Principal Process Engineer

Date Posted: 2026-09-25 Country: United States of America Location: US-AZ-TUCSON-801 ~ 1151 E Hermans Rd ~ BLDG 801 (External Site) 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: Secret - Current Security Clearance Status: Active and existing security clearance required on day 1

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.

What You Will Do:

If you’re self-motivated and thrive working with multi-disciplined teams who are committed to innovation and pushing the boundaries of technology, then this might be the perfect job.

As a Raytheon Principal Process Engineer, you’ll work to improve processes to maintain efficiency, reduce costs, improve sustainability and safety, and maximize profitability.

You’re the in-factory materials and process specialist, and your responsibilities will include verifying that Technical Data Package (TDP) shelf-life materials are correctly called out in Manufacturing Data Packages (MDPs) and writing material processing procedures.

In addition, you’ll collaborate on integrating process equipment within the factory and you’ll document the equipment’s functionality.

• Your responsibilities will also include:
• Quickly addressing production issues related to materials and processes, ensuring root causes of issues are understood and solutions are robust and cost effective.
• Providing on-the-job training for materials and processes.
• Training other engineers on material usage and processes.
• Being readily available to operators and collaborating effectively with factory personnel.
• Serving as Operations Liaison working with Materials & Process Engineering (MPE) to quickly address supply chain disruptions, problem buys and obsolete materials including: Identifying impacted end users Determining material requirements and finding alternatives (drive testing as needed) Ensuring new materials will work in existing processes and using the opportunity to drive to common materials.
• Leading continuous improvement projects utilizing Lean manufacturing techniques to reduce variability, eliminate constraints and provide ongoing process sustainment.
• Collaborating with cross-functional teams to identify and resolve process and materials-related issues.
• Driving use of common materials based on allowable requirements from the drawing.
• Developing and maintaining manufacturing procedures by creating new documentation and updating existing processes to ensure accuracy and efficiency.
• Leading and supporting process troubleshooting efforts to quickly and efficiently resolve manufacturing process issues.
• Coordinating with MPE Labs for Cause Corrective Action as required.

This is a 1st Shift Job. Typically 7:00AM – 4:00PM. This job is posted as ONSITE, and is based at Raytheon’s Tucson, AZ facility.

Qualifications

You Must Have Typically Requires a Bachelor's degree in Science, Technology, Engineering or Math (STEM) and minimum 8 years of relevant experience. Experience with project execution Experience with manufacturing/production processes

We Prefer

• Experience with materials and material testing
• Experience with manufacturing processes
• Experience with technical writing
• Bachelor’s or Master’s Degree in Chemical Engineering, Material Science, Manufacturing Engineering, Mechanical Engineering or related field

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.

Salary

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.

Benefits

• 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
• holidays
• annual short-term and/or long-term incentive compensation programs

Specific benefits are dependent upon the specific business unit as well as whether or not the position 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.

Equal Opportunity

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.

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.