Thermal Analyst II- Marlborough, MA

RTX; Marlborough (MA); On-site; USD 69,000 - 131,000; Full time

Benefits offered by this job

Relocation assistance

Parental leave

Flexible work schedules

Educational assistance

Wellness benefits

Job summary

RTX in Marlborough, MA is seeking an early-career Thermal Analyst II to perform detailed thermal analyses on products across their lifecycle. The role is onsite, requiring ability to obtain and maintain a U.S. government security clearance and U.S. citizenship.

You will conduct hand calculations, build and validate models with tools like FloTHERM/ANSYS, and present results to stakeholders while collaborating with cross-functional teams in a fast-paced defense environment.

Qualifications

• Degree in Science, Technology, Engineering or Mathematics (STEM) with 2+ years experience or an advanced degree.
• Experience in thermal analysis using FloTHERM, PATRAN, Thermal Desktop/SINDA or ANSYS or equivalent.
• Ability to obtain and maintain a U.S. government issued security clearance; U.S. citizenship required.

Responsibilities

• Perform hand calculations to determine scope of higher detail analysis models.
• Generate test plans required to validate analyses and verify hardware compliance to customer requirements.
• Analyze test data to validate and correlate models.
• Review your work with peers to ensure technical accuracy.
• Present results to internal, external, and government customers.
• Generate detailed documentation of work and archive for reference.

Skills

Thermal analysis

Independent work

Team collaboration

Security clearance eligibility

Education

STEM degree

Advanced degree (related field)

Tools

FloTHERM

PATRAN

Thermal Desktop/SINDA

ANSYS

Job description

Date Posted: 2026-10-26 Country: United States of America Location: US-MA-MARLBOROUGH-MA1 ~ 1001 Boston Post Rd ~ BLDG 1 Position Role Type: Onsite U.S. Citizen, U.S. Person, or Immigration Status Requirements: The ability to obtain and maintain a U.S. government issued security clearance is required. 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: Active and existing security clearance required after 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.

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.

The Thermal Analyst II position is located in Marlborough, MA, and the role is onsite. As an early career Thermal Analyst you will be 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 analysis will cover a wide range of difficult problems, requiring solutions that are imaginative, thorough, practicable, 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 thermodynamic 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.

What You Will Do

• Perform Hand Calculations to determine scope of higher detail analysis models
• Generate test plans required to validate analyses and verify hardware compliance to customer requirements
• Analyze test data to validate and correlate models
• Review your work with peers to ensure technical accuracy
• Present results to internal, external, and government customers
• Generate detailed documentation of work and archive for reference

Qualifications

You Must Have Typically requires a degree in Science, Technology, Engineering or Mathematics (STEM) and a minimum of 2 years of prior relevant experience or an Advanced Degree in a related field and 0 years' experience

• 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 and an ability to work independently and manage multiple priorities
• 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
• Ability to work in a collaborative, team-based environment and independently

We Prefer

• Degree in Mechanical or Aerospace Engineering
• 5+ years of professional experience in the thermal analysis of complex systems that require collaboration across multiple engineering disciplines
• Experience with solid modeling CAD tools such as CREO or equivalent
• Experience in Electronics Cooling and Aerodynamic Heating Analyses
• 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.
• Relocation Eligible - relocation assistance is available for this position.

Salary

The salary range for this role is 68,900 USD - 131,100 USD.

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.

Company Overview

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.