JETCOOL Technologies

JETCOOL Technologies

Principal Thermal Mechanical Engineer

USA, MA, Littleton · Principal

Sponsorship not specifiedDetected 30 days ago
AccessibilityProduct ManagementThermal AnalysisMechanical DesignResearchLeadershipCommunicationProblem SolvingMentoringPublic SpeakingThermodynamics

About the role

  • Reporting to the Mechanical Development Associate Principal Engineer the Principal Thermal Mechanical Engineer will play a pivotal role in the early phases of product development and serving in a guidance capacity through product maturation.
  • The experience we're looking to add to our team:

Responsibilities

  • At JetCool, a Flex company, we're at the forefront of liquid cooling innovation, delivering advanced solutions that empower our partners in AI and high-performance computing.
  • A career at JetCool offers the opportunity to make a real impact by helping build smarter, more sustainable data centers.
  • Together, we're not just advancing technology - we're redefining cooling standards to create a more sustainable tomorrow.
  • Our products drive sustainability across the data center infrastructure by allowing higher coolant temperatures and by driving more complete heat capture for liquid cooling.
  • Lead the architecture, design, analysis, and optimization of complex fluid and thermal systems-including pumps, fluids, tubing, heat exchangers, and associated components-for advanced computing and processing platforms.
  • Own mechanical and fluid system deliverables from concept through production, ensuring designs meet performance, reliability, manufacturability, and compliance requirements.
  • Drive simulation, analysis, and test efforts to validate fluid flow, pressure drop, thermal performance, and material compatibility across operating conditions.
  • Develop, review, and approve engineering requirements, specifications, and technical documentation in accordance with applicable industry standards and regulatory expectations.

Requirements

  • Provide technical leadership, mentorship, and guidance to engineers across experience levels, supporting professional development and raising overall team capability.

Compensation

  • Pay Range (Applicable to Massachusetts)

Benefits

  • Full range of medical, dental, and vision plans
  • Life Insurance
  • Short-term and Long-term Disability
  • Vacation and Paid Sick Time
  • Tuition Reimbursement

Company info

  • Minimum of 7+ years of experience designing and engineering fluid systems in data center thermal management and cooling, automotive, medical, or nuclear industries, including at least 3+ years of direct experience with Coolant Distribution Units (CDUs).
  • Deep expertise in fluid dynamics, thermodynamics, and heat transfer, with strong application of first principles engineering.
  • Proven track record of new product development in thermal or fluid systems, including concept development, performance analysis, validation testing, and experimental design.
  • Strong analytical and problem solving capabilities, with demonstrated ability to troubleshoot and optimize complex fluid systems across development and production phases.
  • Demonstrated technical leadership within a structured product development environment, with clear ownership of mechanical design deliverables from concept through release.
  • Experience leading and mentoring development teams, driving technical direction, coordinating cross functional efforts, and ensuring alignment to product requirements and schedules.
  • Accountability for product level mechanical execution, including leading design reviews, resolving technical risks, and ensuring designs meet performance, reliability, manufacturability, and compliance requirements.
  • Strong communication and technical documentation skills, with the ability to clearly communicate complex concepts to technical teams and senior stakeholders.
  • Serve as a technical partner to customers and external collaborators, supporting system‑level integration of fluid solutions into broader product architectures.
  • To support our extraordinary teams who build great products and contribute to our growth, we're looking to add a Principal Thermal Mechanical Engineer located in Littleton, MA.
  • The Principal Mechanical Engineer will provide technical leadership, mentorship, and hands-on expertise in mechanical design, fluid dynamics, and heat transfer but also work closely with customers in communicating the art of the possible with JetCool technology and building a strong customer relationship on a technical level.
  • Lead and influence design reviews, presenting technical tradeoffs, risks, and recommendations to cross‑functional teams, customers, and senior stakeholders.

Visa & Work Authorization

  • Is Sponsorship Available?
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This listing is sourced directly from JETCOOL Technologies's careers page and normalized into a canonical job model.