Co-Op, Thermal Test Engineer, Fall 2026 (July-December)

The role

You will support the thermal test lab and product validation efforts. You will build and maintain test setups, execute thermal and fluidic testing, and collect data to inform product development.

What you will do

• Build, assemble, and maintain thermal and fluidic test setups
• Execute testing on cooling plates and assemblies
• Perform leak testing, flow rate measurement, and pressure drop characterization
• Perform thermal performance evaluation
• Instrument test setups with thermocouples, pressure sensors, and flow meters
• Collect, clean, and organize test data for analysis
• Support development and refinement of standardized test methods
• Troubleshoot test setups, fixtures, and data acquisition systems
• Collaborate with engineering to evaluate new designs and process improvements
• Assist in documenting results for internal reports and customer-facing materials

Required qualifications

• Pursuing a degree in Mechanical Engineering, Industrial Engineering, or a related field
• Strong hands-on aptitude and interest in building and debugging physical systems
• Basic understanding of heat transfer, thermodynamics, and fluid mechanics
• Experience with lab equipment, instrumentation, or test setups (academic or internship)
• Ability to work independently and take ownership of tasks from setup through execution
• Strong attention to detail and commitment to repeatable, high-quality results
• Clear written and verbal communication skills

Nice to have

• Experience with data acquisition systems (DAQ), sensors, or lab instrumentation
• Familiarity with Python, MATLAB, or similar tools for data analysis
• Experience with CAD tools (Onshape or SOLIDWORKS)
• Exposure to thermal systems, cooling loops, or fluid handling systems
• Previous co-op, internship, or hands-on project experience in a lab or manufacturing environment

Before you apply

• Requires access to information subject to control under U.S. export control laws and regulations (EAR and ITAR)
• Employment is conditioned on authorization to receive controlled items without sponsorship for an export license
• Must be authorized to work for any employer in the U.S.
• Unable to sponsor or take over sponsorship of an employment Visa

About the company

Alloy is a 45-person hardtech startup founded in 2020 that has raised over $50M in capital. They ship complex metal components that improve heat dissipation in high-performance systems.