A

Alloy Enterprises

Rapid fabrication of complex aluminum components

Thermal Test Engineer

Full-Time
$75k - $90k/yr
Mid
Bachelor's
Burlington, MA, USA
In Person
Manufacturing Quality & TestInspection & Test
No H1B Sponsorship

About the job

Requirements
  • A Bachelor's degree in Mechanical Engineering, a related field, or equivalent practical experience.
  • A strong understanding of heat transfer, thermodynamics, and fluid mechanics.
  • Demonstrated experience designing and building test fixtures and setups.
  • Proficiency with data acquisition systems and sensor technology, including thermocouples, pressure transducers, and flow meters.
  • Experience with Python or another programming language, preferably involving automation and controls.
  • The ability to solve problems and work independently.
  • Strong communication and presentation skills.
  • Applicants must be authorized to work for any employer in the United States.
  • Any employment offer is conditioned on authorization to receive export-controlled items without sponsorship for an export license.
Responsibilities
  • Take ownership of the thermal test lab, including organization, safety, hardware procurement, and management.
  • Design, build, and configure test setups to evaluate thermal-component performance under varied conditions.
  • Conduct thermal and fluidic testing on cold plates and other thermal-management components.
  • Analyze and interpret test data, providing actionable insights to design and manufacturing teams to drive product improvements.
  • Research and propose testing methodologies and equipment to improve testing capabilities and efficiency.
  • Present findings and project proposals to leadership to secure resources.
  • Collaborate with the engineering team on the design of customer parts, with potential growth into an Applications Engineer role.
Desired Qualifications
  • Experience with thermal simulation software such as SOLIDWORKS Flow Simulation, Ansys Icepak, or Flotherm.
  • Familiarity with Keysight data acquisition software.
  • Experience in a fast-paced startup environment.

About the company

Alloy Enterprises manufactures aluminum components through a rapid fabrication process using semisolid diffusion to create complex parts like cold plates with internal channels, heatsinks, chillers, brackets, and connectors. The semisolid diffusion method produces parts without specialized molds, reducing material use and enabling fast prototyping and production across multiple versions of product families for mass customization. Compared with traditional methods, the process lowers costs, minimizes waste, and speeds turnaround while supporting high-volume production and reshoring. The goal is to provide high-quality, affordable aluminum components at scale to shorten development cycles and ensure steady supply for customers in thermal management and related industries.

Company Size

11-50

Company Stage

Series A

Total Funding

$30.4M

Headquarters

Somerville, Massachusetts

Founded

2020

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Simplify's Take

What believers are saying

  • Copper DLC launched June 2025 and is already shipping to customers.
  • Alloy claims up to 35% better thermal efficiency and 75% lower pressure drop.
  • The 2023 $26 million Series A funded scale-up, and JCI bought them afterward.

What critics are saying

  • Johnson Controls now owns Alloy; integration slip can erase startup speed by 2027.
  • Vertiv bought Strategic Thermal Labs in April 2026, intensifying cold-plate competition immediately.
  • Alloy's value concentrates in data-center cooling; customer win loss would cripple standalone relevance.

What makes Alloy Enterprises unique

  • Stack Forging makes leak-tight, single-piece aluminum and copper cold plates with embedded microgeometries.
  • Johnson Controls completed the acquisition on May 13, 2026, validating Alloy's thermal platform.
  • Alloy ships production copper components for GPUs, CPUs, NICs, and semiconductor tools.

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Benefits

  • Remote Work Options
  • Flexible Work Hours
  • Health Insurance
  • 401(k) Retirement Plan
  • 401(k) Company Match
  • Paid Vacation
  • Paid Holidays
  • Professional Development Budget
  • Conference Attendance Budget
  • Wallet?
  • Wellness Program
  • Gym Membership

Growth & Insights and Company News

6 month growth

-16%

1 year growth

0%

2 year growth

-3%
PR Newswire
Feb 18th, 2026
Johnson Controls to acquire Alloy Enterprises, boosting data center cooling efficiency by up to 35%

Johnson Controls has signed an agreement to acquire Alloy Enterprises, a Boston-based thermal management technology company, to strengthen its position in the data centre cooling market. Financial terms were not disclosed. Founded in 2020, Alloy Enterprises specialises in advanced direct liquid cooling components that can improve thermal management efficiency by up to 35% and reduce pressure drop by up to 75%, resulting in lower overall cooling system energy use. The company's proprietary Stack Forging manufacturing process creates single-piece components with embedded microgeometries for maximum heat transfer. The acquisition complements Johnson Controls' existing thermal management portfolio and aligns with its strategy to deliver differentiated cooling solutions for AI-driven data centres. The transaction is expected to close in fiscal Q3, subject to regulatory approvals.

3DPrint.com
Jun 10th, 2025
Alloy Enterprises Unveils 3D Printed Copper Cooling for AI Data Centers

Boston-based Alloy Enterprises has unveiled a new line of copper direct liquid cooling (DLC) components designed to help data centers slash energy use, cut costs, and eliminate the need for traditional heating, ventilation, and air conditioning (HVAC) systems.

Source 360 Media LLC
Oct 24th, 2023
Alloy Enterprises Launches Aluminum Cold Plate Components

Alloy Enterprises launches aluminum cold plate components.

SomerNova
Jun 14th, 2023
This Lockheed martin-backed startup 3d-prints aluminum for EV parts

Recently, Alloy Enterprises raised $26 million in a Series A funding round which pushed its total funding to $37 million, with contributions from investors such as Piva Capital, MassMutual Catalyst Fund, and aerospace company Lockheed Martin.

3Dnatives
May 19th, 2023
Alloy Enterprises Secures $26 Million Funding to Fuel Expansion of 3D Printed Aluminum Parts Production

With this latest investment, Alloy Enterprises has raised a total of $37 million in funding.