2026 Fulltime Raytheon Mechanical Engineer I - Thermal Engineer

Date Posted:

2026-03-02

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 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 an entry-level Thermal Engineer to join the MA&T Department. In this role you will get the opportunity to work on products throughout their lifecycle from initial design trade studies and proposals through qualification testing to enduring production support.  Entry level engineers will join and learn from a team of 200+ engineers working in all areas of thermal engineering, and can expect a wide variety of assignments, from classical electronics thermal analyses to cutting edge test definition and execution including field test support at locations around the world.

What You Will Do

• Perform hand calculations and determine requirements for higher order detailed analysis
• Perform detailed thermal analyses to solve various program thermal design challenges
• Generate test plans to validate analyses and verify hardware compliance to requirements
• Support test setup and execution, analyze test data, correlate and validate thermal models
• Work with experienced engineers on problems of moderate complexity to provide solutions within program cost and schedule constraints
• Coordinate and lead technical peer reviews ensuring the technical accuracy of work product
• Present results to internal stakeholders and external customers
• Generate detailed, archival technical reports

What You Will Learn

• How to work as part of an Integrated Product Team, collaborating with other engineering disciplines to solve challenging technical problems for our customers
• How thermal engineering is conducted in an innovative industry setting, through comprehensive department-sponsored training and mentoring from senior staff

Qualifications You Must Have

• Bachelor’s degree in Science, Technology, Engineering or Mathematics (STEM)

• Experience in thermal analysis with any of the following tools: FloTHERM, PATRAN, Thermal Desktop/SINDA or ANSYS or equivalent

• Experience in mechanical principles to solve classical thermal analysis solutions both inside and outside of finite element tools.

Qualifications We Prefer

• Experience with solid modeling CAD tool such as CREO or equivalent
• Excellent communication skills; both verbal and written
• Academic or professional experience in electronics cooling and aerodynamic heating analyses
• Academic or professional experience in electronics cooling and aerodynamic heating analyses

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.

• Relocation Eligibility

Learn More & Apply Now!

• Please consider the following role type definition as you apply for this role.

• 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.

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