Senior Mechanical Engineer - Thermal Engineer

Date Posted:

2026-07-30

 Country:

United States of America

 Location:

US-AZ-TUCSON-805 ~ 1151 E Hermans Rd ~ BLDG 805

 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 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 complimented and validated by tests executed in a manner to ensure cost effective yet technically balanced solutions.

Raytheon is seeking a mid-level career Senior Thermal Engineer to join the MA&T Department. The Thermal Engineer is responsible for detailed thermal analysis on products throughout their lifecycle from initial design trade studies and proposals through qualification testing to enduring production support. The analyses will cover a wide range of difficult problems, requiring solutions that are imaginative, thorough, practical, and consistent with organization objectives. The analysis tasks will span the spectrum from classical hand analyses to detailed analyses requiring the use of finite element analysis software. A Thermal Engineer of this salary grade is expected to have a level of technical competence with heat transfer principles. The Thermal Engineer will be held accountable for completing his/her work within the agreed upon cost and schedule. Additionally, the selected candidate will be expected to present their work for peer reviews and to be a peer reviewer for other engineers’ work. Finally, the engineer is expected to plan and support tests, perform data reduction and engage in thermal model correlation.

**This is an onsite position at our Tucson, AZ facility**

What You Will Do

• •Perform Hand Calculations to determine scope of higher detail analysis models
• •Perform detailed thermal analyses to solve various program thermal challenges
• •Generate test plans required to validate analyses and verify hardware compliance to customer requirements
• •Analyze test data to validate and correlate models
• •Work with experienced analysts on problems of moderate complexity to provide the answers needed under program cost and schedule constraints
• •Review your work with peers to ensure technical accuracy
• •Present results to internal, external, and government customers
• •May travel to government and other facilities in support of program activities
• •Generate detailed documentation of work and archive for reference
• •Act as a technical leader (help define/refine and/or develop MA&T department technical processes and tools) and/or lead analysis/test teams

Qualifications You Must Have

• •Bachelor’s degree in Science, Technology, Engineering or Mathematics (STEM) and a minimum of 5 years of prior relevant experience; An advanced degree in a related field may be substituted for additional years of experience as follows: Master’s is equal to 2 years of experience or a Ph.D. is equal to 5 years of experience
• •Experience in thermal analysis with any of the following tools: ANSYS, PATRAN, or Thermal Desktop/SINDA or equivalent
• •Experience in mechanical principles to solve classical thermal analysis solutions both inside and outside of finite element tools and an ability to work independently and manage multiple priorities
• •Demonstrated experience in thermal testing: Planning, organization, execution, data reduction and correlation
• •Ability to obtain a U.S. government issued security clearance. U.S. citizenship is required, as only U.S. citizens are eligible for a security clearance, Clearance must be active and transferable prior to start date

Qualifications We Prefer

• •Advanced degree in aforementioned disciplines. ABET is the preferred, although not required, accreditation standard
• •8+ years of professional experience in the thermal analysis of complex systems that require collaboration of multiple engineering disciplines
• •Experience with solid modeling CAD tool such as CREO or equivalent
• •Experience in Electronics Cooling and Aerodynamic Heating Analyses
• •Demonstrated experience in leading a team of thermal analysts on program efforts
• •Demonstrated experience in leading thermal testing, including model correlation
• •Ability to travel to government and other facilities in support of program activities

What We Offer

Whether you’re just starting out on your career journey or are an experienced professional, 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. Some of the superior benefits we offer include parental (including paternal) leave, flexible work schedules, achievement awards, educational assistance, and child/adult backup care.

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.

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.

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.

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.

Hired applicants may be eligible for benefits, including but not limited to, medical, dental, vision, life insurance, short