Senior Mechanical Engineer P3

RTX; Tucson (AZ); On-site; USD 87,000 - 165,000; Full time

Job summary

RTX in Tucson, AZ is seeking Senior Mechanical Engineers to lead design, development and production support across Land Based Effectors projects. You will own subsystems, perform tolerancing, DFMA/DFP analyses, and coordinate with suppliers and internal teams.

Responsibilities include leading small teams, mentoring junior engineers, enabling robust manufacturing processes, and ensuring adherence to program requirements. This onsite role requires DoD clearance and U.S. citizenship.

Qualifications

• Requires a STEM degree with 6+ years of mechanical design experience.
• Active DoD security clearance and U.S. citizenship are required.
• Experience with GD&T per ANSI Y14.5 and design for manufacturability.

Responsibilities

• Own mechanical design and documentation for sub-systems and end items.
• Lead small teams and mentor junior engineers.
• Collaborate with suppliers and Raytheon factories on manufacturing improvements.
• Perform tolerance analyses to ensure fit and function.

Skills

Mechanical design

Team leadership

GD&T

CREO

Windchill

Problem solving

Communication skills

Education

Bachelor's Degree in STEM

Advanced Engineering Degree

Tools

CREO (Pro/E)

Windchill

Job description

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.

Hardware Engineering, Land Based Effectors Department

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

• 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.
• 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.

Additional Details

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 years experience Engineering/Other Technical Positions: Typically requires a degree in Science, Technology, Engineering or Mathematics (STEM) and a minimum of 5 years of prior relevant experience unless prohibited by local laws/regulations.

Salary

The salary range for this role is 86,800 USD - 165,200 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.

Benefits

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.

Additional Position Details

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.

Application Window

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.

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.

Privacy Policy and Terms RTX 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, Pratt & Whitney, and Raytheon. Its 195,000 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, Virginia.