Senior Principal Mechanical Engineer - Structural, High Temp Materials

About Raytheon and the Mission

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.

About the Team

The Mechanical Analysis and Test (MA&T) Department is responsible for ensuring structural and thermal design robustness across the Raytheon portfolio of products. From preliminary concepts to fielded weapon system support, MA&T delivers innovative structural and thermal engineering solutions utilizing methods ranging from classical fundamental & empirically based techniques to state-of-the-art finite element methods. These solutions are complemented and validated by tests executed in a manner to ensure cost-effective yet technically balanced outcomes.

About the Role

Raytheon is seeking an experienced Senior Principal Structural Engineer to join the Mechanical Analysis and Test Department. This role is critical for supporting all phases of programs, from development to production, with a specific focus on high-temperature structural materials such as refractory metals, Ceramics, and Ceramic Matrix Composites (CMCs). As a recognized technical leader, you will define the scope and level of analysis and testing required to meet objectives, acting as a Subject Matter Expert (SME) to help develop departmental technical processes and tools.

In this onsite position located in Tucson, AZ, you will work under general direction to solve complex problems that require imaginative, thorough, and practicable solutions. Your day-to-day will span the spectrum from classical hand calculations to detailed finite element analyses, and from coupon-level material characterization to subsystem and system-level design verification testing. You will be accountable for your individual work within agreed-upon cost and schedule constraints, presenting results to internal stakeholders and external government customers, and leading technical peer reviews to ensure the accuracy of work products.

Hiring Process and Application

Candidates must possess an active and transferable U.S. government-issued security clearance (Secret level) prior to the start date, as U.S. citizenship is required. The interview process may include select steps conducted in-person at one of our office locations to maintain a secure hiring environment. Applications are accepted until the window closes approximately 40 days from the posting date, though this may be adjusted based on candidate flow and business necessity.

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.