
• Experience with CREO (Pro/E) or similar 3D solid modeling software
• Experience with PTC Windchill Product Data Management or equivalent configuration/data management software
• Ability to travel to government and supplier facilities in support of program activities

Learn More & Apply Now

• We offer a robust total rewards package that goes above and beyond with compensation; healthcare, wellness, retirement and work/life benefits; career development and recognition programs.
• Additional Details:
• This position requires a interim security clearance.
• Please ensure the role type defined below is appropriate for your needs before applying to this role. This position is classified as:
• 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.
• Hybrid: Employees who are working in Hybrid roles will work regularly both onsite and offsite. Ratio of time working onsite will be determined in partnership with your leader.
• Remote: Employees who are working in Remote roles will work primarily offsite (from home). If you live within a reasonable commute of an RTX site with other colleagues you interact with, your manager will discuss whether there is a degree of onsite presence associated with this role.
• Candidates will learn more about role type and current site status throughout the recruiting process. For onsite and hybrid roles, commuting to and from the assigned site is the employee’s personal responsibility.
• Requires broad management and leadership knowledge to lead project teams.
• Typically requires: A University Degree or equivalent experience and minimum 5 years prior relevant experience, or An Advanced Degree in a related field and minimum 3