Sr. Principal Mechanical Engineer-Structural Eng.

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 leveraging industry-leading commercial tools. All 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 MA&T Department with a specialized background in high-temperature structural materials, including refractory metals, ceramics, and Ceramic Matrix Composites (CMCs). In this onsite role based in Tucson, AZ, you will serve as a technical Subject Matter Expert (SME) and leader, defining the scope of analysis and testing required to meet program objectives.

You will act as a recognized technical leader, helping to define and develop departmental technical processes and tools. Your work will span the spectrum from classical hand calculations to detailed finite element analyses, supporting all phases of programs from development to production. You will be accountable for individual work within agreed-upon cost and schedule constraints, presenting results to internal stakeholders and external government customers. As a peer reviewer and leader, you will ensure the technical accuracy of work products while guiding teams to meet critical milestones.

Hiring Process and Application

Candidates must be U.S. citizens, as only U.S. citizens are eligible for the required active and transferable U.S. government-issued Secret security clearance prior to the start date. Please note that 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.

RTX anticipates the application window closing approximately 40 days from the date the notice was posted, though business necessity may require adjustments. Please consider the role type definition as you apply: Onsite roles require employees to work primarily onsite, as they are essential to the development of our products.

Our Culture and Commitment

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.

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.